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新型梁柱-钢管混凝土板柱混合结构试验研究

Keywords: 梁柱-钢管混凝土板柱,混合结构,模型试验,竖向承载力,抗侧移能力

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Abstract:

新型梁柱-钢管混凝土板柱混合结构的特点是钢管混凝土柱-板节点处只承担竖向荷载,不出现或者出现较小的不平衡弯矩,同时提高节点抗侧移能力,避免地震时楼板发生冲切破坏,水平荷载则全部由抗震墙和梁柱框架承担.通过1个1/2比例钢筋混凝土梁柱-钢管混凝土柱无梁楼盖异型板(跨数少于3跨)结构模型试验,研究其在受竖向均布荷载和水平荷载作用下结构的受力性能.试验结果表明,楼盖系统的竖向承载力超出设计荷载的2倍以上,具有较高的安全储备;在重力荷载产生的剪力与板抗冲切承载力的比值(gravityshearratio,GSR)超过0.8时,弹塑性层间位移角限值不小于2.25%,满足中国《建筑抗震设计规范》(GB50011—2010)中大震下结构侧移的要求,优于普通的无梁楼盖系统.

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