基于施工条件的龙滩碾压混凝土重力坝温度应力仿真分析  

Simulation of thermal stress of Longtan RCCD based on construction conditions

作　　者：冯树荣[1,2] 胡志奇[2] 何建平[2] 张怡瑞[2] 

机构地区：[1]河海大学土木工程学院,江苏南京210098 [2]中国水电顾问集团中南勘测设计研究院,湖南长沙410014

出　　处：《河海大学学报（自然科学版）》2009年第1期57-61,共5页Journal of Hohai University(Natural Sciences)

摘　　要：根据龙滩大坝实际施工条件,采用三维有限元模型模拟了大坝浇筑和运行过程中的温度场和应力场,并与大坝原型观测资料进行了对比.结果表明,挡水和泄水坝段最高温度发生在二级配碾压混凝土和变态混凝土区,总体计算结果与实测资料基本一致,绝大多数位置的温度和应力满足设计要求,局部位置略有超标,主要为施工中层厚偏大、浇筑温度偏高引起,但仍然满足安全运行要求.The three-dimensional finite element method was employed to simulate the thermal and stress fields during the pouring and operation of Longtan Roller Compacted Concrete Gravity Dam according to its actual construction conditions. The results were compared with the prototype monitoring data. It is shown that the maximum temperatures of dam retaining and discharging sections lie in the distorted concrete area and the two-graded compacted RCC area. The computed results are in accordance with the measured ones. The temperature and stress situation in most locations can satisfy the design requirements. Although they have a little excess in some locations with thicker layer and high pouring temperature during construction, they can satisfy the requirements of safe operation.

关 键 词：龙滩碾压混凝土重力坝 施工条件 温度应力 仿真 

分 类 号：TV642.2[水利工程—水利水电工程]