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抗力分项系数双重迭代求解算法(英文)

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Keywords: 桥梁工程,抗力分项系数,双重迭代算法,修正抗力,可靠度

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Abstract:

分析了映射变换法与插值法的嵌套循环特性,提出了抗力分项系数的双重迭代求解算法,应用VB编制了计算程序,计算了活恒载效应比为0.10、0.25、0.50、1.00、1.50、2.50六种工况下的构件抗力分项系数,将分项系数乘以荷载效应组合值后得到修正抗力值,针对修正抗力与荷载效应进行了可靠指标校核验算。计算结果表明应用双重迭代算法求得构件的可靠指标均大于目标可靠指标,汽车一般运营状态下构件的可靠指标计算值与目标值的相对误差在0.62%~0.92%之间,汽车密集运行状态下两者相对误差在0.62%~0.74%之间,说明双重迭代算法计算结果可靠,且偏于安全。

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