大跨空间钢结构罕遇地震反应分析

以中国浦东干部学院大跨空间钢结构为工程背景，采用三维弹塑性有限元模型对其在罕遇地震作用下进行弹塑性时程分析，得出了大跨空间钢结构在地震作用下的受力变形特点。分析结果表明强震初期的冲击对于大跨空间结构的动力破坏起着重要作用，地震波的选取应必须包括实际强震记录调整后拟和设计反应谱的加速度时程。结构地震反应在水平方向具有明显的变异性，而且这一特点对于结构的抗震设计起到控制作用。

Seismic Response Analysis of Long Span Steel Structures under Strong Earthquake

Elasto-plastic time-history analysis of long span steel structures is carried out by taking Cadre Academy of China Pudong as an example under strong earthquakes. 3 - D elasto-plastic FEM is proposed to obtain mechanical transmutation characteristic. It is pointed out that in the case of a very strong earthquake the study of the initial transient behavior under the initial violent impact is very important in determining the dynamic failure. Strong ground motion records, which response spectrum is accordance with the designed response spectrum, should be included. Seismic responses show obvious spatial variation in horizontal direction.