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正确评价水工建筑物中广泛存在的结构缝对建筑物安全性的影响是一个很难的课题。该文介绍一种新型的、稳定的接触问题的求解方法——直接约束法。该方法实时跟踪接触体的变形,直接对自由度施加运动约束条件或结点力,不需要定义接触单元。对水口水电站厂坝联接缝进行了三维接触计算分析,得出了水压力作用下厂坝间相互传递的推力与联接缝宽度间的关系。说明了直接约束法使用简单,可以方便地应用于水工接触分析。
It is a difficult task to correctly evaluate the influence of structural joints existing in hydraulic structures on the safety of buildings. This paper introduces a new and stable solution to the problem of contact - the direct constraint method. The method can track the deformation of the contact body in real time and directly exert the motion constraint or knot force on the degree of freedom. There is no need to define the contact unit. Three-dimensional contact analysis of Shuikou hydropower plant joints was carried out. The relationship between the thrust and the joint width under the action of water pressure was obtained. It shows that the direct constraint method is easy to use and can be easily applied to hydraulic contact analysis.