基于现场实验的墩墙混凝土真实温度应力性态及开裂机理分析

Analysis of real temperature stress characteristic and crack mechanism in pier-wall concrete based on in-situ test

本文依托某一水闸工程现场观测的温度和气候资料,采用优化遗传算法并结合精确的水管冷却迭代算法对混凝土的特性参数进行了反演分析。结果表明,反演所获取混凝土特性参数能较好体现工程实际情况。在此基础上,实现了墩墙混凝土温度真实应力性态的仿真计算,深入剖析了导致闸墩结构出现"枣核形"裂缝的主要影响因素及其开裂机理,提出了相应的温控防裂措施,为确保本工程后继施工不出现裂缝提供了重要的保证。

According parameters is put on iterative procedure of to the in-situ t of temperature and weather, back analysis of characteristic the constructional sluice based on the optimized genetic algorithm and the strict numerical cooling-pipe. The results of back analysis show that the computational results have a good agree with the measurements and the parameters are reliable. Based on the preceding work, simulation computation has been done to understand the actual stress characteristic, to ensure the sluice engineering without crack in the later work, the main factors and its mechanism would lead to the latent crack. Some measurements of temperature controlling and crack protecting are presented, which also provide an effective method to solve the problem of temperature crack.