2023年第02期总第296期福建建筑FujianArchitecture&ConstructionNo02·2023Vol·296地震激励下某土岩二元结构边坡锚索轴力响应探析卢伟平(福州市城建工程检测有限公司福建福州350001)摘要:以某预应力锚索-框架支护土岩二元结构边坡为依托,借助FLAC3D5.0软件进行地震作用数值模拟,对不同工况的锚索轴力响应进行分析。结果表明,边坡在地震作用下的稳定性与锚索轴力变化过程正相关;地震波强度较小时,由于边坡的自稳作用,在地震惯性力作用下,锚索不但无法发挥抑制作用,反而会出现预应力损失;地震波强度较大时,边坡滑裂趋势位置处的锚索瞬间响应,轴力迅速增大,从而抑制边坡滑移破坏;岩石与土体材料的刚度和阻尼在土体与岩石相交面位置处发生突变,可以判定交界处相对较薄弱或可能为剪出口。关键词:边坡工程;锚框支护;地震动力响应;数值模拟;轴力响应中图分类号:TU47文献标识码:A文章编号:1004-6135(2023)02-0057-06AnalysisofanchorcableaxialforceresponseofasoilrockdualstructureslopeunderearthquakeexcitationLUWeiping(FuzhouCityConstructionEngineeringTestingCo.,Ltd,Fuzhou350001)Abstract:Basedonaprestressedanchorcable-frame-supportedsoil-rockdualstructureslope,numericalsimulationofseismicactioniscarriedoutwiththehelpofFLAC3D5.0software,andaxialforceresponseofanchorcableunderdifferentworkingconditionsisanalyzed.Theresultsshowthatthestabilityofslopeunderearthquakeispositivelycorrelatedwiththechangeprocessofanchorcableaxialforce.Whentheseismicwaveintensityissmall,duetotheself-stabilityoftheslope,theanchorcablecannotplayarestrainingroleundertheactionofseismicinertiaforce,butwillappearthelossofprestress.Whentheseismicwaveintensityislarge,theanchorcableattheslopeslidingtrendrespondsinstantly,andtheaxialforceincreasesrapidly,whichinhibitstheslopeslidingfailure.Thestiffnessanddampingofrockandsoilmaterialchangeattheintersectionofsoilandrock,whichcanbejudgedtoberelativelyweakorshearoutlet.Keywords:Slopeengineering;Anchor-framesupport;Seismicresponse;Numericalsimulation;Axialforceresponse作者简介:卢伟平(1989-),男,高级工程师。E-mail:469222453@qq.com收稿日期:2022-06-140引言地震导致滑坡,是一种较为常见的自然地质...