【摘要】 根据钢筋混凝土桥墩的破坏特点和桥梁结构基于性能抗震设计的需要,将钢筋混凝土桥墩性能水平划分为正常使用、暂时使用、修复后使用、生命安全和防止倒塌5个性能水平,并结合各国相关研究成果,从社会经济角度,建立了桥梁结构震害定性决策标准;从震后现场震害评估角度,建立了钢筋混凝土桥墩现场震害评估调查性能量化标准。在分析各国127个以发生弯曲破坏为主的钢筋混凝土圆形截面桥墩试验研究的基础上,从工程设计角度,以位移角为性能参数,提出了钢筋混凝土桥墩在地震作用下处于5个性能水平的量化指标,并与新西兰、日本和美国加州等设计规范中的相关规定进行比较。结果表明:建议的不同性能水平下钢筋混凝土桥墩的位移角限值是合理的,可用于基于性能抗震设计时桥墩墩顶位移的确定。更多还原

【Abstract】 According to the failure characteristics of reinforced concrete(RC) bridge columns and the need of performance on the basis of anti-seismic design in bridge,RC bridge column performance levels,i.e.full operation,temporary operation,reparable operation,life safety,and collapse prevention were established.Combined with research achievement at home and abroad,quantitative decision indexes of bridge structure failure were established from point of view of socio-economics.Based on field investigations following a seismic event,quantitative indexes of performance levels for field seismic disaster investigation of RC bridge column were proposed.Based on the statistical data of 127 seismic performance tests of RC bridge columns with circular section subjected to flexural failure,regarded drift ratio as performance parameters,quantitative indexes for the five designated performance levels were put forward.The indexes were compared with the provisions among New Zealand standard,Japan design code,and California design code.The results show that the drift ratios of RC bridge column with different performance levels are reasonable which can be used to determine displacement of column top on the basis of anti-seismic design.更多还原