【摘要】 利用弹塑性有限元理论和基于AutoCAD的二次开发结构分析软件NosaCad,引入变刚度梁单元和弹簧模型柱单元,建立框架结构空间三维杆系模型,并分别在双向地震波和单向地震波作用下的框架结构进行了弹塑性反应时程分析,得到了结构的自振周期、各层层间位移角和顶层水平位移曲线,并对两组结果进行比较。通过对框架结构的计算,得到框架结构在地震作用下结构的薄弱环节。更多还原

【Abstract】 Using the Elasto-plastic finite element theory and NosaCad structural analysis software that is the secondary development software of AutoCAD,spatial three dimensional truss system model was established.This system adopts the beam element with varied stiffness in different regions and column element with spring model.Based on the analysis of the time-history elasto-plastic response for truss system model under two-dimensional and one-dimensional earthquake excitation,the interbedded displacement angle and horizontal displacement curve were obtained,and two sets of data were compared.Through the analysis of the model,the weak links of the frame structure was got.更多还原