New Approach for the Construction of Inelastic Stiffness Matrix for

نویسنده:
,
سال
: 2008
چکیده: There seems to be many situations where an inelastic analysis needs to be performed on a

frame structure. In the last decades, the subject has received much interest from many

researchers, especially for seismic applications. Different models have been proposed for the

frame element to represent its inelastic behavior, among which, the one component models

with inelastic springs are widely used. In such models, each frame member is represented by

an elastic element, with several nonlinear springs, mostly located at the ends of the element.

These models suffer several deficiencies, mentioned in the context. To overcome such

deficiencies, a new approach is suggested for the construction of inelastic stiffness matrix of

the frame element. In the proposed method, some virtual inelastic springs are attached to the

elastic element. Such springs model plasticity in the strain states beyond the rigid body modes

of the element. The stiffness matrix of the frame element, obtained through this procedure, is

compared with the conventional ones for its priority.
کلیدواژه(گان): Frame element,Inelasticity,Nonlinear analysis,Plastic hinge,Strain state,Virtual spring
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