89 + Interview Questions in Plastic And Local Buckling Behaviour Of Steel in Design Of Steel Structures Page 2 InterviewSolution

51.	What is static theorem ?(a) load must be greater than collapse load(b) load must be less than collapse load(c) load must be not equal to collapse load(d) load cannot be related to collapse loadI had been asked this question during an interview for a job.This intriguing question comes from Theorem of Plastic Collapse & Methods of Plastic Analysis in chapter Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» Correct option is (B) load must be less than COLLAPSE load The explanation: For a given frame and loading if there exists any distribution of bending moments throughout the frame which is both safe and STATICALLY ADMISSIBLE with set of load P, then value of load P must be less than or equal to collapse load.

Discussion

52.	Virtual work is used to determine _____(a) yield load(b) elastic load(c) plastic load(d) collapse loadThis question was posed to me at a job interview.My enquiry is from Conditions of Plastic Analysis in section Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» The correct choice is (d) collapse load Easiest explanation: Virtual work principle is used to DETERMINE collapse load. It is the APPLICATION of principle of least action to study forces and MOVEMENT of a SYSTEM.

Discussion

53.	Principle of virtual work is used to satisfy _____(a) mechanism condition(b) equilibrium condition(c) plasticity condition(d) no condition is satisfiedThe question was posed to me during an interview for a job.My enquiry is from Conditions of Plastic Analysis in section Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» Correct answer is (B) equilibrium CONDITION To explain I would SAY: The principle of virtual work is USED to satisfy equilibrium condition of plastic analysis. If the work condition is formulated correctly the equilibrium conditionis automatically satisfied.

Discussion

54.	Which load is obtained when equilibrium and plasticity conditions of plastic analysis are satisfied?(a) plastic limit load(b) upper bound solution of true ultimate load(c) lower bound solution of true ultimate load(d) no solutionThe question was asked in quiz.The above asked question is from Conditions of Plastic Analysis in division Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» The correct choice is (c) LOWER bound solution of TRUE ultimate load For EXPLANATION: When equilibrium and plasticity conditions of plastic analysis are SATISFIED, an lower bound solution of true ultimate load is OBTAINED.

Discussion

55.	What is principle of virtual work?(a) work done by external forces is greater than work done by internal forces(b) work done by external forces is less than work done by internal forces(c) work done by external forces is equal to work done by internal forces(d) work done by internal forces is greater than work done by external forcesThis question was posed to me in final exam.The origin of the question is Conditions of Plastic Analysis in division Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» The correct OPTION is (C) work done by external forces is equal to work done by INTERNAL forces For EXPLANATION: The principle of virtual work may be stated as if a system of forces in equilibrium is SUBJECTED to virtual displacement, the work done by external forces is equal to work done by internal forces.

Discussion

56.	Lowest plastic limit load is obtained when _____(a) only equilibrium condition of plastic analysis is satisfied(b) only equilibrium and mechanism condition of plastic analysis are satisfied(c) only mechanism condition of plastic analysis is satisfied(d) equilibrium, mechanism and plasticity condition of plastic analysis are satisfiedThis question was posed to me in a national level competition.I'd like to ask this question from Conditions of Plastic Analysis topic in portion Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer»

Discussion

57.	Which load is obtained when equilibrium and mechanism conditions of plastic analysis are satisfied?(a) plastic limit load(b) upper bound solution of true ultimate load(c) lower bound solution of true ultimate load(d) no solutionThe question was asked in semester exam.My doubt stems from Conditions of Plastic Analysis in chapter Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» Correct option is (b) upper BOUND solution of true ultimate load Easy explanation: When equilibrium and mechanism CONDITIONS of plastic analysis are SATISFIED, an upper bound solution of true ultimate load is OBTAINED.

Discussion

58.	Which of the following relation is correct?(a) -Mp ≥ M(b) M > Mp(c) M ≥ Mp(d) M ≤ MpI got this question in an online quiz.My enquiry is from Conditions of Plastic Analysis topic in portion Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» The correct option is (d) M ≤ Mp Best EXPLANATION: The BENDING MOMENT in any section of a structure must be LESS than the plastic moment of the section -Mp ≤ M ≤ Mp.

Discussion

59.	Which of the following is true?(a) ultimate load is reached when a mechanism is formed(b) ultimate load is not reached when a mechanism is formed(c) plastic hinges are not required for beam to form a mechanism(d) frictionless hinges are not required for beam to form a mechanismI got this question in unit test.My question is from Conditions of Plastic Analysis topic in chapter Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» CORRECT answer is (a) ultimate load is reached when a MECHANISM is FORMED Explanation: There must be sufficient number of plastic and FRICTIONLESS hinges for the beam/structure to form a mechanism. The ultimate load is reached when a mechanism is formed.

Discussion

60.	What is the condition for equilibrium in plastic analysis?(a) bending moment distribution defined by assumed plastic hinges must not be in static equilibrium with applied loads and reactions(b) shear force distribution defined by assumed plastic hinges must be in static equilibrium with applied loads and reactions(c) bending moment distribution defined by assumed plastic hinges must be in static equilibrium with applied loads and reactions(d) shear force distribution defined by assumed plastic hinges must not be in static equilibrium with applied loads and reactionsI had been asked this question at a job interview.This question is from Conditions of Plastic Analysis in chapter Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer»

Discussion

61.	Multi-span beams collapse in one span as ___________(a) does not collapse(b) single-bar mechanism(c) two-bar mechanism(d) three-bar mechanismThe question was posed to me during an internship interview.I'm obligated to ask this question of Plastic-Collapse Load topic in chapter Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» The correct OPTION is (c) two-bar mechanism To explain I would say: Multi-span beams generally COLLAPSE in one span as a local two-bar mechanism, WITHIN the span and a hinge at each support. It is possible to have a three-bar mechanism, where two adjacent spans COMBINE to form a mechanism.

Discussion

62.	Single-span beams collapse as ________(a) single-bar mechanism(b) two-bar mechanism(c) three-bar mechanism(d) does not collapseI have been asked this question in unit test.Asked question is from Plastic-Collapse Load topic in section Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» The correct choice is (B) two-bar mechanism To ELABORATE: Single-SPAN beams generally collapse as two-bar MECHANISMS with a HINGE at each support and plastic hinge within the span.

Discussion

63.	Among which of the following is the location of plastic hinge?(a) at supports(b) at centre of beam(c) at points away from concentrated load(d) at centre for uniformly distributed loadThis question was addressed to me in class test.My doubt is from Plastic-Collapse Load in portion Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» Right answer is (a) at SUPPORTS The explanation is: Plastic hinges normally occur at supports, POINTS of CONCENTRATED load, and points where cross section change. The location of plastic hinge in a beam with uniformly DISTRIBUTED load is not well defined.

Discussion

64.	Cantilevers and over hanging beams collapse as _____(a) single-bar mechanism(b) double-bar mechanism(c) three-bar mechanism(d) does not collapseThis question was addressed to me in a job interview.This intriguing question comes from Plastic-Collapse Load in chapter Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» Right answer is (a) single-bar mechanism The explanation is: Cantilevers and over HANGING beams GENERALLY COLLAPSE as single-bar mechanisms with a single plastic hinge at one of the SUPPORTS.

Discussion

65.	Which of the following statement is correct?(a) plastic limit load is obtained by multiplying working load with load factor(b) plastic limit load is obtained by dividing working load with load factor(c) working load is obtained by multiplying plastic limit load with load factor(d) working load is obtained by multiplying working load with load factorI have been asked this question in examination.Origin of the question is Plastic-Collapse Load in section Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» Right CHOICE is (a) plastic LIMIT LOAD is obtained by multiplying working load with load factor The best explanation: Plastic limit load is obtained by multiplying working load with load factor. Depending on combination of loads and their probability of acting at same TIME, different load factors are used.

Discussion

66.	In a fixed beam having concentrated load at one-third point, final ultimate load will be ____ than first hinge load.(a) 33% lower(b) 33% higher(c) 50% higher(d) 50% lowerThe question was posed to me in examination.This intriguing question comes from Plastic-Collapse Load topic in chapter Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» Correct option is (b) 33% higher To elaborate: In a FIXED BEAM having concentrated LOAD at one-third point, final ULTIMATE load will be 33% higher than FIRST hinge load.

Discussion

67.	What is plastic-collapse load?(a) load at which sufficient number of elastic hinges are formed(b) load at which sufficient number of plastic hinges are not formed(c) load at which sufficient number of plastic hinges are formed(d) load at which structure failsThe question was asked during an interview.My question is from Plastic-Collapse Load in portion Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» RIGHT OPTION is (c) load at which sufficient number of plastic hinges are formed The explanation: The load at which sufficient number of plastic hinges are formed in a STRUCTURE such that a collapse mechanism is created is CALLED plastic-collapse load or plastic-limit load.

Discussion

68.	Which of the following is true in a fixed beam having concentrated load at one-third point?(a) first hinge is formed at centre of beam(b) after first hinge, moment at that point increases(c) after first hinge, moment at that point decreases(d) after firsthinge, moment at that hinge remains constantI got this question by my school principal while I was bunking the class.The query is from Plastic-Collapse Load topic in chapter Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» Correct answer is (d) after firsthinge, moment at that hinge remains constant For explanation I would say: In a fixed beam having concentrated load at one-THIRD point, first hinge forms at one of the end SUPPORTS. As load is increased further, moment at this hinge remains constant at Mp, while the moments at the other support and load point increase until second hinge is FORMED. When load is further increased, the moment at these two hinges remain constant at Mp, until third and final hinge is formed to make the beam a mechanism. The final ultimate load will be 33% HIGHER than first hinge load.

Discussion

69.	What is difference between plastic design and elastic design?(a) In plastic design, redistribution of bending moment is considered(b) In plastic design, redistribution of bending moment is not considered(c) In elastic design, redistribution of bending moment is considered(d) Both in plastic and elastic design, redistribution of bending moment is consideredThis question was posed to me in examination.Origin of the question is Plastic-Collapse Load in division Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» Correct ANSWER is (a) In plastic design, redistribution of bending moment is considered To explain I WOULD say: The difference between plastic design and elastic design is that plastic design takes into account the FAVOURABLE redistribution of bending moment which takes PLACE in indeterminate structure after first hinge forms at the point of maximum bending moment.

Discussion

70.	What is the hinged length for simply supported rectangular beamof span L with uniformly distributed load?(a) L/√3(b) L/√2(c) L/2(d) L/5This question was posed to me during a job interview.Origin of the question is General Requirements for Plastic Design and Plastic Hinge in section Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» RIGHT choice is (a) L/√3 Best explanation: For SIMPLY supported rectangular BEAM with uniformly DISTRIBUTED load, the HINGED length is equal to span/√3.

Discussion

71.	What is the hinged length for simply supported rectangular beam of span L with central concentrated load?(a) L/√2(b) 2L(c) L/2(d) L/3I have been asked this question in an interview.Question is from General Requirements for Plastic Design and Plastic Hinge in chapter Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» RIGHT choice is (d) L/3 Best EXPLANATION: For simply supported RECTANGULAR BEAM with central CONCENTRATED load, the hinged length is equal to one-third of the span.

Discussion

72.	Hinged length depends upon(a) weight of member(b) type of connection(c) type of loading(d) number of bolts used in connectionI had been asked this question in an online interview.The origin of the question is General Requirements for Plastic Design and Plastic Hinge topic in section Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» Right answer is (c) type of loading Explanation: The HINGED length depends UPON the type of loading and the GEOMETRY of CROSS section of structural member.

Discussion

73.	Which of the following is true about hinged length?(a) value of moment adjacent to yield zone is more than yield moment up to hinged length of structural member(b) value of moment adjacent to yield zone is less than yield moment up to hinged length of structural member(c) value of moment adjacent to yield zone is half the yield moment up to hinged length of structural member(d) value of moment adjacent to yield zone is equal to yield moment up to hinged length of structural memberThis question was addressed to me during an interview for a job.My query is from General Requirements for Plastic Design and Plastic Hinge in section Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» Correct ANSWER is (a) VALUE of moment adjacent to yield zone is more than yield moment up to hinged length of structural member Best EXPLANATION: The value of moment adjacent to yield zone is more than yield moment up to a certain length of structural member. This length is called hinged length.

Discussion

74.	Plastic hinge behaves like a ______(a) friction mechanical hinge except that there is always a fixed moment constraint(b) frictionless mechanical hinge except that there is no fixed moment constraint(c) friction mechanical hinge except that there is no fixed moment constraint(d) frictionless mechanical hinge except that there is always a fixed moment constraintThis question was addressed to me during an interview for a job.I need to ask this question from General Requirements for Plastic Design and Plastic Hinge in chapter Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» The correct CHOICE is (d) frictionless mechanical hinge except that there is ALWAYS a fixed moment constraint The best explanation: PLASTIC hinge behaves like a frictionless mechanical hinge except that there is always a fixed moment constraint which is equal to plastic moment CAPACITY of the section.

Discussion

75.	What is plastic hinge?(a) zone of bending due to flexure in a structural member(b) zone of yielding due to flexure in a structural member(c) zone of non-yielding due to flexure in a structural member(d) zone of yielding due to twisting in a structural memberThe question was posed to me during an interview for a job.This intriguing question originated from General Requirements for Plastic Design and Plastic Hinge in chapter Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» The correct option is (b) zone of yielding due to FLEXURE in a structural MEMBER The explanation: Plastic hinge is a zone of yielding due to flexure in a structural member. It is used to DESCRIBE a deformation of a section when plastic bending OCCURS.

Discussion

76.	Which of the following conditions are true for using plastic method of analysis as per IS 800?(a) members shall not be hot-rolled or fabricated using hot-plates(b) yield stress of steel should not be greater than 450MPa(c) cross section should be unsymmetrical about its axis perpendicular to axis of plastic hinge rotation(d) cross section of members not containing plastic hinges should be ‘plastic’ and those members containing plastic hinges should be ‘compact’The question was asked in an online quiz.Question is from General Requirements for Plastic Design and Plastic Hinge in division Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer»

Discussion

77.	Which of the following is true regarding plastic design methods?(a) design needs to satisfy elastic strain compatibility conditions(b) different factor of safety for all parts of the structure(c) saving of material over elastic methods resulting in lighter structures(d) design is effected by temperature changes, settlement of support, etcI had been asked this question in an interview for job.Origin of the question is General Requirements for Plastic Design and Plastic Hinge topic in section Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» Right option is (c) saving of material over elastic methods resulting in LIGHTER structures Easy explanation: The following are the advantages of plastic design methods: (i) realisation of uniform and realistic factor of SAFETY for all parts of the structure , (ii)simplified ANALYTICAL procedure and rapidity of OBTAINING moments since no NEED to satisfy elastic strain compatibility conditions, (iii) no effect due to temperature changes, settlement of support, etc, (iv) saving of material over elastic methods resulting in lighter structures.

Discussion

78.	Which of the following are the conditions that stress strain characteristics of steel should obey to ensure plastic moment redistribution?(a) yield plateau should be less than 6 times the yield strain(b) ratio of ultimate tensile stress to yield stress should be less than 1.2(c) steel should not exhibit strain-hardening capacity(d) elongation on standard gauge length should be more than 15%The question was asked in examination.Question is from General Requirements for Plastic Design and Plastic Hinge in division Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» CORRECT OPTION is (d) elongation on standard gauge LENGTH should be more than 15% Easiest explanation: The conditions that STRESS strain characteristics of steel should obey to ensure plastic moment redistribution are: (i) yield plateau(horizontal portion of stress strain curve) should be greater than 6 times the yield strain, (ii) ratio of ultimate tensile stress to yield stress should be more than 1.2, (iii) elongation on standard gauge length should be more than 15%, (IV) steel should exhibit strain-hardening capacity.

Discussion

79.	Which of the following assumptions is not correct for plastic design?(a) plastic hinge rotations are small compared with elastic deformations so all the rotations are concentrated at plastic hinges(b) segments between plastic hinges are rigid(c) influence of normal and shear forces on plastic moments is not considered(d) plane section remains plane after bending and the effect of shear is neglectedThis question was addressed to me during an online interview.My question comes from General Requirements for Plastic Design and Plastic Hinge in division Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» RIGHT answer is (a) plastic hinge rotations are small compared with elastic deformations so all the rotations are concentrated at plastic hinges To elaborate: The plastic hinge rotations are large compared with elastic deformations so all the rotations are concentrated at plastic hinges. The SEGMENTS between plastic hinges are rigid. The INFLUENCE of NORMAL and shear forces on plastic moments is not considered. The plane section remains plane EVEN after bending and the effect of shear is neglected.

Discussion

80.	Which of the following assumptions is correct for plastic design?(a) material obeys Hooke’s law before the stress reaches fy(b) yield stress and modulus of elasticity does not have same value in compression and tension(c) material is homogenous and isotropic in both elastic and plastic states.(d) material is not sufficiently ductile to permit large rotationsThe question was posed to me in examination.My question comes from General Requirements for Plastic Design and Plastic Hinge topic in chapter Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» Right answer is (C) material is homogenous and isotropic in both elastic and plastic states. The best EXPLANATION: The material obeys HOOKE’s law till the stress reaches fy. The yield stress and modulus of elasticity have the same value in compression and tension. The material is homogeneous and isotropic in both elastic and plastic states. The material is assumed to be sufficiently ductile to permit large rotations of SECTION to take place.

Discussion

81.	The shape factor does not depend on ___(a) material properties(b) cross sectional shape(c) moment of resistance(d) section modulusThe question was asked in unit test.This interesting question is from Plastic Theory topic in chapter Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» Correct option is (a) material properties The best I can explain: Shape FACTOR, v = ZP/Ze = MP/My, where Zp and Ze are plastic and elastic SECTION modulus respectively, Mp and My are plastic and elastic moments respectively. This ratio is the property of cross-sectional shape and is INDEPENDENT of material properties.

Discussion

82.	Which of the following relation is correct about shape factor, v?(a) v = Zp+Ze(b) v = ZpZe(c) v = Zp/Ze(d) v = Ze/ZpThis question was posed to me in homework.Enquiry is from Plastic Theory in portion Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» CORRECT answer is (c) V = ZP/Ze Best explanation: Shape factor, v = Zp/Ze = Mp/My , where Zp and Ze are plastic and elastic SECTION modulus respectively, Mp and My are plastic and elastic MOMENTS respectively.

Discussion

83.	Which of the following relation is correct for plastic section modulus, Zo ?(a) Zp = 2A(y1+y2)(b) Zp = A(y1+y2)/2(c) Zp = A(y1+y2)/4(d) Zp = 4A(y1+y2)I had been asked this question in final exam.The question is from Plastic Theory topic in division Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» The correct option is (B) Zp = A(y1+y2)/2 Easy EXPLANATION: Zp = A(y1+y2)/2, where A= area of cross SECTION, y1 and y2 are centroids of portion above and below NEUTRAL axis respectively. Plastic modulus is defined as combined statical moment of cross sectional area above and below the equal-area axis.

Discussion

84.	In elastic stage, equilibrium condition is achieved when neutral axis ___________ and in fully plastic stage, it is achieved when neutral axis ___________(a) is above centroid of the section, divides the section into two parts of one-third area and two-third area(b) is below centroid of the section, divides the section into two parts of one-third area and two-third area(c) is above centroid of the section, divides the section into two equal areas(d) passes through centroid of the section, divides the section into two equal areasThe question was posed to me in homework.The above asked question is from Plastic Theory topic in division Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» The correct answer is (d) passes through centroid of the section, divides the section into two equal AREAS To explain: In ELASTIC stage, when BENDING stress VARIES from zero at neutral AXISTO maximum at extreme fibres, equilibrium condition is achieved when neutral axis passes through centroid of the section. In fully plastic stage, because the stress is uniformly equal to yield stress, equilibrium condition is achieved when neutral axis divides the section into two equal areas.

Discussion

85.	What is plastic moment of resistance?(a) maximum moment in stress strain curve, the point where the curvature can increase indefinitely(b) maximum moment in stress strain curve, the point where the curvature can decrease indefinitely(c) minimum moment in stress strain curve, the point where the curvature can increase indefinitely(d) minimum moment in stress strain curve, the point where the curvature can decrease indefinitelyI had been asked this question in an interview.This is a very interesting question from Plastic Theory in portion Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» The correct option is (a) maximum moment in stress STRAIN CURVE, the point where the curvature can increase indefinitely To explain: In stress strain curve, the maximum moment is reached at a point where the curvature can increase indefinitely, neglecting the strain HARDENING BENEFITS. This maximum moment is called plastic moment of resistance and the portion where this moment OCCURS is called as plastic hinge.

Discussion

86.	Which of the following relation about plastic moment is correct?(a) Mp = Zp /fy(b) Mp = Zp + fy(c) Mp = Zpfy(d) Mp = Zp – fyThe question was posed to me during an interview.The origin of the question is Plastic Theory in portion Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» CORRECT choice is (c) Mp = Zpfy The BEST I can explain: When every fibre of the section has a STRAIN equal to or greater than εy=fy/Es , NOMINAL moment strength is referred as plastic moment and is given by Mp = Zpfy , where Zp = ∫ydA is plastic section modulus and fy = yield STRESS.

Discussion

87.	What is buckling?(a) Structural behaviour in which a deformation develops in direction of plane perpendicular to that of load which produced it(b) Structural behaviour in which a deformation does not develop in direction of plane perpendicular to that of load which produced it(c) Structural behaviour in which a deformation develop in direction of plane parallel to that of load which produced it(d) Structural behaviour in which a deformation develops in direction of plane along that of load which produced itI got this question by my college director while I was bunking the class.My enquiry is from Plastic Theory topic in division Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» Right answer is (a) Structural BEHAVIOUR in which a deformation DEVELOPS in direction of plane perpendicular to that of load which produced it The BEST explanation: Buckling may be defined as structural behaviour in which a deformation develops in direction of plane perpendicular to that of load which produced it. This deformation changes rapidly with variations in the applied load.

Discussion

88.	Both elastic and plastic methods neglect ________(a) live load acting on structure(b) dead load acting on structure(c) deformations due to load(d) influence of stabilityThis question was posed to me in a job interview.Asked question is from Plastic Theory in portion Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» CORRECT choice is (d) influence of stability The explanation: Both elastic and plastic methods neglect the influence of stability, which may significantly AFFECT the load carrying capacity of STRUCTURES or elements which are slender and SUBJECTED to compressive stresses.

Discussion

89.	Structures designed using elastic analysis may be ______ than those designed using plastic analysis(a) lighter(b) heavier(c) of same weight(d) almost half times the weightThis question was addressed to me by my school teacher while I was bunking the class.Origin of the question is Plastic Theory in portion Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures
Answer» The correct option is (b) HEAVIER The BEST explanation: In elastic DESIGN structures are designed for allowable STRESS level well below the elastic limit, whereas in plastic design structures are designed using ultimate load RATHER than yield stress, Hence, structures designed using elastic analysis may be heavier than those designed using plastic analysis.

Discussion

Explore topic-wise InterviewSolutions in .

Virtual work is used to determine _____(a) yield load(b) elastic load(c) plastic load(d) collapse loadThis question was posed to me at a job interview.My enquiry is from Conditions of Plastic Analysis in section Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures

Which of the following relation is correct?(a) -Mp ≥ M(b) M > Mp(c) M ≥ Mp(d) M ≤ MpI got this question in an online quiz.My enquiry is from Conditions of Plastic Analysis topic in portion Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures

Which of the following relation is correct about shape factor, v?(a) v = Zp+Ze(b) v = ZpZe(c) v = Zp/Ze(d) v = Ze/ZpThis question was posed to me in homework.Enquiry is from Plastic Theory in portion Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures