正在加载图片...
D0:10.19721.cnki.1001-7372.2015.06.009 第28卷第6期 中国公路学报 Vol.28 No.6 2015年6月 China Journal of Highway and Transport June 2015 文章编号:100-7372(2015) 不同跨径桥梁车辆荷载分项系数及可靠度 杨晓艳,贡金盒1,冯云芬2 1.大连理工大学士木工程学院,辽宁大连116024:2.聊城大学建筑工程学院,山东聊城252059) 摘要:以可靠度理论和实测车辆荷载数据为基础,报学了考虑桥梁跨径对车辆荷载分项系数的影 响。根据近年中国车柄荷载实期数据,对不同跨径简支和连续桥梁的车辆荷载效应进行计算,建立 车柄益露被应的授率模型:控服相同超越概率的质则,得到不同路经桥粱车炳荷露放应玩准值的路 径影响系数,在此基础上确定了不同跨径桥梁结构的车辆荷载分项系数与跨径的关系,并采用一次 二阶矩可靠度方法计算了其可靠指标。结果表明:按相同超越概率原则确定的车辆荷载效应标准 值的跨径影响系数和车荷载分项系数随桥梁跨径的减小而增大:给出的考虑跨径影响的车柄荷 载分项系数计算公式更合理。 关键词:桥梁工程:荷我效应:概率模型:分项系数:可靠度 中图分类号:U441.2 文献标志码:A Partial Factors of Vehicle Loads and Reliability Analysis of Bridges with Different Spans YANG Xiao-yan',GONG Jin-xin',FENG Yumfen? Civil Engineering.Liaocheng University Liaocheng 52059. handong.China) Abstract:Based on reliability theory and recently measured vehicle load data.the influence of bridge span on partial factors of vehicle load was derived.According to recently vehicle load data measured in China,the vehicle load effects of multi-span simply supported and continuous two equ span bridges were as well as the probability models were founded.In acordance to the principle of the same exceeding probability,influence factors of span for characteristic values of vehicle load effects with various spans were obtained,based on which,the relationship between the partial factors of vehicle load effeets and the span of bridge was determined Reliability analysis for bridge design as per the determined vehicle load partial factor-span relationship was made with First-order Second-moment method (FOSM).The results show that the span influence factor and vehicle load partial factor for characteristic value of vehicle load effect,which were determined based on the equal exceeding probability,increase with the decrease of the span of bridge.The proposed span dependent partial factor calculation formula for vehicle load for bridge design is more reasonable. 日期.21402-12 21994-2019Ch al Electronic Publishing House.All rights reservec htp: www.cnki.ne 第28卷 第6期 2015年6月 中 国 公 路 学 报 ChinaJournalofHighwayandTransport Vol.28 No.6 June2015 文章编号:1001-7372(2015)06-0059-08 收稿日期:2014-07-17 基金项目:国家重点基础研究发展计划(“九七三”计划)项目(2015CB057703) 作者简介:杨晓艳(1985-),女,辽宁沈阳人,工学博士,E-mail:yangxiaoyan0024@126.com。 不同跨径桥梁车辆荷载分项系数及可靠度 杨晓艳1,贡金鑫1,冯云芬2 (1.大连理工大学 土木工程学院,辽宁 大连 116024;2.聊城大学 建筑工程学院,山东 聊城 252059) 摘要:以可靠度理论和实测车辆荷载数据为基础,推导了考虑桥梁跨径对车辆荷载分项系数的影 响。根据近年中国车辆荷载实测数据,对不同跨径简支和连续桥梁的车辆荷载效应进行计算,建立 车辆荷载效应的概率模型;按照相同超越概率的原则,得到不同跨径桥梁车辆荷载效应标准值的跨 径影响系数,在此基础上确定了不同跨径桥梁结构的车辆荷载分项系数与跨径的关系,并采用一次 二阶矩可靠度方法计算了其可靠指标。结果表明:按相同超越概率原则确定的车辆荷载效应标准 值的跨径影响系数和车辆荷载分项系数随桥梁跨径的减小而增大;给出的考虑跨径影响的车辆荷 载分项系数计算公式更合理。 关键词:桥梁工程;荷载效应;概率模型;分项系数;可靠度 中图分类号:U441.2 文献标志码:A PartialFactorsofVehicleLoadsandReliabilityAnalysisof BridgeswithDifferentSpans YANGXiao-yan1,GONGJin-xin1,FENGYun-fen2 (1.SchoolofCivilEngineering,DalianUniversityofTechnology,Dalian116024,Liaoning,China; 2.SchoolofArchitecture& CivilEngineering,LiaochengUniversity,Liaocheng252059,Shandong,China) Abstract:Basedonreliabilitytheoryandrecently measuredvehicleloaddata,theinfluenceof bridgespanonpartialfactorsofvehicleloadwasderived.Accordingtorecentlyvehicleloaddata measuredinChina,thevehicleloadeffectsofmulti-spansimplysupportedandcontinuoustwo- equalspanbridgeswerecalculated,aswellastheprobabilitymodelswerefounded.Inaccordance totheprincipleofthesameexceedingprobability,influencefactorsofspanforcharacteristic valuesofvehicleloadeffectswithvariousspanswereobtained,basedonwhich,therelationship betweenthepartialfactorsofvehicleloadeffectsandthespan ofbridge wasdetermined. Reliabilityanalysisforbridgedesign asperthedetermined vehicleload partialfactor-span relationshipwasmadewithFirst-orderSecond-momentmethod(FOSM).Theresultsshowthat thespaninfluencefactorandvehicleloadpartialfactorforcharacteristicvalueofvehicleload effect,which weredetermined based ontheequalexceeding probability,increase withthe decreaseofthespanofbridge.Theproposedspandependentpartialfactorcalculationformulafor vehicleloadforbridgedesignismorereasonable. DOI:10.19721/j.cnki.1001-7372.2015.06.009
向下翻页>>
©2008-现在 cucdc.com 高等教育资讯网 版权所有