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针对闸坝厂房下游段混凝土体积较大及受底部老混凝土约束的特点,对混凝土施工期温度和应力进行了仿真研究.依托某闸坝工程,根据闸坝厂房下游段混凝土的结构特点和施工方法,进行三维有限元建模,并采用三维不稳定温度场和应力场仿真计算理论,进行仿真计算,主要考查施工期的温度和应力变化及分布情况.结果表明,闸坝厂房下游段混凝土早期表面产生较大拉应力,具有较大的开裂风险,是防裂的重点.
According to the characteristics of larger volume of concrete in the downstream section of sluice dam and restrained by the old concrete at the bottom, the temperature and stress of concrete during construction are simulated. According to the construction of a sluice dam, according to the structural characteristics and construction method , Three-dimensional finite element modeling, and the use of three-dimensional temperature field and the stress field simulation theory, simulation calculation, mainly to examine the temperature and stress during construction and distribution changes.The results show that the dam early stage concrete surface Have a greater tensile stress, with a greater risk of cracking, crack prevention is the focus.