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基于微分方程组法的柔性墩台内力计算分析

, PP. 121-126

Keywords: 道路工程,微分方程组,柔性墩台,内力计算

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Abstract:

以Maple软件为平台,提出了利用求解微分方程组对柔性墩台进行内力计算的方法。此方法先将桥梁各墩台分别视为一整体考虑,根据各节点处的协调变形关系和力的平衡条件建立墩台各计算单元的微分关系。再通过将整联墩台视为一整体考虑,根据混凝土的收缩、徐变以及温度影响力在各节点处产生的横向位移确定各墩台之间的微分关系。最后通过联立微分方程组并求解,得到各墩台内力变化的函数解析式。与目前广泛使用的“集成刚度法”相比,本文方法计算步骤简捷方便,计算结果精确可靠。

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