基于-Ansys-的滑坡抗滑桩动力特性的有限元分析.docx

基于Ansys的滑坡抗滑桩动力特性的有限元分析

於文欢;姚天宝;任建民

【摘要】ThefiniteelementcalculationsoftwareAnsyswasusedtodevelopathree-dimensionalmodelofalandslide.Therepre-sentativerangeofKobeearthquakewavewasselectedtoinvestigatethedistributioncharacteristicsoflateralstress,soilpres-sure,andbendingmomentoftheanti-slidepile.Theresultsshowedthatthelateralstressoftheanti-slidepileissignificantun-derearthquakes,whichmayhaveafavorableimpactontheanti-seismicperformanceofthepile;thebendingmomentoftheanti-slidepileshowsinthe/convex0shapeanditreachesthemaximuminthelandslideareaduringtheearthquake;andtheoccur-renceofnegativemomentcanhaveanadverseimpactontheanti-seismicperformanceofthepile.%采用Ansys有限元计算软件，以某滑坡体为例，建立了有限元的三维模型，并选取Kobe地震波中的代表性波段，研究了在地震作用下抗滑桩的侧面应力、动土压力以及桩身的弯矩分布规律。结果表明：在地震作用下，抗滑桩侧面受到不可忽略的侧面应力，对其抗震能力产生有利影响；地震时，抗滑桩产生的弯矩呈现/凸0形，在滑坡带部位达到最大；同时还出现负弯矩，对抗滑桩的抗震不利，在设计时应加以考虑。

【期刊名称】《南水北调与水利科技》

【年(卷),期】2014(000)005

【总页数】4页(P54-57)

【关键词】Ansys;地震作用;边坡稳定;抗滑桩;动力响应;侧面应力;有限元

【作者】於文欢;姚天宝;任建民

【作者单位】兰州交通大学土木工程学院，兰州730070;甘肃省道路桥梁与地下工程重点实验室，兰州730070;兰州交通大学土木工程学院，兰州730070;兰州交通大学土木工程学院，兰州730070

【正文语种】中文

【中图分类】TU435

Abstract:ThefiniteelementcalculationsoftwareAnsyswasusedtodevelopathree-dimensionalmodelofalandslide.TherepresentativerangeofKobeearthquakewavewasselectedtoinvestigatethedistributioncharacteristicsoflateralstress,soilpressure,andbendingmomentoftheanti-slidepile.Theresultsshowedthatthelateralstressoftheanti-slidepileissignificantunderearthquakes,whichmayhaveafavorableimpactontheanti-seismicperformanceofthepile;thebendingmomentoftheanti-slidepileshowsinthe“convex”shapeanditreachesthemaximuminthelandslideareaduringtheearthquake;andtheoccurrenceofnegativemomentcanhaveanadverseimpactontheanti-seismicperformanceofthepile.

Keywords:Ansys;earthquake;slopestability;anti-slide