【摘要】 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。更多还原

【Abstract】 The great Wenchuan earthquake,which measured as 8.0 Ms and occurred on May 12,2008 in Sichuan province of China,has caused severe damage to many highway bridges and also left us with valuable information that can be analyzed to reduce potential losses associated with future earthquakes.The Lessons learned from Wenchuan seismic damages of highway bridges were summarized.It is believed that special attention should be paid to(1) bridge seismic response and unseating damages subjected to near-fault ground motions;(2) preventive design of collapse damage of curved girder bridges with small radius;(3) ductility and seismic design,detailed reinforcement of bridges and seismic damage control of high-rise piers under deep water.The recent research progress of our research team on seismic performance of highway bridges was summarized.It includes design idea and method of unseating protection of highway bridges,deformation capacity and shear strength of PC bridge piers,numerical simulation of seismic damage mechanism of curved girder bridges,and countermeasures to prevent collapse of curved girder bridges with small radius.更多还原