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考虑高阶振型push-over分析与应用

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摘要 对于中、低桥墩采用传统的push-over分析方法是可行的。然而对于高墩,由于其具有截面尺寸大、结构周期长、墩身质量大等特点,忽略桥墩自身的惯性力以及高阶振型的贡献会导致较大的误差。为了考虑高阶振型的影响,采用模态push-over分析方法对独立桥墩模型进行了分析,结果表明:模态push-over分析方法所得结果与时程分析方法结果吻合较好。在计算中,可根据振型参与系数初步判断高阶振型的影响,恰当选择少量的振型从而获得较好的结果,以便减少计算工作量。
出处 《甘肃科技》 2010年第9期51-53,115,共4页 Gansu Science and Technology
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