带锚栓的加劲板式橡胶支座使用阶段的水平刚度

来源 :建筑结构学报 | 被引量 : 0次 | 上传用户:misswj2009
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在大跨度柱支承钢网格结构的橡胶支座中设置锚栓,能有效防止屋盖在极端情况(如罕遇地震、负风压)下脱离出支承柱.为了不妨碍橡胶垫在正常使用条件下变形,在锚栓和锚孔之间留有与该变形相适应的净距.本文分析这类支座在橡胶垫与锚栓接触前后的水平刚度.与支座变形相一致,进行了接触问题的近似分析,得到了一个便于计算机编程的刚度函数算式.一个四柱支承大跨度预应力浅网壳结构的有限弹性变形分析表明,锚栓对计算结果影响较大.
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