Response Spectrum Approach for Nonlinear Hysteretic Structures

本课题研究随机地震激励作用下的非线性滞回结构问题。其目的是开发一种用于计算结构响应的模态反应谱程序，例如杆件受力、变形和最大延性。采用两种随机线性化方法分析了具有滞回力-变形特性的结构。所开发的方法是迭代的，采用结构动力学的模态分析方法，能够提供杆件受力、杆件延性要求、加速度反应和楼板反应谱等响应量。作为最终的成果，该研究提供了一种分析方法，对结构工程师在地震设计荷载下的结构设计评估应该有直接的帮助。

This project deals with the problems of nonlinear hysteretic structures subjected to random earthquake excitations. The objective is to develop a modal response spectrum procedure for the calculation of structural responses such as member forces, deformation, and maximum ductility. Two approaches employing stochastic linearization are used to analyze structures exhibiting hysteretic force-deformation behavior. The approaches developed are iterative, employ the modal analysis method of structual dynamics, and are able to provide response quantities such as member forces, member ductility requirements, acceleration response and floor response spectra. As a final product, the research provides an analytical approach which should be of direct help to structural engineers in their design evaluations of structures for the earthquake design loads.