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在简要介绍了位移模型有限元法计算刚性路面荷载应力的一般概念后,本文对于S.K.Wang与Y.K.Chueng最先提出的半空间地基假定下刚性路面荷载应力有限元分析中所采用的地基反力处理方法提出一些不同的看法。作者认为采用集中反力法不符合荷载移置的静力等效原则,并且地基反力的分块方法也不够妥当。木文提出以均布反力代替集中反力进行应力计算。通过计算结果的对比分析,证明均布反力法更为合理。此外,本文对于面积相等的圆形均布菏载与方形均布荷载的计算结果进行了比较,证明二者是等效的,可以相互置换。
After briefly introducing the general concept of displacement model finite element method for calculating the rigid pavement load stress, this paper applies the foundation reaction force processing in the finite element analysis of rigid pavement load stress given by SK Wang and YK Chueng under the assumption of half-space foundation firstly. The method proposes some different opinions. The author believes that the use of the concentrated reaction force method does not meet the static equivalence principle of load displacement, and the method of segmentation of the ground reaction force is not adequate. Mu Wen proposed to use uniform counter force instead of concentrated counter force for stress calculation. Through the comparative analysis of the calculation results, it is proved that the uniform distribution reaction method is more reasonable. In addition, this paper compares the calculation results of uniform and uniform distribution loads for round and equal areas with equal area, and proves that the two are equivalent and can be replaced with each other.