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公路路线设计可靠性分析

Keywords: 交通工程,路线设计可靠性,可靠度理论,交叉口停车视距

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Abstract:

考虑公路路线设计指标不确定性(随机性),以可靠度理论为基础,建立设计指标极限状态下功能函数,利用一次二阶矩法求解可靠指标。通过可靠指标来分析平面全无控制交叉口停车视距设计,并与目前公路技术标准进行比较。同时对影响停车视距可靠性的各随机变量进行敏感性分析,结果表明车辆运行速度均值和方差及路面摩擦系数均值对停车视距设计指标可靠性影响最大。从而也验证了基于可靠度理论的公路路线设计比传统的定值设计法更为科学合理。

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