桩长对L型带裙房高层建筑的结构-基础-地基共同作用的影响  

Concurrent functional influence research of L-shaped high-rise building with different pile length

作　　者：刘德稳[1,2] 孙微微[2] 李祥秀[3] 陈虎[4] 夏冰华[2] 

机构地区：[1]广州大学教育部工程抗震减震与结构安全重点实验室,广东广州510405 [2]西南林业大学土木工程学院,云南昆明650000 [3]北京工业大学建筑工程学院,北京100022 [4]西南交通大学土木工程学院,四川成都610000

出　　处：《湖南科技大学学报（自然科学版）》2013年第3期66-71,共6页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：国家重点基础研究发展计划973项目(2012CB723304);十二五国家科技支撑计划项目(2012BAJ07B02)

摘　　要：建立了某实际工程L型带裙房高层建筑三维分析模型,采用分层地基模型模拟地基土,引入缝连接单元,对不设缝带裙房高层建筑进行了上部结构-桩筏基础-地基共同作用分析,主要讨论主楼和裙房的桩长变化对桩筏基础的影响,研究表明:随着主楼桩长增加,主楼与裙房基础的平均沉降以及它们之间的沉降差减小,减小趋势趋于缓慢,对于基础底板弯矩,总体上随桩长的增加而增加,增加趋势变缓;裙房桩长增加,主楼沉降量变化不大,裙房沉降量减小,裙房分担主楼荷载的比例增加,裙房倾斜先增加后变化趋于平缓,而主楼倾斜减小.Three- dimensional analytical model was built on a L- shaped high -rise building with podium, layered ground model was adopt to analog subsoil, joint connection unit was introduced, a combined action analysis was maken that of upper - structure - piled raft foundation - ground on high - rise podium buildings that do not set up joint and influence were mainly discussed that of change of pile length of main building and podiums on piled raft foundation. It indicated that, with the increase of pile length of main building, average settlement of main building and podium foundation and settlement difference between them reduced decreases slowly. Generally, bending moment of foundation mat increases slowly with pile length. If pile length of podiums increases, settlement amount of main building has no an obvious change. If settlement amount of podiums decreases, the proportion at which podiums share load of main building increases. Tilt of podiums increases and then tends to drop off, while tilt of main building decreases.

关 键 词：L型带裙房的高层建筑 结构-基础-地基共同作用 分层地基 桩长变化 

分 类 号：TU973.23[建筑科学—结构工程]