摘要
以深水高墩连续刚构桥为例,分析水体对桥梁地震响应的影响,验证了水体对深水高墩连续刚构桥地震响应的影响不容忽视,且内域水是主要影响因素;分析罕遇地震水平地震反应,验证了桥墩的变截面设计能够实现塑性铰仅出现在墩顶的期望,避免了塑性铰出现在位于深水区的墩底以及由此导致的震后修复工作困难过大、费用过高的问题;进行了液体黏滞阻尼器参数分析与比选,实现了以较小的经济代价保持桥墩弹性,提高结构抗震性能的目的。
A continuous rigid frame bridge with high piers in deep water reservoir was used as an example to verify that the water effects cannot be ignored and water within the piers has the main influence by analyzing the water effect on the seismic response of the bridge. With seismic response analysis under severe earthquake level, it was verified that the pier design with variable cross- section of the bridge achieves the expectation that the formation of plastic hinge is only at the top of the pier and the formation of plastic hinges at the bottom of the piers can be avoided which were in deep water region. The problem of the difficult post-earth- quake retrofit with expensive cost in deep water was also avoided in the pier design. Based on the parameters analysis and compar- ison of Fluid viscous damper under severe earthquake level, the selection of Fluid viscous damper kept the piers elastic which en- hanced the structural seismic performance at a low cost.
出处
《中国科技论文》
CAS
北大核心
2016年第19期2209-2213,共5页
China Sciencepaper
关键词
抗震设计
深水刚构桥
水动力影响
塑性铰设置
阻尼器参数分析
seismic design
continuous rigid frame bridge in deep water
hydrodynamic effect
plastic hinge set
damper parameteranalysis
