岩土工程技术
巖土工程技術
암토공정기술
GEOTECHNICAL ENGINEERING TECHNIQUE
2009年
4期
167-171
,共5页
极限平衡%圆形浅基础%承载力%有限元
極限平衡%圓形淺基礎%承載力%有限元
겁한평형%원형천기출%승재력%유한원
limit equilibrium%circular shallow foundation%bearing capacity%finite element
通过假定地基发生整体剪切破坏,给出滑动破坏面,考虑地基土的塑性平衡区随着基础埋置深度的不同而扩展到最大可能的程度,并且计及基础两侧土的抗剪强度对承载力的影响,采用极限平衡法,理论上推导出了圆形浅基础承载力.结合工程实例,并利用有限元程序(ADINA)进行数值模拟,进一步验证了浅基础破坏模式的正确性,以及理论推导的可靠性.
通過假定地基髮生整體剪切破壞,給齣滑動破壞麵,攷慮地基土的塑性平衡區隨著基礎埋置深度的不同而擴展到最大可能的程度,併且計及基礎兩側土的抗剪彊度對承載力的影響,採用極限平衡法,理論上推導齣瞭圓形淺基礎承載力.結閤工程實例,併利用有限元程序(ADINA)進行數值模擬,進一步驗證瞭淺基礎破壞模式的正確性,以及理論推導的可靠性.
통과가정지기발생정체전절파배,급출활동파배면,고필지기토적소성평형구수착기출매치심도적불동이확전도최대가능적정도,병차계급기출량측토적항전강도대승재력적영향,채용겁한평형법,이론상추도출료원형천기출승재력.결합공정실례,병이용유한원정서(ADINA)진행수치모의,진일보험증료천기출파배모식적정학성,이급이론추도적가고성.
This article assumes that the overall foundation shear damage happened, the sliding surface damage is given, the greatest possible expansion extent of the soil plasticity balance area with the variety of foundation embedment is considered, and both sides of the foundation soil shear strength are taken into account. Circular shallow foundation bearing capacity is theoretically derived with Limit equilibrium method. Using practical engineering examples and numerical simulation with finite element program (ADINA), the correctness of shallow foundation damage model and theoretical derivation are further validated.