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柔性加固失稳重力式挡土墙的动静力稳定性分析

Engineering mechanics(2015)

Cited 6|Views2
Abstract
针对地震区重力式挡土墙地震后多数出现不稳定的现象和由于挡土墙工作条件改变产生失稳的事故,采用框架预应力锚杆柔性加固技术对失稳重力式挡土墙进行加固是一种非常有效的加固方法;但是,由于该加固方法系作者首先提出并在工程中使用,其稳定性分析方法,特别是地震动力稳定性分析方法是迫切需要解决问题.该文以极限平衡理论为基础,对柔性加固后重力式挡土墙进行整体静力稳定性分析,推导出挡土墙的抗倾覆稳定性和抗滑移稳定性计算公式;通过分析给出了地震动力计算模型,分析了地震动力作用,采用振型分解法给出地震动力作用下地震作用和锚杆拉力计算公式,并采用极限平衡法给出动力稳定性计算公式.
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Key words
frame prestressed,instability gravity retaining wall,seismic reinforcement,stability coefficient,movement stability
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