桩径对桩-土-结构共同作用时的抗震性能的影响  

Influence of Pile Foundation Diameter to Aseismic Capability of Constructions Based on Pile-soil-structure Interaction

作　　者：黄大明[1] 王敏[2] 

机构地区：[1]同济大学建筑设计研究院,上海200092 [2]上海市政工程设计研究总院,上海200000

出　　处：《建筑结构》2008年第9期89-91,88,共4页Building Structure

摘　　要：根据上海某高层建筑地基基础结构数据建立软土地基上桩基础高层建筑平面动力有限元计算模型,以横观各向同性材料模拟软土地基,弹性阻尼人工边界模拟地基半无限体,薄膜单元模拟桩-土间接触滑移性能,并考虑桩-土-结构相互作用,采用上海地铁某车站地震监测数据作为地震波输入进行动力有限元计算。基于此计算模型,在其他条件不变的情况下选择各种桩基直径进行计算,根据计算结果分析讨论了在该模型条件下桩径选择对上部结构以及桩基础整体抗震性能的影响,提出了优化方案,进行总结并得出结论。2D dynamic FEM model of high building with pile foundation on soft ground is created with data of one high building with frame structure in Shanghai. Transversely isotropy material is used to simulate the soft ground; spring-dump artificial boundary to semi-infinite ground; film element to the contact and slippage performance of pile and soil; and pile-soil-structure interaction is considered. The seismic monitor data besides one subway station in Shanghai is used as input earthquake wave. With this model, series of dynamic FEM computing are proceeded with different pile diameter while holding all other parameters. The influence of pile diameter selection to the anti-seismic capability of building and pile foundation is analyzed based on the compute results, after which optimized scheme is advanced and conclusions are drawn.

关 键 词：动力有限元 桩基础 桩径 地震反应 共同作用 

分 类 号：TU311.3[建筑科学—结构工程] U442.55[建筑科学—桥梁与隧道工程]