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大吨位T形刚构桥转体过程抗倾覆性能

, PP. 66-72

Keywords: 桥梁工程,转体,理论推导,抗倾覆,竖向应力,球铰

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Abstract:

?为了保证大吨位T形刚构桥转体过程中不发生倾覆,针对转动体系的构造,分析了转体过程中可能发生的失稳形式特征,对球铰接触面上的压应力分布形态进行了估计,利用半空间体边界作用集中力理论,推导出球铰接触面上竖向压应力公式,继而求出失稳的临界力矩求解公式,并最终确定临界力矩的近似公式。研究结果表明:运用基于接触面竖向压力的失稳临界力矩公式对稳定性验算更为合理、准确,且所提出的近似公式具有足够的工程精度。

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