Simulation Calculation of RCC Ach Dam Stress Based on Three-Demsional FEM

In order to prevent dam cracking caused by local excessive tensile stress,based on the basic principle of arch dam temperature field and temperature creep stress field,three-dimensional finite element method is used to simulate temperature field and stress field of arch dam in construction period and operation period by taking Shankouyan hydro-junction dam across river project in Pingxiang city of Jiangxi Province for an example.Owing to not taking measures for control of temperature and setting joint in dam design and construction,the tensile stress of the dam is large and it exceeds the tensile strength of roll compacted concrete,which is unfavorable for crack control of dam stability.According to the calculation results,the high tensile stress area of the dam can be improved by setting transverse joints and induced joints,and taking measures for temperature control.At the same time,it indicates that the effect of stress release is extremely significant and the maximum tensile stress is less than the tensile strength of roll compacted concrete,which is favorable for crack control of the dam.Thus,it provides guarantee for dam stability.