地震作用下高墩刚构桥倒塌分析
发布时间：2018-10-31 14:26
【摘要】：为了研究高墩刚构桥在地震作用下的倒塌问题,根据结构在地震作用下发生损伤累积而丧失承受竖向荷载的能力、最终发生倒塌破坏的机理,提出了基于墩顶竖向位移的倒塌判别准则;采用基于单地震动记录IDA的分析方法,得到了结构倒塌破坏的极限状态点和塑性变形特征。以一座最大墩高为178m的(100+3×200+106)m高墩刚构桥为背景,进行结构倒塌分析,并对其结构塑性变形特征进行研究。结果表明:高墩刚构桥墩顶竖向位移可作为倒塌破坏的特征响应;墩底、墩顶和系梁附近是结构塑性发展区。
[Abstract]:In order to study the collapse of rigid frame bridge with high piers under earthquake, according to the damage accumulation of the structure under earthquake and the loss of the ability to bear vertical load, the mechanism of collapse and failure is finally taken place. The criterion of collapse based on the vertical displacement of pier top is proposed. The limit state points and plastic deformation characteristics of collapse failure of structures are obtained by using IDA analysis method based on single ground motion records. Taking a (1003 脳 200106) m high pier rigid frame bridge with the maximum pier height of 178m as the background, the structural collapse analysis is carried out and the structural plastic deformation characteristics are studied. The results show that the vertical displacement of pier top of high pier rigid frame bridge can be regarded as the characteristic response of collapse and failure, and the plastic development zone is near the pier bottom, pier top and tie beam.
【作者单位】： 武汉理工大学交通学院;
【基金】：内蒙古自治区交通科技项目(NJ-2012-18)
【分类号】：U442.55
[Abstract]:In order to study the collapse of rigid frame bridge with high piers under earthquake, according to the damage accumulation of the structure under earthquake and the loss of the ability to bear vertical load, the mechanism of collapse and failure is finally taken place. The criterion of collapse based on the vertical displacement of pier top is proposed. The limit state points and plastic deformation characteristics of collapse failure of structures are obtained by using IDA analysis method based on single ground motion records. Taking a (1003 脳 200106) m high pier rigid frame bridge with the maximum pier height of 178m as the background, the structural collapse analysis is carried out and the structural plastic deformation characteristics are studied. The results show that the vertical displacement of pier top of high pier rigid frame bridge can be regarded as the characteristic response of collapse and failure, and the plastic development zone is near the pier bottom, pier top and tie beam.
【作者单位】： 武汉理工大学交通学院;
【基金】：内蒙古自治区交通科技项目(NJ-2012-18)
【分类号】：U442.55
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