根据温降内力与水平水压力内力的关系，解释温降对应力不利，温升对应力有利的原因。 -题库考试答案搜索网

根据温降内力与水平水压力内力的关系，解释温降对应力不利，温升对应力有利的原因。

问答题

2022-03-04 16:34

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正确答案

温降时：
拱坝的轴线缩短，向下游变位，由此产生的剪力、弯矩的方向与水压力产生的剪力、弯矩的方向相同；轴力的方向与水压力产生的方向相反，对坝体应力不利。
温升时：
拱坝的轴线伸长，向上游变位，由此产生的剪力、弯矩的方向与水压力产生的剪力、弯矩的方向相反，轴力的方向与水压力产生的方向相同，对坝肩稳定不利。
温降时：
拱坝的轴线缩短，向下游变位，由此产生的剪力、弯矩的方向与水压力产生的剪力、弯矩的方向相同；轴力的方向与水压力产生的方向相反，对坝体应力不利。
温升时：
拱坝的轴线伸长，向上游变位，由此产生的剪力、弯矩的方向与水压力产生的剪力、弯矩的方向相反，轴力的方向与水压力产生的方向相同，对坝肩稳定不利。

试题解析

标签：水工建筑物水利工程大学试题工学

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