双索面斜拉桥主梁抗震强度的模糊可靠性分析
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摘要
利用ANSYS有限元软件建立1座双索面斜拉桥的有限元模型,分析了其模态振型的特征和地震时程响应,找出了该桥主梁弯矩响应最大的截面;同时分析了影响地震弯矩响应与主梁抗弯承载力的模糊因素;然后分别利用常规可靠性分析的验算点法与模糊可靠性分析的区间数转化法对该桥主梁的抗弯强度进行了分析,结果指出该桥主梁在地震中有较好的安全性.
Using ANSYS finite element software this paper establishes one pairs of cable-plane cable-stayed bridge of finite element model,analyses the characteristics of the vibration mode and the seismic time-history of the bridge and then finds out the max section of the moment of the bridge's main beam.At the same time,it analyses the fuzzy factors of the seismic moment reaction and the main beam bending capacity.In conclusion,it analyses the bending strength of the cross-section by using the analysis of fuzzy reliability and the analysis of conventional reliability respectively.The results show that the main beam of the bridge has good security in the earthquake.
Using ANSYS finite element software this paper establishes one pairs of cable-plane cable-stayed bridge of finite element model,analyses the characteristics of the vibration mode and the seismic time-history of the bridge and then finds out the max section of the moment of the bridge's main beam.At the same time,it analyses the fuzzy factors of the seismic moment reaction and the main beam bending capacity.In conclusion,it analyses the bending strength of the cross-section by using the analysis of fuzzy reliability and the analysis of conventional reliability respectively.The results show that the main beam of the bridge has good security in the earthquake.
引文
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[9]中交公路规划设计院.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.China Communications Construction Highway Planning Design Institute.JTG D62—2004,Code for Design of Highway ReinforcedConcrete and Prestressed Concrete Bridges and Culverts[S].Beijing:China Communications Press,2004.
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[11]董玉革,赵征权.模糊可靠性一次二阶矩法[J].合肥工业大学学报,2005,28(9):980-984.DONG Yu-ge,ZHAO Zheng-quan.Fuzzy Reliability Analysis Based onthe FOSM Method[J].Journal of Hefei University of Indus-trial,2005,28(9):980-984.
[12]马宏旺.钢筋混凝土框架结构抗震可靠度分析与设计研究[D].大连:大连理工大学,2001.MA Hong-wang.Seismic Reliability Analysis and Design of Reinforced Concrete Frames[D].Dalian:Dalian University of Technolo-gy,2001.
[13]卢晓晖.具有应力-强度为随机-模糊干涉模型的可靠性分析[D].兰州:兰州理工大学,2007.LU Xiao-hui.The Fuzzy Reliability Analysis of the Stress-Intensity Model with Fuzzy-Random Variables[D].Lanzhou:Lanzhou U-niversity of Technology,2007.
[14]任晓崧,许奇.已有钢筋混凝土框架结构的抗震可靠度分析[J].工业建筑,2007,37(5):30-33.REN Xiao-song,XU Qi.Aseismic Reliability Aanlysis of Existing Reinforced Concrete Frame Structures[J].Industrial Architec-ture,2007,37(5):30-33.
[2]李桂青,曹宏,李秋胜,等.结构动力可靠性理论及其应用[M].北京:地震出版社,1993.LI Gui-qing,CAO Hong,LI Qiu-sheng,et al.The Theory and Application of Dynamic Reliability of Structures[M].Beijing:Earth-quake Publishing House,1993.
[3]董玉革.机械模糊可靠性设计[M].北京:机械工业出版社,2000.DONG Yu-ge.Fuzzy Reliability Design of Mechanical[M].Beijing:Machinery Industry Press,2000.
[4]程海根,董明.桥梁震害的模糊综合评估[J].云南交通科技,1999,15(4):33-35.CHENG Hai-gen,DONG Ming.Fuzzy Comprehensive Evaluation of Seismic Damage to Bridges[J].Yunnan Communication Scienceand Technology,1999,15(4):33-35.
[5]郭炽斌,尹益辉,朱宝龙.车桥耦合作用下斜拉桥的动力分析[C]//崔京浩.第17届全国结构工程学术会议论文集.北京:工程力学杂志社,2008:425-429.GUO Chi-bin,YI N Yi-hui,ZHU Bao-long.A Dynamic Analysis of a Cable-Stayed Bbridge Subjected to Coupling Act of Vehicle-Bridge[C]//CUI Jing-hao.17th National Symposium on Structural Engineering Papers.Beijing:Engineering Mechanics JournalPress,2008:425-429.
[6]钟善桐.钢管混凝土统一理论-研究与应用[M].北京:清华大学出版社,2006.ZHONG Shan-tong.Research and Application of Unified Theory of Concrete Filled Steel Tube[M].Beijing:Tsinghua UniversityPress,2006.
[7]范立础.桥梁抗震[M].上海:同济大学出版社,1997.FAN Li-chu.Bridge Seismic[M].Shanghai:Tongji University Press,1997.
[8]孟宪建.结构抗震计算时程分析法的计算要点[J].山西建筑,2007,33(16):65-66.MENG Xian-jian.Key Points for Ti me-History Analysis Calculationin Structural Seismic Calculation[J].Shanxi Architecture,2007,33(16):65-66.
[9]中交公路规划设计院.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.China Communications Construction Highway Planning Design Institute.JTG D62—2004,Code for Design of Highway ReinforcedConcrete and Prestressed Concrete Bridges and Culverts[S].Beijing:China Communications Press,2004.
[10]张建仁.结构可靠度理论及其在桥梁工程中的应用[M].北京:人民交通出版社,2003.ZHANGJan-ren.Structural Reliability Theory andIts Applicationin Bridge Engineering[M].Beijing:China Communications Press,2003.
[11]董玉革,赵征权.模糊可靠性一次二阶矩法[J].合肥工业大学学报,2005,28(9):980-984.DONG Yu-ge,ZHAO Zheng-quan.Fuzzy Reliability Analysis Based onthe FOSM Method[J].Journal of Hefei University of Indus-trial,2005,28(9):980-984.
[12]马宏旺.钢筋混凝土框架结构抗震可靠度分析与设计研究[D].大连:大连理工大学,2001.MA Hong-wang.Seismic Reliability Analysis and Design of Reinforced Concrete Frames[D].Dalian:Dalian University of Technolo-gy,2001.
[13]卢晓晖.具有应力-强度为随机-模糊干涉模型的可靠性分析[D].兰州:兰州理工大学,2007.LU Xiao-hui.The Fuzzy Reliability Analysis of the Stress-Intensity Model with Fuzzy-Random Variables[D].Lanzhou:Lanzhou U-niversity of Technology,2007.
[14]任晓崧,许奇.已有钢筋混凝土框架结构的抗震可靠度分析[J].工业建筑,2007,37(5):30-33.REN Xiao-song,XU Qi.Aseismic Reliability Aanlysis of Existing Reinforced Concrete Frame Structures[J].Industrial Architec-ture,2007,37(5):30-33.
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