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悬臂式挡墙系统模态试验研究

Keywords: 道路工程,模态试验,模态分析,悬臂式挡墙,质量检测,抗震设计,脉冲激励

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Abstract:

针对悬臂式挡墙开孔取样质量检测法效率低,代表性差,且破坏墙体整体性及由于墙土系统动力特性研究不足而致使其抗震设计困难的问题,对研究结构动力特性从而具有质量评估和抗震优化设计功能的模态分析理论在挡墙系统中的应用进行了分析。为探讨墙后土体对挡墙结构模态的影响,在挡墙墙体结构有限元模态分析的基础上,对墙土系统进行了现场模态试验的设计、测试和数据处理,获得了系统模态参数,经分析得出墙后土体作用下墙体振型的不变性及频率变化等特征,总结了挡墙低频中型岩土结构系统变时基脉冲锤击试验模态测试成功所必须的主要技术措施。

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