卡洛特水电站埋藏式压力钢管联合受力研究
Yangtze River（2022）
Abstract
考虑钢管与围岩联合承载,采用有限元对钢管、回填混凝土与围岩组成的联合承载体进行了非线性的计算分析,将有限元计算结果与规范计算结果进行了对比,比较了内水压力、围岩与钢管缝隙等因素对钢管受力特性及围岩分担率的影响.研究表明:不同的内水压力下,围岩分担率不同,一般随内水压力的增加而减小.缝隙影响围岩的分担率,缝隙越小,围岩分担的内水压力就越大;当缝隙超过一定值时,钢管接近明管的受力状态.回填混凝土采用弹塑性断裂本构模型的实体单元模拟能较好地反映材料的力学性能,宜采用该方法对埋藏式压力钢管进行受力分析与工程设计.
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