既有混凝土梁桥抗震性能评价
|
摘要
针对既有混凝土梁桥抗震性能评价尚无规范可循的现状,结合正在实行的《公路桥梁抗震设计细则》(JTG/T B02-01-2008)以及《公路桥梁抗震性能评价细则》(征求意见稿),对相关规定对比分析,明确既有混凝土梁桥抗震性能评价方法。根据桥梁的重要程度、建造年代、设计标准等确定抗震性能目标;对桥梁进行调研,针对构造措施、构造细节等进行一级评价;对关键构件进行详细的抗震能力评价,依据结构形式、材料实际强度等,对其整体抗震性能进行二级评价;综合评价结果,针对存在的问题提出解决建议。将该方法应用于京沪高速公路某混凝土梁桥,得出该桥总体抗震性能不满足要求,建议优化支座布置方式及更改支座型号,或采取减隔震措施。应用实例验证该评价方法思路清晰、步骤明确、便于应用。
At present,there is still a lack of related specifications for seismic performance evaluation of existing concrete bridges,the relevant norms for this issue in the in-service Anti-seismic Design Specification for Highway Bridges(JTG/T B02-01-2008)and Seismic Performance Evaluation Specification(the draft one for comment)were contrastively analyzed to confirm the seismic performance evaluation methods for existing concrete bridges.The seismic performance targets were determined according to the significance of the bridge,construction time and the design standards.A survey of bridges was carried out.The first-level evaluation of the bridge condition was done according to the structural configuration and details.The seismic performance of key components was evaluated in detail.According to the structural form and the actual strength of materials,the second level of global seismic performance evaluation of the bridge was done.All the evaluating results were integrated aiming to make suggestions for the existing problems.This method was applied to a concrete bridge on the Beijing-Shanghai high-speed railway.It was concluded that the global seismic performance of the bridge could not meet the requirements.In order to improve the seismic performance,the measures such as optimizing the arrangement of the bearings,changing the type of bearings or taking vibration mitigation and isolation measures were suggested.The engineering practice proves that this method has the advantages of explicit theoretical supports,clear operation procedure and is convenient for application.
At present,there is still a lack of related specifications for seismic performance evaluation of existing concrete bridges,the relevant norms for this issue in the in-service Anti-seismic Design Specification for Highway Bridges(JTG/T B02-01-2008)and Seismic Performance Evaluation Specification(the draft one for comment)were contrastively analyzed to confirm the seismic performance evaluation methods for existing concrete bridges.The seismic performance targets were determined according to the significance of the bridge,construction time and the design standards.A survey of bridges was carried out.The first-level evaluation of the bridge condition was done according to the structural configuration and details.The seismic performance of key components was evaluated in detail.According to the structural form and the actual strength of materials,the second level of global seismic performance evaluation of the bridge was done.All the evaluating results were integrated aiming to make suggestions for the existing problems.This method was applied to a concrete bridge on the Beijing-Shanghai high-speed railway.It was concluded that the global seismic performance of the bridge could not meet the requirements.In order to improve the seismic performance,the measures such as optimizing the arrangement of the bearings,changing the type of bearings or taking vibration mitigation and isolation measures were suggested.The engineering practice proves that this method has the advantages of explicit theoretical supports,clear operation procedure and is convenient for application.
引文
[1]徐秀丽,马静静,郎冬梅,等.高烈度地震区板式桥抗震性能研究[J].桥梁建设,2009,(1):22-24.
[2]何晗欣,刘健新.能力谱方法在桥梁抗震性能评估中的适用性[J].长安大学学报:自然科学版,2009,29(4):48-52.
[3]管仲国,李建中,范立础.公路桥梁合理抗震设防理念研究[J].土木工程学报,2010,(4):99-104.
[4]庄卫林,余翔,易志宏,等.简支体系桥梁的震害及抗震设计对策[J].桥梁建设,2008,(4):61-64.
[5]蒋劲松,庄卫林,刘振宇.汶川地震百花大桥震害调查分析[J].桥梁建设,2009,(6):41-44.
[6]刘汉歆,周建春.桥梁抗震加固初定评估研究[J].中国水运,2009,9(1):201-202.
[7]周行人,刘海波,胡建华.高烈度区高墩桥梁抗震措施研究[J].桥梁建设,2011,(2):42-45.
[8]王维.推倒分析在桥梁抗震性能评价中的应用(硕士学位论文)[D].成都:西南交通大学,2007.
[9]Ian Buckle,Ian Friedland,John Mander,等.公路结构物抗震加固改造手册(上册)[M].北京:人民交通出版社,2008.
[2]何晗欣,刘健新.能力谱方法在桥梁抗震性能评估中的适用性[J].长安大学学报:自然科学版,2009,29(4):48-52.
[3]管仲国,李建中,范立础.公路桥梁合理抗震设防理念研究[J].土木工程学报,2010,(4):99-104.
[4]庄卫林,余翔,易志宏,等.简支体系桥梁的震害及抗震设计对策[J].桥梁建设,2008,(4):61-64.
[5]蒋劲松,庄卫林,刘振宇.汶川地震百花大桥震害调查分析[J].桥梁建设,2009,(6):41-44.
[6]刘汉歆,周建春.桥梁抗震加固初定评估研究[J].中国水运,2009,9(1):201-202.
[7]周行人,刘海波,胡建华.高烈度区高墩桥梁抗震措施研究[J].桥梁建设,2011,(2):42-45.
[8]王维.推倒分析在桥梁抗震性能评价中的应用(硕士学位论文)[D].成都:西南交通大学,2007.
[9]Ian Buckle,Ian Friedland,John Mander,等.公路结构物抗震加固改造手册(上册)[M].北京:人民交通出版社,2008.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心