Question

Which of the following is/are true about deformation of a material?

• A. Deformation capacity of the plastic hinge and resilience of the connections are essential for good plastic behavior
• B. Deformation capacity equations considering yield stress and gradient of moment
• C. Different materials have different deformation capacity
• D. All of the above

Answer 1

Answer: (D)

All of the above

In well-designed steel frame structures, inelastic deformation under severe seismic loading is confirmed in beam plastic hinges located near the beam-to-column connections. Thus, deformation capacity of the plastic hinge and resilience of the connections are essential for good plastic behavior and expected energy dissipation in steel frame structures. This essential plastic behaviour at the hinge is strongly influenced by the difference of material properties. Generally, the material properties are specified in terms of yield stress and/or ultimate strength. However, the characteristics of the materials are not defined by only these properties. Thus, the characteristics of various materials aren’t reflected in present building codes, particularly on deformation capacity classification.