|
|
|
Abstract The load bearing capacity of existing bridges can be more realistically assessed using a method that assesses the capacity based on load history information using structural time-dependent reliability theory. The capacity degradation is described by a fully-correlated stochastic process and the loading history is described by a statistically independent stochastic process. An explicit formula is presented that takes into account the capacity deterioration and the uncertainties associated with the load history. Illustrative examples demonstrate the accuracy of this method. The method is then used to analyze the effects of loading history, with and without consideration of the resistance degradation, on the capacity assessment of existing bridges. Larger loading histories give a larger updated bridge bearing capacity. However, if the resistance degradation is ignored, the bearing capacity will be greatly overestimated, resulting in unsafe evaluation results.
|
| Keywords
existing bridges
loading history
structural deterioration
bearing capacity
evaluation
|
|
Issue Date: 20 January 2015
|
|
|
| [1] |
梅刚, 秦权, 林道锦. 公路桥梁车辆荷载的双峰分布概率模型[J]. 清华大学学报: 自然科学版, 2003, 43(10): 1394-1396. MEI Gang, QIN Quan, LIN Daojin. Bi-modal probabilistic model of highway and bridge vehicle loads[J]. Journal of Tsinghua University: Science and Technology, 2003, 43(10): 1394-1396. (in Chinese)
url: http://www.cnki.com.cn/Article/CJFDTotal-QHXB200310026.htm
|
| [2] |
钟曙亮. 公路既有桥梁承载力评定方法研究 [D].成都: 西南交通大学, 2010. ZHONG Shuliang. Rating Method for Resistance of Highway Existing Bridges [D]. Chengdu: Southwest Jiaotong University, 2010. (in Chinese)
|
| [3] |
张宇贻, 秦权. 钢筋混凝土桥梁构件的时变可靠度分析[J]. 清华大学学报: 自然科学版, 2001, 41(12): 65-67. ZHANG Yuyi, QIN Quan. Time dependent reliability analysis of deteriorating RC bridge girders[J]. Journal of Tsinghua University: Science and Technology, 2001, 41(12): 65-67.(in Chinese)
url: http://www.cnki.com.cn/Article/CJFDTotal-QHXB200112020.htm
|
| [4] |
Enright M P, Frangopol D M. Service-life prediction of deteriorating concrete bridges[J]. Journal of Structural Engineering, 1998, 124(3),309-317.
url: http://dx.doi.org/10.1061/(ASCE)0733-9445(1998)124:3(309)
|
| [5] |
JTG H11-2004.公路桥涵养护规范 [S].北京: 人民交通出版社,2004. JTG H11-004, Code for Maintenance of Highway Bridges and Culvers[S]. Beijing: China Communications Press, 2004. (in Chinese)
|
| [6] |
JTG/T J21-2011. 公路桥梁承载能力检测评定规程 [S]. 北京: 人民交通出版社, 2011. JTG/T J21-2011. Specification for Inspection and Evaluation of Load-bearing Capacity of Highway Bridges [S]. Beijing: China Communications Press, 2011. (in Chinese)
|
| [7] |
Ellingwood B R. Reliability-based condition assessment and LRFD for existing structures[J]. Structural Safety, 1996, 18(2): 67-80.
url: http://dx.doi.org/10.1016/0167-4730(96)00006-9
|
| [8] |
Ellingwood B R. Risk-informed condition assessment of civil infrastructure: State of practice and research issues[J]. Structure and Infrastructure Engineering, 2005,1: 7-18.
url: http://dx.doi.org/10.1080/15732470412331289341
|
| [9] |
李全旺,李春前, 孙健康. 基于结构可靠度理论的既有桥梁承载能力评估[J]. 工程力学, 2010, 27(II): 142-151. LI Quanwang, LI Chunqian, SUN Jiankang. Capacity evaluation of existing bridges based on structural reliability theory[J]. Engineering Mechanics, 2010, 27(II): 142-151(in Chinese)
url: http://www.cnki.com.cn/Article/CJFDTotal-GCLX2010S2013.htm
|
| [10] |
Ang A H S, Tang W H. Probability Concepts in Engineering Planning and Design[M]. 1st ed. New York, USA:Wiley, 1975.
|
| [11] |
Stewart M G, Val D V. Role of load history in reliability-based decision analysis of aging bridges[J]. Journal of Structural Engineering, 2004, 125(7): 776-783.
|
| [12] |
Enright M P, Frangopol D M. Condition prediction of deteriorating concrete bridges using Bayesian updating[J]. Journal of Structural Engineering, 1999, 125(10), 1118-1125.
url: http://dx.doi.org/10.1061/(ASCE)0733-9445(1999)125:10(1118)
|
| [13] |
Mori Y, Ellingwood B R. Reliability-based service-life assessment of aging concrete structures[J]. Journal of Structural Engineering, 1993, 119(5): 1600-1621.
url: http://dx.doi.org/10.1061/(ASCE)0733-9445(1993)119:5(1600)
|
| [14] |
LI Quanwang, WANG Cao, Ellingwood B R. Time dependent reliability of aging structures in the presence of non-stationary loads and degradation[J]. Structural Safety, 52(2015): 132-141.
url: http://dx.doi.org/10.1016/j.strusafe.2014.10.003
|
| [15] |
秦权, 杨小刚. 退化结构时变可靠度分析[J]. 清华大学学报: 自然科学版, 2005, 45(6): 733-736. QIN Quan, YANG Xiaogang. Time dependent reliability analysis of deteriorating structures[J]. Journal of Tsinghua University: Science and Technology, 2005, 45(6): 733-736.
url: http://www.cnki.com.cn/Article/CJFDTotal-QHXB200506004.htm
|
| [16] |
Hall W B. Reliability of service-proven structures[J]. Journal of Structural Engineering, 1988, 114(3): 608-624.
url: http://dx.doi.org/10.1061/(ASCE)0733-9445(1988)114:3(608)
|
| [17] |
袁伦一, 鲍卫刚. 《公路钢筋混凝土及预应力混凝土桥涵设计规范》条文应用算例 [M]. 北京: 人民交通出版社. 2005. YUAN Lunyi, BAO Weigang. Explanations for the Code for Design of Highway Reinforced Concrete and Prestressed Concrete Bridges and Culverts [M]. Beijing: China Communications Press, 2005. (in Chinese)
|
| [18] |
JTG D62-2004 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. JTG D62-2004 D62-2004. Code for Design of Highway Reinforced Concrete and Prestressed Concrete Bridges and Culverts [S]. Beijing: China Communications Press, 2004. (in Chinese)
|
| [19] |
Ellingwood B R. Development of a Probability based Load Criterion for American National Standard A58: Building Code Requirements for Minimum Design Loads in Buildings and Other Structures[M]. Washington DC, USA: US Department of Commerce, National Bureau of Standards, 1980.
|
| [20] |
O'Brien E J, Bordallo-Ruiz A, Enright B. Lifetime maximum load effects on short-span bridges subject to growing traffic volumes[J]. Structural Safety, 2014, 50: 113-122.
url: http://dx.doi.org/10.1016/j.strusafe.2014.05.005
|
| [21] |
李植淮, 李春前, 孙健康, 等. 基于 GPD 模型的车辆荷载效应极值估计[J]. 工程力学, 2012, 6(增刊I): 166-171. LI Zhihuai, LI Chunqian, SUN Jiankang, et al.Estimation of extreme vehicle load effect based on GPD model[J]. Engineering Mechanics, 2012,6(suppl I): 166-171.
url: http://www.cnki.com.cn/Article/CJFDTotal-GCLX2012S1035.htm
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
2015,
Vol. 55
),Cao WANG,Long ZHANG
