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地震作用下城市立交抗震挡防撞措施分析

, PP. 49-53

Keywords: 桥梁工程,抗震挡块,非线性时程分析,防撞措施,地震作用

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Abstract:

?为了明确地震作用下抗震挡前设置防撞装置对结构抗震性能的作用,通过非线性时程反应分析,应用接触单元对比了城市立交中抗震挡设置了防撞装置后的结构抗震性能。由有防撞装置单墩模型参数分析以及一联简支梁设置与不设置防撞装置模型的对比分析可知:防撞装置的最大容许变形量是防撞效果的重要控制参数,在抗震设计中应综合考虑结构碰撞刚度、防撞装置可以提供的变形量以及构造许可等因素。

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