长大公路混凝土连续梁桥抗震方案比选
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摘要
长大公路混凝土连续梁桥通常具有全桥连续长度大、联长较长、上部混凝土主梁自重较大、结构较刚等特点,当建于强震区时,其抗震设计是个技术难点。本文介绍了长大公路混凝土连续梁桥的抗震结构、隔震结构和振动控制结构的设计概念,并对3种基本抗震设计概念的适用性进行了评述。基于实桥案例,对当前实际工程中应用最多的抗震结构方案与隔震结构方案进行了技术比选。结构地震反应分析结果表明,与常规的抗震结构方案相比,隔震结构方案可使全桥各联下部结构的纵桥向和横桥向的总地震内力平均降低56%和65%以上。本文还侧重介绍了方案比选中隔震支座的选型问题及初拟铅芯橡胶隔震支座设计参数的简化方法,供同类工程参考借鉴。
A long-span concrete continuous highway girder bridge usually has a large contin uous length and a heavy concrete girder with several bridge units.If it is buil t in a strong seismic zone,its seismic design is difficult.This paper introduc es the design concepts of earthquake-resistant-structure(ERS),isolation-str ucture(IS),and vibration-control-structure(VCS) for long-span concrete conti nuous highway girder bridges.The applicability of the three basic design concep ts is reviewed.Both the ERS and the IS design schemes were compared based on a case study.The results show that: comparing with the ERS design scheme,the IS design scheme can in average lower 56% longitudinal and 65% transverse horizonta l seismic force of the bridge substructure.The paper also discusses on the sele ction of seismic isolators,especially on the simplified method for calculating the initial design parameters of lead rubber bearing(LRB) during the concept de sign and preliminary design phases,which provide certain reference significance for similar projects.
A long-span concrete continuous highway girder bridge usually has a large contin uous length and a heavy concrete girder with several bridge units.If it is buil t in a strong seismic zone,its seismic design is difficult.This paper introduc es the design concepts of earthquake-resistant-structure(ERS),isolation-str ucture(IS),and vibration-control-structure(VCS) for long-span concrete conti nuous highway girder bridges.The applicability of the three basic design concep ts is reviewed.Both the ERS and the IS design schemes were compared based on a case study.The results show that: comparing with the ERS design scheme,the IS design scheme can in average lower 56% longitudinal and 65% transverse horizonta l seismic force of the bridge substructure.The paper also discusses on the sele ction of seismic isolators,especially on the simplified method for calculating the initial design parameters of lead rubber bearing(LRB) during the concept de sign and preliminary design phases,which provide certain reference significance for similar projects.
引文
[1]范立础,卓卫东.桥梁延性抗震设计[M].北京:人民交通出版社,2001.
[2]郭磊,李建中,范立础.大跨度连续梁桥减隔震设计研究[J].土木工程学报,2006,39(3):81-85.
[3]王常峰,陈兴冲,朱东生.活动支座摩擦力对桥梁抗震性能的影响参数分析[J].世界地震工程,2005,21(4):82-87.
[4]陈永祁,耿瑞琦,马良喆.桥梁用液体黏滞阻尼器的减振设计和类型选择[J].土木工程学报,2007,40(7):55-61.
[5]王磊,刘寒冰,吴斌暄,等.新型地震结构保护系统的大跨径桥梁抗震分析[J].哈尔滨工业大学学报,2004,36(12):1665-1667.
[6]王志强,葛继平.粘滞阻尼器和Lock-up装置在连续梁桥抗震中应用[J].石家庄铁道学院学报,2006,19(1):5-9.
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[8]范立础,王志强.桥梁减隔震设计[M].北京:人民交通出版社,2001.
[9]焦驰宇,李建中.桥梁新型减隔震支座的研究进展[J].结构工程师,2007,23(3):83-88.
[10]Zayas V,Low S,Mahin S.The FPS Earthquake Re-sisting System[R].California:Technical ReportUCB/EERC-87/01,University of California at Berke-ley,1987.
[11]龚健,周云.摩擦摆隔震技术研究和应用的回顾与前瞻(I)[J].工程抗震与加固改造,2010,32(3):1-10.
[12]周云,龚健.摩擦摆隔震技术研究和应用的回顾与前瞻(II)[J].工程抗震与加固改造,2010,32(4):1-19.
[13]吴陶晶,李建中,管仲国.减隔震装置作用机理及其在大跨度连续梁桥中的应用[J].结构工程师,2009,25(4):102-107.
[14]徐秀丽,段好安,郎冬梅,等.预应力混凝土大跨度连续梁桥隔震设计[J].公路交通科技,2009,26(8):46-50.
[15]Chen Y H,Liao W H,Lee C L,et al.Seismic isola-tion of viaduct piers by means of a rocking mechanism[J].Earthquake Engineering and Structural Dynam-ics,2006,35(6):713-736.
[16]Pecker A.Design and construction of the Rion Antiri-on bridge[C]//Yegian M K,Kavazanjian E.Proc.ofGeoTrans 2004.Los Angeles,CA,USA:ASCE Conf.Proc.,154,7:216-240.
[17]张国镇.公路桥梁考虑支承耐震性能之研讨[C]//房贞政.第四届全国防震减灾工程学术研讨会会议论文集.北京:中国建筑工业出版社,2009:686-692.
[18]周福霖.工程结构减震控制[M].北京:地震出版社,1997.
[19]欧进萍.结构振动控制[M].北京:科学出版社,2003.
[20]CECS126:2001,叠层橡胶支座隔震技术规程[S].
[2]郭磊,李建中,范立础.大跨度连续梁桥减隔震设计研究[J].土木工程学报,2006,39(3):81-85.
[3]王常峰,陈兴冲,朱东生.活动支座摩擦力对桥梁抗震性能的影响参数分析[J].世界地震工程,2005,21(4):82-87.
[4]陈永祁,耿瑞琦,马良喆.桥梁用液体黏滞阻尼器的减振设计和类型选择[J].土木工程学报,2007,40(7):55-61.
[5]王磊,刘寒冰,吴斌暄,等.新型地震结构保护系统的大跨径桥梁抗震分析[J].哈尔滨工业大学学报,2004,36(12):1665-1667.
[6]王志强,葛继平.粘滞阻尼器和Lock-up装置在连续梁桥抗震中应用[J].石家庄铁道学院学报,2006,19(1):5-9.
[7]孙海朋.既有大跨度连续梁桥抗震加固技术研究[D].福州:福州大学,2008.
[8]范立础,王志强.桥梁减隔震设计[M].北京:人民交通出版社,2001.
[9]焦驰宇,李建中.桥梁新型减隔震支座的研究进展[J].结构工程师,2007,23(3):83-88.
[10]Zayas V,Low S,Mahin S.The FPS Earthquake Re-sisting System[R].California:Technical ReportUCB/EERC-87/01,University of California at Berke-ley,1987.
[11]龚健,周云.摩擦摆隔震技术研究和应用的回顾与前瞻(I)[J].工程抗震与加固改造,2010,32(3):1-10.
[12]周云,龚健.摩擦摆隔震技术研究和应用的回顾与前瞻(II)[J].工程抗震与加固改造,2010,32(4):1-19.
[13]吴陶晶,李建中,管仲国.减隔震装置作用机理及其在大跨度连续梁桥中的应用[J].结构工程师,2009,25(4):102-107.
[14]徐秀丽,段好安,郎冬梅,等.预应力混凝土大跨度连续梁桥隔震设计[J].公路交通科技,2009,26(8):46-50.
[15]Chen Y H,Liao W H,Lee C L,et al.Seismic isola-tion of viaduct piers by means of a rocking mechanism[J].Earthquake Engineering and Structural Dynam-ics,2006,35(6):713-736.
[16]Pecker A.Design and construction of the Rion Antiri-on bridge[C]//Yegian M K,Kavazanjian E.Proc.ofGeoTrans 2004.Los Angeles,CA,USA:ASCE Conf.Proc.,154,7:216-240.
[17]张国镇.公路桥梁考虑支承耐震性能之研讨[C]//房贞政.第四届全国防震减灾工程学术研讨会会议论文集.北京:中国建筑工业出版社,2009:686-692.
[18]周福霖.工程结构减震控制[M].北京:地震出版社,1997.
[19]欧进萍.结构振动控制[M].北京:科学出版社,2003.
[20]CECS126:2001,叠层橡胶支座隔震技术规程[S].
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