基于Mindlin解地震作用下压力型锚索的拟静力分析

发布时间：2018-04-15 02:40

本文选题：压力型锚索 + 抗震性能　；参考：《振动与冲击》2017年02期

【摘要】：为了更加精确地研究地震作用下压力型锚索的锚固机理,基于Mindlin解推导出了圆形均布荷载作用下压力型锚索体系中注浆体受到的压应力表达式和注浆体与锚索孔壁之间的剪应力表达式,结合地震作用效应的拟静力简化方法,研究了锚索孔半径、承压板半径、岩土体的泊松比、锚索孔方向与水平线之间的夹角、预应力值大小、地震烈度等因素对压力型锚索加固效果的影响。研究结果表明:锚索孔半径、承压板半径、锚索孔方向与水平线之间的夹角、预应力值大小、地震烈度的影响结果较大,岩土体的泊松比影响结果较小。研究成果丰富了预应力锚索的抗震设计内容,可为边坡加固充分发挥压力型锚索良好的抗震性能提供参考。
[Abstract]:In order to study more accurately the anchoring mechanism of pressure-type anchor cables under earthquake,Based on the Mindlin solution, the expressions of compressive stress and shear stress between the grouting body and the hole wall of the anchor cable under circular uniform load are derived, and the pseudostatic simplified method combined with the seismic effect is derived.The influences of the radius of anchor cable hole, the radius of confined plate, the Poisson's ratio of rock and soil mass, the angle between the direction of anchor cable hole and horizontal line, the value of prestress and seismic intensity on the reinforcement effect of pressure-type anchor cable are studied.The results show that the radius of anchor cable hole, the radius of bearing plate, the angle between the direction of anchor cable hole and horizontal line, the magnitude of prestress, the seismic intensity have great influence on the results, but the Poisson's ratio of rock and soil is less.The research results enrich the aseismic design content of prestressed anchor cables and can provide a reference for slope reinforcement to give full play to the good seismic performance of pressure-type anchor cables.
【作者单位】：武汉理工大学土木工程与建筑学院;武汉交通职业学院交通工程学院;武汉大学土木建筑工程学院;
【基金】：国家自然科学基金面上项目(51374163) 湖北省自然科学基金面上项目(2014CKB499)
【分类号】：TU476;TU435

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