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自锚式悬索桥合理成桥状态的实用计算方法

, PP. 82-87

Keywords: 桥梁工程,自锚式悬索桥,刚性支承连续梁法,梁比拟法,合理成桥状态,吊索张力,主缆线形

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Abstract:

合理确定吊索张力及主缆线形是自锚式悬索桥设计中的关键问题。基于加劲梁的受力特性,推导了用于吊索张力优化的刚性支承连续梁法;从悬索的基本平衡微分方程出发,提出了主缆线形计算的梁比拟法;两者结合使用,通过常用的杆系结构线性分析程序即可进行吊索力优化及主缆线形计算,从而确定自锚式悬索桥的合理成桥状态。算例分析表明,实用方法的力学意义明确、操作简单且计算精度高,可在设计实践中推广。

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