双向地震影响下抗震和减震结构变形的比较

Comparison of Deformation Between the Isolation Structure and the Anti Seismic Structure Under the Earthquake in two Horizontal Directions

为比较在同时考虑两个水平方向地震影响的情况下，多层框架抗震结构和橡胶垫减震结构变形的区别，采用空间杆系模型在弹塑性范围内对结构进行了动力分析·介绍了进行动力分析的方法，计算了两种结构在地震波作用下各层的层间位移等地震反应·从动力反应的比较可见，减震结构采用橡胶隔震垫后，改善了结构的动力特性，从而使整个上部结构的地震反应大大降低；在同时考虑两个水平方向地震作用时更能体现出减震结构相对抗震结构的优越性·

The dynamic analysis of the isolation structure using rubber bearing and the anti seismic structure was carried out in elastic plastic range with inter space shaft model in order to compare their differences in deformation behaviour under the earthquake in two horizontal directions simultaneously. The displacement responses of each floor under the earthquake wave were calculated. Comparing the results of the isolation structure and the anti seismic structure, it is found that dynamic characteristics of the isolation structure is better and its earthquake response is much less. The isolation structure shows ever a more significant advantage over the anti seismic structure if the collective effect of earthquake force along two horizontal directions is applied.