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Pushover加载模式对圆形双柱墩地震反应的影响

DOI: 10.13197/j.eeev.2015.03.94.zhangsw.012, PP. 94-99

Keywords: 桩-土-结构相互作用(PSSI),侧向力模式,轴压比,pushover分析,非线性时程分析

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Abstract:

为考察pushover侧向力模式对桥墩地震反应的影响,以圆形双柱墩模型为例,进行了6个地震动作用下的非线性时程分析和4种常用侧向力加载模式的pushover分析,并以时程分析结果的平均值作为对比基准。研究表明,不同侧向力加载模式计算结果存在一定差异,静力法计算结果误差最大;给定振型下的模态法误差较小,在不同轴压比下的计算结果分布规律与时程法的吻合最好;常量加速度法的误差基本介于前述两种模式之间;M-phi曲线法的误差随着轴压比的增大而变大;与时程法相比,模态法的计算结果比其它方法更为合理。

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