地基与重力式桥墩相互作用的非线性地震反应  

Nonlinear seismic analysis for gravity bridge pier and foundation

作　　者：杨光[1] 张树山[2] 崔军[3] 

机构地区：[1]黑龙江工程学院路桥系,黑龙江哈尔滨150050 [2]黑龙江龙建路桥股份有限公司,黑龙江哈尔滨150010 [3]杭州市城市建设科学研究所,浙江杭州310006

出　　处：《哈尔滨工业大学学报》2003年第10期1278-1280,共3页Journal of Harbin Institute of Technology

摘　　要：针对在强烈地震作用下软弱地基上的桥墩有可能会发生桥墩基础提离现象的问题,分析了非线性地基土与非线性重力式桥墩相互作用体系下的地震反应,上部结构恢复力模式取为理想弹塑性模型,下部地基土采用有试验支持的无拉力Winkler弹塑性固结模型.并对一重力式桥墩进行了计算分析,分析结果表明,对于浅基的重力式矮墩,地基的破坏往往先于桥墩的破坏,在进行桥梁抗震设计时,考虑土与桥墩的共同作是必要的.For possible separation of piers from weak groundsill during strong earthquake, the interaction between nonlinear foundation and gravity bridge pier have been analyzed with unearthly elasto-plastic model used as super structural resilience model and the Winkler elasto-plastic concretion model used as under groundsill model. The conclusion is that bridge pier is destroyed after groundsill, and the interaction between pier and groundsill must be considered in seismic analysis.

关 键 词：地基 重力式桥墩 非线性地震反应 提离现象 力学模型 运动方程 

分 类 号：U443[建筑科学—桥梁与隧道工程]