摘要
考虑近场速度脉冲型地震动特征,对型钢-混凝土组合结构桥梁的地震易损性进行分析。以一座工字型钢-混凝土组合梁桥为例,从PEER数据库挑选60条近场地震动记录作为输入,对桥梁结构整体性能和局部性能两个层次的易损性进行分析,给出了桥梁结构的整体和局部地震易损性曲线。通过与远场地震作用下的桥梁结构地震易损性分析结果的对比研究,发现:近场速度脉冲型地震引起的桥梁结构整体和局部地震需求均显著大于远场地震;在近场地震作用下,桥墩是型钢-混凝土组合桥梁的最易损构件,混凝土横梁与栓钉的易损性水平低于桥墩。
The seismic fragility analysis was conducted for a steel-concrete composite bridge( SCCB) including the effects of the near-fault pulse-like ground motions. A total of 60 real ground motions were selected from the PEER strong earthquake database as the inputs. The global fragility curves and local fragility curves of the bridge were obtained through the fragility analysis. Compared to the fragility results of the far-field earthquake records,it is found that the demands due to the near-fault ground motions are significantly larger than that due to the far-field ground motions. Under the near-fault pulse-like ground motions,the pier is the most fragile component,while the concrete crossbeam and the studs are less fragile.
出处
《土木工程学报》
EI
CSCD
北大核心
2016年第S1期56-60,77,共6页
China Civil Engineering Journal
基金
国家自然科学基金(51378162
51178150)
国家科技支撑课题(2013BAJ08B01)
关键词
组合梁桥
近场脉冲型地震动
概率需求模型
地震易损性
基于性能的地震工程
steel-concrete composite bridge
near-fault pulse-like ground motion
probabilistic seismic demand model
seismic fragility
performance-based earthquake engineering
