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2008年5月12日我国四川省汶川县发生8.0级大地震,造成大量公路桥梁破坏,并为桥梁抗震研究留下了众多资料。总结了汶川地震桥梁震害经验,认为宜重视桥梁近断层地震动响应及防落梁措施、小半径曲线梁桥地震防倒塌设计、桥梁延性抗震设计及细部配筋和深水高桥墩地震损伤及控制等抗震问题。综述了课题组近些年对桥梁抗震研究的若干新进展,包括梁式桥防落梁抗震设计理念及方法、钢筋混凝土桥墩地震抗剪强度及变形能力研究、曲线梁桥地震破坏机理数值分析与小半径曲线梁桥地震防倒塌设计对策等。
May 12, 2008 An earthquake measuring 8.0 on the Richter scale in Wenchuan County, Sichuan Province, caused a great deal of damage to the bridges and bridges and left a great deal of information for the seismic study of bridges. Summarized the earthquake damage experience of the bridge in Wenchuan earthquake, it is suggested that the response of the near-fault ground motion to the bridge and the measures of preventing the falling off of the bridge should be paid attention to, the seismic collapse design of the small radius curve bridge, the seismic design of the bridge ductility, Other seismic issues. In this paper, some new progresses on seismic research of bridges are reviewed, including the seismic design concept and method of anti-piercing beams for girder bridges, seismic shear strength and deformation capacity of reinforced concrete piers, numerical analysis of earthquake damage mechanism of curved girder bridges and small radius Curved beam bridge seismic collapse design and so on.