竖向地震动对基础隔震结构高宽比限值的影响

Effect of Vertical Motion on Limit Ratio of Height to Width for Isolated Structure

在有关文献的基础上,重点分析了竖向地震动对橡胶支座隔震结构的高宽比限值Rh/w的影响,并考虑了场地条件、地震强度、隔震周期等因素和竖向地震动的综合影响.分析结果显示,对于坚硬场地条件,必须考虑竖向地震动对Rh/w的影响;而对于软场,则不然.为了方便工程应用,首次给出了考虑水平和竖向地震动、地震动强度以及场地条件等因素影响的Rh/w的定量取值.结果可为橡胶支座隔震结构的设计和相应规范的编制提供参考.

In this paper,the effect of vertical component of earthquake on the limit ratio of height to width of isolated structure is analyzed, which is the continual work of literature. Meanwhile, some other affecting factors are considered altogether. As conclusions shown, the effect of vertical component of earthquake should be considered for hard site while it is not the case for the soft site. A valuable table of limit ratio, which is convenient for designers to use,is provided as one of the conclusions of this paper. The conclusions derived from this paper can be references for isolated structure designing and the establishment of related codes.