不同锚固方式边坡地震响应与动力有限元稳定分析  

Seismic response and dynamic finite element stability analysis for the different anchorage slope

作　　者：王桂萱[1] 刘道勇[1] 赵杰[1] 

机构地区：[1]大连大学土木工程技术研究与开发中心,大连116622

出　　处：《辽宁工程技术大学学报（自然科学版）》2015年第11期1234-1239,共6页Journal of Liaoning Technical University (Natural Science)

基　　金：辽宁省教育厅科学研究一般项目(2012-0102517);大连市科学技术基金项目(2010J21DW013)

摘　　要：为探究地震作用下,边坡不同锚固方式支护效果的差异,考虑锚杆支护与锚杆+预应力锚杆复合支护两种锚固方式,建立三维边坡模型,分析边坡位移、加速度响应、以及锚杆的受力特征.按照平面应变问题考虑边坡稳定性,得到两种锚固方式下边坡安全系数时程曲线.结果表明:复合支护较锚杆支护可更有效限制边坡的变形和坡面峰值加速度PGA放大系数,两种锚固方式锚杆受力特性有所差异.相同地震动作用下,复合支护边坡安全系数较锚杆支护得到提高.Taking the anchor support and the anchor support composite with prestressed anchors for example, three-dimensional slope models were built to explore the support effect of different anchorage under earthquake action, which analyzed the displacement and acceleration response of the slope as well as the stress of the bolt. The slope stability is considered according to the plane strain problem to get time-history curve of slope safety factor of the two support methods. It is concluded that composite support structure can effectively limit the slope deformation and inhibit PGA amplification factor of the slope and the axial force of the anchor is different from that of the anchor support. Under the same earthquake, slope safety coefficient of the composite support is better than the anchor support.

关 键 词：锚固边坡 地震响应 锚杆轴力 安全系数 稳定分析 

分 类 号：TU457[建筑科学—岩土工程]