挡土墙稳定性安全系数与可靠度指标的关系
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摘要
寻找重力式挡土墙抗倾覆稳定性安全系数和抗滑移稳定性安全系数与对应可靠度指标的关系.针对甘肃某粘土边坡设计36种不同截面尺寸的挡土墙,利用MATLAB程序分别计算每种挡土墙的安全系数和可靠度指标,可靠度指标的计算方法为一次二阶矩法中的验算点法.分别绘制抗倾覆稳定性安全系数和抗滑移稳定性安全系数与可靠度指标的关系曲线图,可以看出可靠度指标随着对应安全系数的增大而增大.
The relationship between the safety factor of anti-toppling and anti-sliding stability and its corresponding reliability index of the gravity retaining wall was determined.36 types of retaining walls with different section dimensions were designed for a cohesive soil slope in Gansu province.The safety factor and reliability index of these retaining walls were computed with MATLAB software.The design point method in the linear second-order-moment theory for structural reliability analysis was taken as the computative method for reliability index.The curves representing the relationship between safety factor for anti-overturn and anti-slide and the reliability index was plotted.It was shown by the figures that the reliability index increased with its corresponding safety factor.
The relationship between the safety factor of anti-toppling and anti-sliding stability and its corresponding reliability index of the gravity retaining wall was determined.36 types of retaining walls with different section dimensions were designed for a cohesive soil slope in Gansu province.The safety factor and reliability index of these retaining walls were computed with MATLAB software.The design point method in the linear second-order-moment theory for structural reliability analysis was taken as the computative method for reliability index.The curves representing the relationship between safety factor for anti-overturn and anti-slide and the reliability index was plotted.It was shown by the figures that the reliability index increased with its corresponding safety factor.
引文
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[2]张建仁.挡土墙结构稳定性的可靠度分析[J].中国公路学报,1997,10(3):53-58.
[3]王广月.挡土墙稳定性的模糊可靠度分析[J].山东大学学报:工学版,2003,33(3):346-348.
[4]杜永峰,赵广强,李慧,等.防滑凸榫挡土墙的防滑探讨[J].兰州理工大学学报,2007,33(2):112-115.
[5]杜永峰,余钰,李慧.重力式挡土墙千钧一发生的结构体系可靠度分析[J].岩土工程学报,2008,30(3):349-353.
[6]杜永峰,李慧,金德保,等.大震下被动与智能隔震结构动力可靠度对比[J].地震工程与工程振动,2006,26(4):212-219.
[7]赵国藩,金伟良,贡金鑫.结构可靠度理论[M].北京:中国建筑工业出版社,2000.
[8]黄广军,刘昌清,彭胤宗.土压力计算中综合内摩擦角取值探讨[J].西南交通大学学报,1992,31(1):86-92.
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