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考虑双轴水平力耦合效应的RPC箱型桥墩恢复力模型试验研究

, PP. 152-159

Keywords: RPC,滞回特性,骨架曲线,恢复力模型,纤维模型法

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Abstract:

通过3个施加常轴力的RPC箱型桥墩试件的水平反复荷载试验,考虑水平荷载作用方向对RPC箱型墩抗震性能的影响,分析各试件滞回特性和骨架曲线的特点,对影响RPC箱型桥墩恢复力模型的主要因素进行数值回归分析,建立了计入双轴水平力耦合效应的RPC箱型桥墩恢复力模型。利用基于平截面假定的纤维模型法编制考虑轴力二阶效应的双轴压弯构件非线性分析程序,并对RPC箱型桥墩试件的骨架曲线和滞回曲线进行数值模拟。通过与试验结果进行分析对比表明所提出的恢复力模型具有较好的精确性,能够较好地模拟和反映RPC箱型桥墩的抗震性能。

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