论文部分内容阅读
该文应用塑性-损伤耦合模型和钢筋刚化方法,分别模拟混凝土损伤开裂和钢筋-混凝土相互作用效应,然后基于仿真计算分析梁向配筋前后高拱坝的地震非线性响应,研究该抗震措施的加固效果。仿真分析显示,梁向配筋措施可以降低强震下拱坝横缝张开位移与顶拱相对变形,减小坝体中上部开裂区域的裂缝张开位移,限制沿坝厚方向的裂缝扩展范围,有助于提高拱坝的抗震安全性能。然而,建议配筋方案的加固效果仍不能满足工程要求,特别是坝踵区域开裂严重,直接威胁拱坝整体安全,而梁向偏配筋措施对限制坝踵开裂的效果不显著;同时,上游配筋范围未能完全覆盖开裂区域,应对建议配筋方案进行改进和优化。
In this paper, the plastic-damage coupling model and steel rigidification method are used to simulate the concrete damage and steel-concrete interaction respectively. Then the nonlinear response of the high arch dam before and after the reinforcement is analyzed based on the simulation. The reinforcement effect. Simulation analysis shows that the reinforcement measures can reduce the open displacement of transverse joints and the relative deformation of roof arch under strong earthquake and reduce the crack opening displacement in the upper cracking area of the dam and limit the crack propagation range along the dam thickness , Help to improve the seismic safety of arch dam. However, it is suggested that the reinforcing effect of the reinforcement scheme still can not meet the engineering requirements. In particular, the crack in the heel area is serious, which directly threatens the overall safety of the arch dam. However, the effect of the beam-oriented reinforcement on the dam heel cracking is insignificant. Meanwhile, Reinforcing range fails to completely cover the cracking area, the proposed reinforcement program should be improved and optimized.