【摘要】 基于瞬态温度场和徐变应力有限元法,对某重力坝加高工程的温度场与应力场进行有限元仿真计算。对老坝体纵向裂缝和新老混凝土接合面的接触问题采用有限元混合法进行模拟,重点分析老坝体纵向裂缝产生的原因,研究坝体加高后对老坝体纵向裂缝以及坝体关键部位的影响,对大坝的加高工程具有一定的参考价值。更多还原

【Abstract】 Based on the finite element method of transient temperature fields and creep stress,finite element simulation analysis of the temperature field and stress field of the heightening process of a gravity dam is carried out.Contacting problems of the longitudinal cracks in the original dam and the adjoining face between old and new concrete are simulated with the mixed finite element method.The causes of longitudinal cracks are analyzed.The effects on the longitudinal cracks in the original dam and the key parts of the dam after heightening are also studied,and provide a certain reference value for other gravity dam heightening projects.更多还原