隔震设计分析及隔震结构变形缝设置探讨

Analysis of Isolation Design and the Discussion on the Set of Deformation Joint for Isolation Structure

为研究隔震结构设置对整体结构抗震性能的影响,以实际工程中四川卧龙一贯制学校中学部教学楼结构隔震设计为例,采用SAP2000软件对结构进行整体非线性动力时程分析,在多遇地震和罕遇地震作用下对隔震结构和非隔震结构进行对比分析.分析结果表明:多遇地震作用下隔震结构的层间剪力、加速度和层间位移较非隔震结构均有大幅度降低,其中X向、Y向最大层剪力分别降低了78%,和79%,;X向、Y向楼层最大加速度分别降低了60%,和52%,;X向、Y向最大层间位移分别降低了75%,和85%,.此外,罕遇地震作用下设置隔震结构也能明显减小结构的地震反应,改善结构的抗震性能.同时还对隔震结构变形缝的设置进行了探讨,为相关工程提供参考.

In order to investigate the effect of isolation structure design on the seismic performance of the overall structure, comparative analysis of the isolated structure and non-isolated structure under frequent and rare earth- quakes has been conducted, which is based on the isolation design for middle school teaching building of Sichuan Wolong consistent system. The nonlinear dynamic history analysis of the whole structure has been carried out by means of the software SAP2000. According to the analysis results, the interlayer shear, acceleration and interlayer drift of isolation building are considerably smaller than the non-isolated structure under frequent earthquake. The larg- est interlayer shears of X direction and Y direction have reduced by 78% and 79%, the largest accelerations of X di- rection and Y direction have reduced by 60% and 52% and the largest interlayer drifts of X direction and Y direction have reduced by 75% and 85%, respectively. Besides, the isolated structure could significantly reduce the seismic response and improve the seismic performance of the structure under rare earthquake as well. In addition, the set of deformation joint for isolation structure has been discussed, which can provide a reference for related engineering.