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橡胶隔震支座建筑隔震层位移幅值分析
Analysis of the Maximum Displacement of Isolation Layer for Base-isolated Buildings with Rubber Bearings
【摘要】 对橡胶隔震支座建筑采用多质点层间等效剪切模型,通过动力时程分析,研究了影响隔震层位移幅值变化的各种因素·结果表明,场地类别,地震烈度,隔震后结构基本周期,隔震层等效阻尼比是影响位移幅值的主要因素,隔震建筑在一类场地上位移幅值最小,通过调整隔震层的等效阻尼比可以有效控制位移幅值·建造在一,二和三类场地上的低层和多层规则型橡胶隔震支座建筑,通过对大量动力分析结果采用多元回归分析方法,得出罕遇地震作用下隔震层位移幅值简化计算公式,精度满足工程设计的要求·
【Abstract】 Through an equivalent interlaminar shear model with multidegree of freedom for baseisolated buildings with laminated rubber bearings, the maximum displacement of isolation layer is discussed, adopting dynamical timehistory analysis. The results show that the influencing factors on the maximum displacement of isolation layer are mainly the site classification, earthquake intensity, structural period of baseisolated building and equivalent viscous damp ratio. It was found that the amplitude of displacement of isolation layer is minimum in the site classⅠand adjusting the damp ratio can control efficiently the amplitude of displacement. By way of regression analysis, a simplified calculation formula of maximum displacement of isolation layer is provided for regular baseisolated buildings of low and multi-storey in site classⅠ,Ⅱ and Ⅲ, of which the accuracy will meet the requirements of engineering design.
【Key words】 base-isolation buildings; laminated rubber bearings; maximum displacement; isolation layer; time-history analysis; regression analysis;
- 【文献出处】 东北大学学报 ,JOURNAL OF NORTHEASTERN UNIVERSITY , 编辑部邮箱 ,2003年11期
- 【分类号】TU352.1
- 【被引频次】7
- 【下载频次】273