CAJ | 학술논문

在深入分析可靠度指标的几何意义和响应面法的基本思想的基础上，提出了基于 ANSYS 和响应面法的可靠度算法与步骤。分析了陕西省吴起县大路沟巨型黄土滑坡的工程地质条件，根据滑坡的工程地质勘察资料和滑坡治理工程的设计资料，建立了基于 ANSYS 的抗滑桩桩土体系有限元模型，经过自重作用下桩土结构有限元分析，验证了该有限元模型的有效性。在此基础上，选取滑体土重度γ、滑面土内聚力 c 和内摩擦角φ、滑面以下土的压缩模量 Es 4个随机变量，基于响应面（中心复合设计 CCD）法和通用有限元软件 ANSYS 平台，建立了抗滑桩的可靠度分析模型，并研制了对应算法。工程算例结果表明：当试验点数量 N＝25时，抗滑桩结构的失效概率 Pf＝0．35％，可靠度指标β＝2．70，从而验证了基于 ANSYS 和 CCD 响应面法建立抗滑桩可靠度计算模型及算法是可行的。
재심입분석가고도지표적궤하의의화향응면법적기본사상적기출상，제출료기우 ANSYS 화향응면법적가고도산법여보취。분석료합서성오기현대로구거형황토활파적공정지질조건，근거활파적공정지질감찰자료화활파치리공정적설계자료，건립료기우 ANSYS 적항활장장토체계유한원모형，경과자중작용하장토결구유한원분석，험증료해유한원모형적유효성。재차기출상，선취활체토중도γ、활면토내취력 c 화내마찰각φ、활면이하토적압축모량 Es 4개수궤변량，기우향응면（중심복합설계 CCD）법화통용유한원연건 ANSYS 평태，건립료항활장적가고도분석모형，병연제료대응산법。공정산례결과표명：당시험점수량 N＝25시，항활장결구적실효개솔 Pf＝0．35％，가고도지표β＝2．70，종이험증료기우 ANSYS 화 CCD 향응면법건립항활장가고도계산모형급산법시가행적。
This paper is based on the in-depth analysis of the geometric meaning of reliability index and the basic idea of response surface method.It proposes the algorithm steps of reliability index on the basis of ANSYS and response surface method.The engineering geological conditions of Dalugou loess landslide in Wuqi County Shaanxi Province are analyzed.According to the landslide geological survey data and design information of landslide remediation engineering,the finite element model of anti-slide pile soil system is established on ANSYS software platform.The numerical simulation results of pile and soil system under own weight condition prove the validity of the finite element model.Moreover,the density γof landslide,the cohesion c,the internal friction angle φof slide surface,and the compression modulus Es of sliding bed are screened as random variables.The reliability calculation model of anti-slide pile is developed using ANSYS software and CCD responding surface method.The corresponding algorithm is developed.The sample calculation shows that,when the number of test point N equals to 25,the probability of failure of anti-slide pile structure Pf =0.35% and β=2.70,which verifies the feasibility of establishing the reliability model and corresponding algorithm with ANSYS and CCD response surface method.