公路桥梁车辆荷载与效应的统计分析
|
摘要
研究公路桥梁汽车荷载与效应的统计性质。应用K-S检验法,拟合车辆荷载的载口分布;根据极值分布理论,计算设计使用寿命期的车辆荷载最大值分布;根据结构力学原理,计算简支梁的跨中弯矩效应分布与等效均布荷载分布;计算这些分布的期望、标准差、变异系数和分位值,它们都是桥梁结构可靠度设计的重要统计参数。
The statistic characteristics of vehicular loads and loading effects on the highway bridge are investigated in the paper. The probability distributions of vehicular loads are fitted by K-S test. The probability distribution of the maximal value of vehicular loads in the useful life period is deduced by the theory of extreme value distributions. The loading effect and equivalent uniform load of mid-span moment in simple beam are calculated in the light of the principle of structural mechanics. The mathematical expectations, standard deviations, coefficients of variation and tantiles of these distributions are calculated and the statistical parameters are significant in the reliability design of bridge construction.
The statistic characteristics of vehicular loads and loading effects on the highway bridge are investigated in the paper. The probability distributions of vehicular loads are fitted by K-S test. The probability distribution of the maximal value of vehicular loads in the useful life period is deduced by the theory of extreme value distributions. The loading effect and equivalent uniform load of mid-span moment in simple beam are calculated in the light of the principle of structural mechanics. The mathematical expectations, standard deviations, coefficients of variation and tantiles of these distributions are calculated and the statistical parameters are significant in the reliability design of bridge construction.
引文
[1]NOWAK A S.Live load model for highway bridges[J].Structural Safety,1993,13(1): 53-66.
[2]NOWAK A S,NASSIF H,DEFRAIN L.Effect of truck loads on bridges[J].Journal of Transportation Engineering,1993,119 (6):853-867.
[3]CROCE P,SALVATORE W.Stochastic model for multilane traffic effects on bridges[J]. Journal of ASCE,2001,6(2):136-143.
[4]CREMONA C.Optimal extrapolation of traffic load effects[J]. Structural Safety,2001,23(1):31-46.
[5]GINDY M.Development of a reliability-based deflection limit state for steel girder bridges[D]. New Jersey: The State University of New Jersey,2004.
[6]YE Huan, CHEN Q H.Stress-strength structural reliability model with a stochastic strength aging deterioration Process[J].Journal of Donghua University,2014,31(6):129-132.
[7]林忠民,工程结构可靠性设计与估计[M].北京:人民交通出版社,1990:244-245.
[8]童乐为,沈祖炎,陈忠延.城市道路桥梁的疲劳荷载谱[J].土木工程学报,1997,30(5):20-27.
[9]李嘉维,夏樟华,宗周红.高速公路桥梁车辆荷载模型分析[J].公路,2010(7):14-17.
[10]周泳涛,鲍卫刚,翟辉,等.我国高速公路交通荷载标准研究[J].公路交通科技,2010,27(2):36-41.
[11]陈名扬,王起才.车辆荷载和车道荷载对桥梁结构可靠度的影响[J].公路交通科技,2012,29(5):67-72.
[12]中华人民共和国国家标准.公路工程结构可靠度设计统一标准:GB/T 50283-99[S].北京:中国计划出版社,1999.
[13]史道济.实用极值统计方法[M].天津:天津科学技术出版社,2006:8,16.
[2]NOWAK A S,NASSIF H,DEFRAIN L.Effect of truck loads on bridges[J].Journal of Transportation Engineering,1993,119 (6):853-867.
[3]CROCE P,SALVATORE W.Stochastic model for multilane traffic effects on bridges[J]. Journal of ASCE,2001,6(2):136-143.
[4]CREMONA C.Optimal extrapolation of traffic load effects[J]. Structural Safety,2001,23(1):31-46.
[5]GINDY M.Development of a reliability-based deflection limit state for steel girder bridges[D]. New Jersey: The State University of New Jersey,2004.
[6]YE Huan, CHEN Q H.Stress-strength structural reliability model with a stochastic strength aging deterioration Process[J].Journal of Donghua University,2014,31(6):129-132.
[7]林忠民,工程结构可靠性设计与估计[M].北京:人民交通出版社,1990:244-245.
[8]童乐为,沈祖炎,陈忠延.城市道路桥梁的疲劳荷载谱[J].土木工程学报,1997,30(5):20-27.
[9]李嘉维,夏樟华,宗周红.高速公路桥梁车辆荷载模型分析[J].公路,2010(7):14-17.
[10]周泳涛,鲍卫刚,翟辉,等.我国高速公路交通荷载标准研究[J].公路交通科技,2010,27(2):36-41.
[11]陈名扬,王起才.车辆荷载和车道荷载对桥梁结构可靠度的影响[J].公路交通科技,2012,29(5):67-72.
[12]中华人民共和国国家标准.公路工程结构可靠度设计统一标准:GB/T 50283-99[S].北京:中国计划出版社,1999.
[13]史道济.实用极值统计方法[M].天津:天津科学技术出版社,2006:8,16.