DP盖帽混凝土本构模型二次开发及边坡加固工程应用

基于有限元计算软件的二次开发技术,提出一种新型的DP盖帽混凝土本构模型,并结合某边坡置换洞加固工程实例,建立其边坡潜在滑块三维有限元模型,分别采用DP模型与DP盖帽模型分析置换洞的弹塑性破坏程度,对比分析评价其加固效应。研究发现:新开发的DP盖帽模型可成功应用于软件计算中;采用DP模型计算所得安全系数约1.45,采用DP盖帽模型计算所得安全系数约1.41,说明在置换洞加固后存在部分双轴压坏和少量三轴压坏情况,且证明DP盖帽模型能够比DP模型更为精准地考虑混凝土破坏情况,可以为类似工程提供参考依据。

Secondary Development of DP Cap Concrete Constitutive Model and Its Application in Slope Reinforcement Engineering

Based on the secondary development technology of the finite element calculation software,a new kind of DP cap concrete constitutive model is proposed.And combined with a slope replacement hole reinforcement engineering practice,the slope three-dimensional finite element model of potential slide is established,DP model and DP cap model are used respectively to analyze the elastic-plastic damage degree of the replacement hole,and its reinforcement effect is contrasted,analyzed and evaluated.The study is found that the newly developed DP cap model can be successfully used in software calculation.The safety factor calculated by DP model is about 1.45,and the safety factor calculated by DP cap model is about 1.41.The results show that partial biaxial compression failure and a few triaxial compression failure exist after the replacement hole is strengthened,and it proves that the DP cap model can more accurately consider the concrete damage condition than DP model,which can provide the reference basis for the similar projects.