樁徑對樁-土-結(jié)構(gòu)共同作用時的抗震性能的影響
黃大明1，王敏2
- 摘 要
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(1 同濟大學建筑設計研究院，上海 200092； 2 上海市政工程設計研究總院，上海 200000)［摘要］根據(jù)上海某高層建筑地基基礎結(jié)構(gòu)數(shù)據(jù)建立軟土地基上樁基礎高層建筑平面動力有限元計算模型，以橫觀各向同性材料模擬軟土地基，彈性阻尼人工邊界模擬地基半無限體，薄膜單元模擬樁-土間接觸滑移性能，并考慮樁-土-結(jié)構(gòu)相互作用，采用上海地鐵某車站地震監(jiān)測數(shù)據(jù)作為地震波輸入進行動力有限元計算。基于此計算模型，在其他條件不變的情況下選擇各種樁基直徑進行計算，根據(jù)計算結(jié)果分析討論了在該模型條件下樁徑選擇對上部結(jié)構(gòu)以及樁基礎整體抗震性能的影響，提出了優(yōu)化方案，進行總結(jié)并得出結(jié)論。［關(guān)鍵詞］動力有限元；樁基礎；樁徑；地震反應；共同作用Influence of Pile Foundation Diameter to Aseismic Capability of Constructions Based on Pile- soil-structure InteractionHuang Daming1， Wang Min2(1 Architectural Design & Research Institute of Tongji University,Shanghai 200092,China; 2 Shanghai Municipal Engineering Design General Institute,Shanghai 200000,China)
Abstract: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 selectio
n 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.Keywords:dynamic FEM; pile foundation; pile diameter; anti-seismic; interaction; response作者簡介：黃大明，男，工學碩士，E-mail: dm_huang@126.com。參考文獻
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