SMP破坏准则在地基承载力计算中的应用  

APPLICATION OF SMP FAILURE CRITERION TO CALCULATION OF BEARING CAPACITY OF FOUNDATION

作　　者：彭新坡[1] 刘航[1] 杨学中[1] 吴文奇[1] 

机构地区：[1]北京市建筑工程研究院有限责任公司,北京100039

出　　处：《工业建筑》2013年第S1期526-528,540,共4页Industrial Construction

基　　金：北京市建工院青年科技基金项目(KJ201214)

摘　　要：基于SMP破坏准则和佐武的平面应变条件,推导出了无黏性材料的平面应变破坏公式。通过引入黏聚力σ0,推导出了适用于黏性材料的平面应变破坏公式。将该公式引入到地基承载力的计算当中,推导出了基于SMP破坏准则的地基承载力计算公式。将此地基承载力的计算公式得到的计算结果与试验数据进行了对比,结果表明:基于SMP破坏准则的地基承载力值比使用Mohr-Coulomb破坏准则计算的承载力值大。这说明考虑中间主应力的影响效应对于提高地基承载力具有一定的实际意义,可以很好地发挥土体材料的强度。Based on the SMP failure criterion and Satake’s stress condition in plane strain state,the failure criterion in plane strains for cohesionless material was deduced.By introducing a parameter of bonding stress σ0 the failure criterion is extended to that for cohesive-frictional materials.Applying it to the calculation of bearing capacity of foundation,the calculating formula of bearing capacity of foundation was deduced based on the SMP failure criterion.Comparing the calculating results with the test data,it is shown that the bearing capacity value of foundation bases on the SMP failure criterion is lager than the value based on the Mohr-Coulomb failure criterion.So considering the influence of the intermediate principal stress is helpful to increase the bearing capacity of foundation,which can sufficiently develop the potential strength of soil material.

关 键 词：SMP破坏准则 平面应变 地基承载力 中间主应力 

分 类 号：TU432[建筑科学—岩土工程]