摘要
用有限元方法对简支梁桥的横向地震反应按全桥模型进行了计算分析，并与我国公路规范方法的结果进行了比较。讨论了桥长、主梁横向刚度、不同计算模型等因素对简支梁桥横向地震反应的影响。研究表明：对于简支梁桥的横向抗震计算，应该采用全桥模型计算；我国现行公路及铁路抗震规范中的简化计算方法误差较大。
The transverse seismic response of simply supported girder bridges is analyzed by the finite element method. The effects of span length, lateral rigidity of girder, and different analysis model are discussed. The results show that the entire bridge model should be used in transverse seismic analysis for the simply supported girder bridge. The transverse rotational stiffness of bear- ing has a significant influence on seismic response of the bridge. In the case of a bridge with transverse fixed bearing on the abutment, abutment, real moments or shear forces in the pier adjacent to the abutment are lower than calculating results obtained by the simplified method . It is used in Chinese code, which based on an individual pier model. But real moments or shear forces in middle piers are more than the calculating results.
出处
《土木工程学报》
EI
CSCD
北大核心
2000年第4期27-31,共5页
China Civil Engineering Journal
基金
铁道部青年科技专项基金
关键词
简支梁桥
横向地震力
规范
地震反应
simply supported girder bridge, transverse seismic response, Chinese code.
