高烈度软土场地桥梁地震与冲刷联合作用效应研究

摘要
图/表
参考文献(26)
相关文章 (15)

全文: PDF (1939 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要冲刷会导致桥梁基础裸露，土体对桩基的约束作用减弱，使得桥梁基础在地震作用下的危险性增大，因此建立冲刷与地震联合作用下桥梁的失效概率模型，分析震区连续刚构桥冲刷作用组合分项系数具有重要的意义。以地震基本烈度Ⅷ度区某连续刚构桥为依托工程，基于Monte-Carlo法确定冲刷深度的分布函数，并采用CSIBridge有限元软件建立不同冲刷深度下全桥空间有限元动力模型，进行48条地震波下的增量动力分析(IDA)，计算不同冲刷深度的地震作用效应分布函数，并采用直接积分法求得桥梁基础的失效概率及可靠度指标。研究结果表明：通过冲刷与地震的联合作用框架下失效概率分析，可建立冲刷深度与失效概率的非线性关系；该方法可合理确定冲刷与地震作用组合下荷载组合分项系数，可为桥梁在冲刷与地震联合作用下的风险评估和设计提供参考。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	周敉1
	赵威2
	石雄伟3
	朱国强1

关键词 ：地震, 冲刷, 失效概率, 分项系数, 联合作用

Abstract：Scour leads bridge foundation to be exposed, which weakens the constraint function of soil to the pile foundation and increases the damage risk of the foundation under earthquake.Therefore, it is significant to establish the failure probability model of a bridge under the combined effect of scour and earthquake, and to analyze the combined component coefficient of the scour action of the continuous rigid frame bridges in an earthquake zone.In this paper, based on a continuous rigid frame bridge built in the area with seismic basic intensity of VIII degree, the distribution function of the scour depth was determined by the Monte-Carlo method, and the dynamic finite element models of the entire bridge under different scouring depth were established by CSIBridge software.Forty-eight seismic waves were used for incremental dynamic analysis (IDA), and the distribution function of seismic action effects with different scouring depth was calculated.The failure probability and reliability index of bridge foundation at different scouring depths were obtained by the direct integration method.The results show that the nonlinear relationship between the scouring depth and the earthquake failure probability can be established by the failure probability analysis under the framework of combined effect of erosion and earthquake.This method can reasonably determine the partial combination coefficient of loading combination including erosion and seismic action.

Key words： earthquake scour partial coefficient failure probability combined effect

收稿日期: 2019-03-28 出版日期: 2020-04-15

引用本文:

周敉1，赵威2，石雄伟3，朱国强1. 高烈度软土场地桥梁地震与冲刷联合作用效应研究[J]. 振动与冲击, 2020, 39(8): 88-98.
ZHOU Mi1，ZHAO Wei2，SHI Xiongwei3，ZHU Guoqiang1. A study on combined effect of earthquake and scour of bridge in high earthquake-intensity and soft soil site. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(8): 88-98.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2020/V39/I8/88

［1］LAGASSE P F, CLOPPER P E, ZEVENBERGEN L W, et al.National cooperative highway research program(NCHRPReport593): countermeasures to protect b-ridge piers from scour ［R］.Washington D.C.: Transportation Research Board, 2007. ［2］LIANG F Y, BENNETT C R.PARSONS R L, et al.A literature reviewon behavior of scoured piles under bridges ［C］//International Foundation Congress and Equipment Expo.Orlando: ASCE, 2009. ［3］梁发云,刘兵,李静茹.考虑冲刷作用效应桥梁桩基地震易损性分析［J］.地震工程学报,2017,39(1): 13-19. LIANG Fayun, LIU Bing, LI Jingru.Earthquake vulnerability analysis of bridge piles considering erosion effect［J］.China Earthquake Engineering, 2017, 39(1): 13-19. ［4］周敉.高桩承台体系桥梁极端荷载设计方法［M］.长春:吉林大学出版社,2018. ［5］YOU D, DAN M F, DUYGU S.Timevariation sustainability assessment of seismic-ally vulnerable bridges to multiple hazards ［J］.Earthquake Engineering & Structural Dynamics, 2013, 42(10): 1451-1467. ［6］PRASAD G G, BANERJEE S.The impact of floodinduced scour on seismic fragility characteristics of bridges ［J］.Journal of Earthquake Engineering, 2013,17(6): 803-828. ［7］WANG Z H, LEONARDO D O, JAMIE E P.Influence of scour effects on the seismic response of reinforced concrete bridges［J］.Engineering Structures, 2014, 76: 202-214. ［8］杨延凯,马如进,陈艾荣.基于风险的桥梁多灾害下合理冲刷深度研究［J］.华南理工大学学报,2016,44(3): 103-109. YANG Yankai, MA Rujin, CHEN Airong.Risk-based reasonable scouring depth for multi-hazard bridges［J］.Journal of South China University of Technology, 2016, 44(3): 103-109. ［9］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. ［10］王少华,张海啸,周敉.砂土地区桥梁桩-土动力相互作用模型［J］.筑路机械与施工机械化,2018,35(7): 94-101. WANG Shaohua, ZHANG Haixiao, ZHOU Mi.Model of bridge pile-soil dynamic interaction in sandy area［J］.Road Machinery & Construction Mechanization, 2018, 35(7): 94-101. ［11］RNESO L A, ZEVENBE RGEN L W, LAGASSE P F.Evaluating scour at bridges ［R］.Washington, D.C.: Department of Transportation Federal Highway Administration, 2012. ［12］JOHNSON P A, DOCK D A.Probabilistic ridge scour estimates［J］.Journal of Hydraulic Engineering,1998,124(7): 750-754. ［13］刘怀林.任意钢筋混凝土截面弯矩—曲率分析软件研究［J］.公路交通科技,2015,31(2): 69-73. LIU Huailin.Research on software for moment-curvature analysis of sections of arbitrary reinforced concrete［J］.Journal of Highway and Transportation Research and Development, 2015, 31(2): 69-73. ［14］建筑抗震设计规范： GB 50011—2010 ［S］.北京：中国建筑工业出版社，2016. ［15］张明.结构可靠度分析-方法与程序［M］.北京:科学出版社,2009. ［16］陈健,盘钦卿,王卫星.Matlab实现蒙特卡洛法在箱梁施工可靠度中的应用［J］.重庆工商大学学报,2011, 28(1): 90-93. CHEN Jian, PAN Qinqing, WANG Weixing.Application of monte carlo method in the reliability of box girder construction by matlab［J］.Journal of Chongqing Technology and Business University, 2011, 28(1): 90-93. ［17］American Petroleum Institute.API recommended practice for planning, designing, and constructing fixed offshore platforms［M］.［S.l.］: American Petroleum Institute, 1977. ［18］冯清海.特大桥梁地震易损性与风险概率分析［D］.上海:同济大学,2008. ［19］高小旺,鲍霭斌.地震作用的概率模型及其统计参数［J］.地震工程与工程振动,1985(1): 13-22. GAO Xiaowang, BAO Aibin.Probability model of earthquake action and its statistical parameters ［J］.Earthquake Engineering and Engineering Vibration, 1985(1): 13-22. ［20］ELLINGWOOD B, GALAMBOS T V, MACGREGOR J G, et al.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, D.C.: National Bureau of Standards, 1980. ［21］WEN Y K.A clustering model for correlated load processes ［J］.ASCE Journal of Structural Engineering, 1981, 107(5): 965-983. ［22］刘陆东,颜全胜,李金武,等.基于增量动力分析方法的独塔斜拉桥地震易损性分析［J］.铁道建筑,2018,58(5): 17-21. LIU Ludong, YAN Quansheng, LI Jinwu, et al.Analysis of seismic vulnerability of single tower cable-stayed bridge based on incremental dynamic analysis method［J］.Railway Construction, 2018,58(5): 17-21. ［23］杨坤,田石柱,张程.基于IDA方法的RC框架结构倒塌判定准则评估［J］.建筑结构,2018,48(3): 106-109. YANG Kun, TIAN Shizhu, ZHANG Cheng.Evaluation of RC frame structure collapses based on IDA method［J］.Building Structure, 2018, 48(3): 106-109. ［24］赵人达,高能,贾毅,等.基于IDA的大跨连续梁桥地震易损性分析［J］.沈阳建筑大学学报,2017,33(4): 672-679. ZHAO Renda, GAO Neng, JIA Yi, et al.Analysis of seismic vulnerability of long-span continuous beam bridge based on IDA［J］.Journal of Shenyang Jianzhu University, 2017, 33(4): 672-679. ［25］公路工程结构可靠度设计统一标准：GB/T 50283—1999 ［S］.北京：中国计划出版社，1999. ［26］LEEG C, RZHEVSKY V.From the WTC tragedy to the development of disaster engineering for landmark buildings-An extension of the performance-based earthquake engineering approach: MCEER-03-SP04［R］.Buffalo: University at Buffalo, 2003.