汶川地震桥梁震害特征分析及地震易损性研究
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摘要
基于数理统计方法,对汶川地震灾区范围内的铁路和公路系统桥梁震害数据进行了统计分析,得到了2种系统梁式桥梁破坏部位震害分布特征及破坏等级变化特征,结果表明:铁路系统桥梁破坏曲线呈"X"形,公路系统桥梁破坏曲线呈波峰状的"X"形,同等地震作用下,公路系统桥梁震害损失比铁路系统桥梁震害损失大,公路系统桥梁抗震性能比铁路系统桥梁抗震性能差;基于桥梁震害统计得到了不同强度地震作用下2种系统梁式桥梁破坏的易损性矩阵,采用贝塔分布函数拟合得出2种系统梁式桥梁地震易损性曲线及分布函数参数,结果表明:2种系统梁式桥梁在低强度地震作用下均以完好、轻微破坏为主,在高强度地震作用时,铁路桥梁以中等破坏为主,公路桥梁则以严重破坏及毁坏为主。研究成果可为地震灾区震害预测和地震灾害损失评估提供参考依据。
Based on the mathematical statistics method, the seismic damage data of railway and highway system bridges in Wenchuan earthquake area are statistically analyzed, and the characteristics of damage distribution and the change of damage grade of two kinds of system beam bridges are obtained. The results show that the failure curve of the railway system is "X", and the failure curve of the highway system bridge is a "X" shape. Under the same earthquake action, the seismic damage of the highway system bridge is larger than that of the railway system bridge,and the seismic performance of the highway system bridge is worse than that of the railway system bridge. Based on the statistics of bridge seismic damage, the vulnerability matrix of two kinds of system girder bridges under different intensity earthquakes is obtained. Based on the fitting of the beta distribution function, the seismic fragility curves and distribution function fitting parameters of two kinds of system girder bridges are obtained. The results show that the two kinds of beam bridges under the low intensity earthquake are all in good condition. In the high intensity earthquake, the railway bridge is mainly medium damage, and the highway bridge is mainly damaged and destroyed.The research results can provide reference for earthquake disaster prediction and earthquake disaster loss assessment in earthquake stricken areas.
Based on the mathematical statistics method, the seismic damage data of railway and highway system bridges in Wenchuan earthquake area are statistically analyzed, and the characteristics of damage distribution and the change of damage grade of two kinds of system beam bridges are obtained. The results show that the failure curve of the railway system is "X", and the failure curve of the highway system bridge is a "X" shape. Under the same earthquake action, the seismic damage of the highway system bridge is larger than that of the railway system bridge,and the seismic performance of the highway system bridge is worse than that of the railway system bridge. Based on the statistics of bridge seismic damage, the vulnerability matrix of two kinds of system girder bridges under different intensity earthquakes is obtained. Based on the fitting of the beta distribution function, the seismic fragility curves and distribution function fitting parameters of two kinds of system girder bridges are obtained. The results show that the two kinds of beam bridges under the low intensity earthquake are all in good condition. In the high intensity earthquake, the railway bridge is mainly medium damage, and the highway bridge is mainly damaged and destroyed.The research results can provide reference for earthquake disaster prediction and earthquake disaster loss assessment in earthquake stricken areas.
引文
[1]李龙安.地震灾害对铁路桥梁的影响及其抗震设计与减隔震控制研究[J].西南公路, 2010(2):12-22.
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[4]温增平,胡聿贤.基于震害资料的易损性分析方法[C]//第五届全国地震工程会议论文集.北京:中国建筑学会,中国地震学会, 1998:243-248.
[5]庄卫林,刘振宇,蒋劲松.汶川大地震公路桥梁震害分析及对策[J].岩石力学与工程学报, 2009, 28(7):1377-1387.
[6]吉随旺,唐永建,胡德贵,等.四川省汶川地震灾区干线公路典型震害特征分析[J].岩石力学与工程学报, 2009, 28(6):1250-1260.
[7]GB/T 24336—2009,生命线工程地震破坏等级划分[S].北京:中国标准出版社, 2009.
[8]林庆利.铁路系统震害损失评估方法研究[D].哈尔滨:中国地震局工程力学研究所, 2013:92-93.
[9]白倩楠.大震铁路桥涵震损失评估方法研究[D].北京:北京交通大学, 2012:23-27.
[10]吕国军,张合,孙丽娜.张家口地区农村房屋抗震性能调查分析研究[J].地震工程学报, 2016, 38(S2):302-307.
[11]林均岐,陈永盛,王杰.汶川8.0级地震绵竹市桥梁震害分析[J].世界地震工程, 2010, 26(1):80-85.
[12]赵钊,郭恩栋,王再荣,等.基于人工神经网络的城市桥梁震害评估方法[J].世界地震工程, 2011, 27(4):7-12.
[13]王秋萍.汶川地震桥梁震害模糊综合评估方法研究[D].成都:西南交通大学, 2011:20-23.
[14]Yamazaki F, Motomura H, Hamada T. Damage assessment of expressway networks in japan based on seismic monitoring[C]//Proceedings of the 12th World Conference on Earthquake Engineering. Auckland:WCEE, 2000.[14]
[15]Shinozuka M, Feng M Q, Lee J, et al. Statistical analysis of fragility curves[J]. Journal of Engineering Mechanics, 2000, 126(12):1224-1231.
[16]陈力波,郑凯锋,庄卫林,等.汶川地震桥梁易损性分析[J].西南交通大学学报, 2012, 47(4):558-566.
[17]余其鑫.基于历史震害的桥梁地震易损性研究[D].哈尔滨:中国地震局工程力学研究所, 2014:27-33.
[18]吕国军,张合,孙丽娜,等.廊坊市重要建筑物易损性分析[J].地震研究, 2017, 40(4):638-645, 678.
[19]刘如山,胡少卿,邬玉斌,等.基于地震动参数的结构易损性表达方法研究[J].地震工程与工程振动, 2009, 29(6):102-107.
[20]GB/T 18208.4—2005,地震现场工作第4部分:灾害直接损失评估[S].北京:中国标准出版社, 2005.
[2]杨梦蛟.汶川大地震既有铁路桥隧建筑物震害情况与思考[C]//中国铁道学会2008年度优秀学术论文评选一等奖论文.北京:中国铁道学会,2009:118-132.[2]
[3]朱颖,魏永幸.汶川地震铁路工程震害特征及工程抗震设计对策思考[J].岩石力学与工程学报, 2010, 29(S1):3378-3386.
[4]温增平,胡聿贤.基于震害资料的易损性分析方法[C]//第五届全国地震工程会议论文集.北京:中国建筑学会,中国地震学会, 1998:243-248.
[5]庄卫林,刘振宇,蒋劲松.汶川大地震公路桥梁震害分析及对策[J].岩石力学与工程学报, 2009, 28(7):1377-1387.
[6]吉随旺,唐永建,胡德贵,等.四川省汶川地震灾区干线公路典型震害特征分析[J].岩石力学与工程学报, 2009, 28(6):1250-1260.
[7]GB/T 24336—2009,生命线工程地震破坏等级划分[S].北京:中国标准出版社, 2009.
[8]林庆利.铁路系统震害损失评估方法研究[D].哈尔滨:中国地震局工程力学研究所, 2013:92-93.
[9]白倩楠.大震铁路桥涵震损失评估方法研究[D].北京:北京交通大学, 2012:23-27.
[10]吕国军,张合,孙丽娜.张家口地区农村房屋抗震性能调查分析研究[J].地震工程学报, 2016, 38(S2):302-307.
[11]林均岐,陈永盛,王杰.汶川8.0级地震绵竹市桥梁震害分析[J].世界地震工程, 2010, 26(1):80-85.
[12]赵钊,郭恩栋,王再荣,等.基于人工神经网络的城市桥梁震害评估方法[J].世界地震工程, 2011, 27(4):7-12.
[13]王秋萍.汶川地震桥梁震害模糊综合评估方法研究[D].成都:西南交通大学, 2011:20-23.
[14]Yamazaki F, Motomura H, Hamada T. Damage assessment of expressway networks in japan based on seismic monitoring[C]//Proceedings of the 12th World Conference on Earthquake Engineering. Auckland:WCEE, 2000.[14]
[15]Shinozuka M, Feng M Q, Lee J, et al. Statistical analysis of fragility curves[J]. Journal of Engineering Mechanics, 2000, 126(12):1224-1231.
[16]陈力波,郑凯锋,庄卫林,等.汶川地震桥梁易损性分析[J].西南交通大学学报, 2012, 47(4):558-566.
[17]余其鑫.基于历史震害的桥梁地震易损性研究[D].哈尔滨:中国地震局工程力学研究所, 2014:27-33.
[18]吕国军,张合,孙丽娜,等.廊坊市重要建筑物易损性分析[J].地震研究, 2017, 40(4):638-645, 678.
[19]刘如山,胡少卿,邬玉斌,等.基于地震动参数的结构易损性表达方法研究[J].地震工程与工程振动, 2009, 29(6):102-107.
[20]GB/T 18208.4—2005,地震现场工作第4部分:灾害直接损失评估[S].北京:中国标准出版社, 2005.