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工程力学  2014 

基于车辆荷载效应截尾分布的桥梁限载分析方法

DOI: 10.6052/j.issn.1000-4750.2012.09.0691, PP. 117-124

Keywords: 公路桥梁,桥梁安全,桥梁限载,可靠性分析,截尾分布

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Abstract:

根据车辆荷载效应右截尾分布模型,提出一种基于结构可靠度理论的中、小跨度桥梁限载分析方法。首先以规范规定的车辆荷载效应分布为原始分布,构造右截尾的车辆荷载效应概率密度函数;然后,假定抗力、恒载效应及车辆荷载效应为相互独立的随机变量,建立了考虑车辆荷载效应右截尾分布特征的限载系数反演模型;继而,通过分析车辆荷载效应均值变化对限载系数的影响规律,提出了理想抗力桥梁条件限载系数的确定方法,并讨论了条件限载系数对车辆荷载效应变异系数与分布类型的敏感程度;最后,根据原桥梁规范受弯构件承载能力设计表达式,计算了按原规范设计桥梁的条件限载系数。结果表明,桥梁限载取值仅与设计荷载等级、容许失效概率以及设计采用的活恒载比值有关,而与车辆荷载效应的统计参数关系不大。所提限载分析方法可为中、小跨径桥梁提供具有一致可靠度水平的限载取值。

References

[1]  JTG B01-2003, 公路工程技术标准[S]. 北京: 人民交通出版社, 2003.
[2]  JTG B01-2003 Technical standard of highway engineering [S]. Beijing: China Communications Press, 2003. (in Chinese)
[3]  Honefanger J, Strawhorn J, Athey R, et al. Commercial motor vehicle size and weight enforcement in europe [R]. Washington: U.S. Department of Transportation, 2007.
[4]  Fu G K, Fu C. NCHRP synthesis 359: Bridge rating practices and policies for overweight vehicles [R]. Detroit: Wayne State University, 2006.
[5]  Zhou Xiang. Structural and economical impacts of heavy truck loads on bridges [D]. Louisiana: Louisiana Tech University, 2007.
[6]  Ghosn M. Development of truck weight regulations using bridge reliability method [J]. Journal of Bridge Engineering, 2000, 5(4): 293―303.
[7]  Ghosn M, Moses F. Effect of changing truck weight regulations on U.S. bridge network [J]. Journal of Bridge Engineering, 2000, 5(4): 304―310.
[8]  Zhang Jianren, Peng Hui, Cai C S. Field study of overload behavior of an existing reinforced concrete bridge under simulated vehicle loads [J]. Journal of Bridge Engineering, 2011, 16(2): 226―237.
[9]  Benjamin J R, Cornell C A. Probability, statistic, and decision for civil engineers [M]. New York: McGraw-Hill Inc., 1970.
[10]  GB/T 50283-1999, 公路工程结构可靠度设计统一标准[S]. 北京: 中国计划出版社, 1999.
[11]  GB/T 50283-1999, Unified standard for reliability design of highway engineering structures [S]. Beijing: China Plan Press, 1999. (in Chinese)
[12]  Moses F. NCFRP Report 454: Calibration of load factors for LRFR bridge evaluation [R]. Pittsburgh: University of Pittsburgh, 2001.
[13]  JTG D62-2004, 公路钢筋混凝土及预应力混凝土桥涵设计规范[S]. 北京: 人民交通出版社, 2004.
[14]  JTG D62-2004, Code for design of highway reinforced concrete and prestressed concrete bridges and culverts [S]. Beijing: China Communications Press, 2004. (in Chinese)
[15]  李国强, 黄宏伟, 郑步全. 工程结构荷载与可靠度设计原理[M]. 北京: 中国建筑工业出版社, 2002: 164―165.
[16]  Li Guoqiang, Huang Hongwei, Zheng Buquan. Structural load and reliability-based design philosophy [M]. China Architecture & Building Press, 2002: 164―165. (in Chinese)
[17]  王松根, 李松辉. 公路桥梁限载标准的可靠性分析方法[J]. 工程力学, 2010, 27(10): 162―166.
[18]  Wang Songgen, Li Songhui. Reliability-based vehicular weight limits of highway bridges [J]. Engineering Mechanics, 2010, 27(10): 162―166. (in Chinese)
[19]  JTJ 023-85, 公路钢筋混凝土及预应力混凝土桥涵设计规范[S]. 北京: 人民交通出版社, 1985.
[20]  JTJ 023-85, Code for design of highway reinforced concrete and prestressed concrete bridges and culvers [S]. Beijing: China Communications Press, 1985. (in Chinese)
[21]  LRFR-1, Guide manual for condition evaluation and load and resistance factor rating (LRFR) of highway bridges(1st Edition and 2005 Interim) [S]. Washington DC: American Association of State Highway and Transportation Officials, 2003.
[22]  BR-MCEB-2-I2, Manual for condition evaluation of bridges (2nd Edition with 2001 and 2003 Interim Revisions) [S]. Washington DC: American Association of State Highway and Transportation Officials, 2000.

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