加载角度对斜向受荷桩承载特性影响的数值模拟.pdfVIP

加载角度对斜 向受荷桩承载特性影响 的数值模拟 文松霖王孝兵长江科学院水利部岩土力学与工程重点实验室，武汉 430010 [摘 要]利用数值模拟方法对斜向受荷桩的承载特性进行了分析计算，主要研究加载角度对桩基承载特性影响。结果 表明：(1)随着加载角度的增大，桩身水平位移显著增大；桩的承载方式由竖向承载为主逐渐向水平承载为主转化；(2)随着加 载角度的增大，桩身最大弯矩逐渐增大，发生位置逐渐向深部移动；桩身弯矩的变化主要受荷载水平分量的影响。(3)斜向荷 载下，随着加载角度 θ的增大，桩侧土反力0点位置向深部移动；桩前最大土反力Plmax和桩后最大土反力P2max与sinθ有很好的 线性递增关系；(4)随着加载角度的增大，桩端阻力减小。 [关键词]桩基；有限元；加载角度；斜向荷载；桩侧土反力；桩身弯矩 TU A NumericalSimulationontheImpactofLoadingAngleontheBearingCharacteristics ofPileundertheInclinedLoad WENSong-linWANGXiao-bingKeyLaboratoryofGeotechnicalMechanicsandEngineeringoftheMinistryofWaterResources, YangtzeRiverScientificResearchInstitute,Wuhan430010,China [Abstract]Inthispaper,thebearingcharacteristicsofpilesunderinclinedloadsareanalyzedandcalculatedbynumerical simulationmethod,andtheeffectofloadingangleonthepilebearingcharacteristicsisthemostimportantresearchcontent.Theresults showthat:(1)withtheincreaseoftheloadingangle,pilehorizontaldisplacementisincreasedsignificantly,andthehearingstyleof pileischangedfrommainlybytheverticalbearinggraduallytomainlybythehorizontalbearing;(2)withtheincreaseoftheloading angle,themaximumbendingmomentofpileisincreasesgradually,andthelocationismovedtothedeepgradually.Thebending momentofpileisaffectedbythehorizontalcomponentofload;(3)undertheeffectofinclinedloading,withtheincreaseoftheload angle θ,thepositionofzeroreactionforceofthepileismovedtothedeep.Themaximumsoilanti-forceontheshaftp1maxbeforepile andthemaximumsoilanti-forceontheshaftP2maxafterpilehaveagoodlinearrelationshipwithsinθ;(4)withtheincreaseoftheload angle,thetipresistanceisreduced. [Keywords]pile ; finiteelement ; loadingangle ; inclinedload;soilanti-forceontheshaft ; bendingmoment 增刊1 史松霖，等：加载角度埘斜向受衍静t承载特性影响的数fI{!{模拟 2l 2 有限元计算模型 3计算结果分析 3．1 本