隔震技术在高烈度区剪力墙结构中的应用研究

对于近断层处高烈度区高层剪力墙结构,传统设计难以解决墙体太厚、配筋太大等难题。为研究在考虑近断层影响下高烈度区剪力墙住宅采用隔震设计的技术可行性,采用隔震设计对某剪力墙结构工程进行全面分析。对比分析常规剪力墙结构方案及增设橡胶隔震支座的隔震方案,分析结果表明,隔震方案较常规方案前3阶结构自振周期延长约3倍,从而有效减小了上部结构的地震作用;在设防烈度地震作用下,结构水平向减震系数为0.281,上部结构所受水平地震作用和抗震措施可按降低一度进行设计;罕遇地震作用下隔震支座性能稳定,上部结构基本处于弹性工作状态。研究结论可为隔震支座设计和进一步研究提供参考。

Application Study of Seismic Isolation Design on A Shear Wall Structure in High Intensity Area

For the high-rise shear wall structure with high intensity near the fault, the traditional design is difficult to solve such problems as "the wall is too thick and the reinforcement is too big". In order to study the technical feasibility of adopting seismic isolation design for shear wall structures in high intensity area considering the influence of fault, a comprehensive analysis and comparison were made on the seismic isolation design of a shear wall structure project. Through the comparative analysis of the conventional frame structure scheme and the isolation scheme with rubber isolation support, the isolation scheme extends the first three order period of the structure by over 2.7 times under the action of earthquake. And it can effectively reduce the seismic action of the structure. Under the seismic fortification intensity, the horizontal damping coefficient of the structure is 0.281. The horizontal seismic action and the seismic measures of the superstructure can be reduced by one degree. Under the action of rare earthquake, the performance of isolation support is stable and the superstructure is in elastic working state. The results can provide reference for the design and further research of isolation bearing.