【摘要】 自5.12汶川地震至2009年5月一年的时间内,作者通过对汶川地震灾区的16次调查,获得了桥梁震害的第一手资料。该文首先对汶川地震、九江-瑞昌地震以及唐山大地震暴露出的关于地震区划图的问题进行探讨,结果表明在我国地震区划图标示为低震区内多次发生强烈地震,建议工程师与科研人员正确认识和使用区划图;并通过对比美国、日本以及我国地震区划图,提出我国地震动区划图的发展趋势及编制多水准地震动区划图的必要性;然后,结合汶川地震后对公路交通系统的调查,研究了地震灾区不同场地条件下桥型的抗震性能,讨论了概念设计与抗震构造措施对桥梁抗震的重要性,同时探讨了桥梁结构的抗震设防标准问题;最后总结汶川地震给我国公路桥梁抗震带来的经验与教训,针对地震动区划图、桥梁抗震性能的评价、设计与研究提出意见。更多还原

【Abstract】 This paper is based on 16 surveys since the occurrence of Wenchuan earthquake.Taking Wenchuan Earhquake,Jiujiang-Ruichang Earthquake and Tangshan Earthquake as examples,some problems in seismic zonation of China were discussed.It was pointed out that strong earthquakes have taken place in the above regions much more frequently than indicated by the zonation map.By reviewing the state-of-the-art of the seismic zonation of China,USA and Japan,the developing trend was studied and the multi-level seismic zonation map of China was put forward.Then the aseismic performance of various bridge types was analyzed and the importance of the concept design was stated.Finally,some suggestions on seismic zonation,aseismic performance evaluation,and seismic design were proposed.更多还原