大跨空间网格结构在多点输入下的弹塑性地震响应分析

Elastoplastic seismic response analysis of long-span space latticed structures under multi-support excitation

采用时程分析法对大跨空间网格结构分别进行了多点和一致输入下的弹塑性地震响应分析,多点输入下的相干函数模型采用著名的R.S.H arichandran模型.对两种输入方式下的结构响应进行了对比,发现两者的塑性开展规律大体一致,但多点输入下进入塑性杆件的数量明显多于一致输入,同时塑性杆件分布更加均匀.

The dynamic behaviors of long-span space lattice structures are thoroughly analyzed based upon elastoplastic time history method under multiple support excitation and simple support excitation. The R. S Harichandran model is used as the horizontal coherency function. The systemic contrast upon the response of structure shows the rules of plastic development of the two modes are generally unanimous and elements which get into plastic under multiple support excitations are more than those under simple support excitations. At the same time the distribution of plastic elements are more uniformity.