TOTAL QUANTITY EXPRESSION-BASED DESIGN SENSITIVITY ANALYSIS OF ELASTIC-PLASTIC RESTORING-FORCE CHARACTERISTICS OF MULTI-PLANE FRAMES

摘要

A method is proposed for expressing analytically a point on a story shear force-interstory drift curve(Q-D curve)in the elastic-plastic range fo a multi-plane building frame subjected to a set of static horizontal forces in terms of total quantities of nodal displacements and angees of nodal rotation. An incremental elastic-plastic response analysis need be done once to find the positions where plastic hinges are formed.A procedure has then been developed for deriving the sensitivities of the point on the Q-D curve with respect to the second moment of area of each member.Thsi sensitivity may be used in reduced model-frame inverse transformation.