竖向荷载作用下地基弹簧刚度对超高层建筑桩筏基础筏板的影响  

Effect of Stiffness of Ground Springs on the Plate of Piled-Raft Foundations of Super High-Rise Buildings under Vertical Loads

作　　者：雷小虎[1] 巢斯[2] 

机构地区：[1]同济大学土木工程学院建筑工程系,上海200092 [2]同济大学建筑设计研究院,上海200092

出　　处：《结构工程师》2011年第1期55-60,共6页Structural Engineers

摘　　要：采用将超高层建筑桩筏基础中桩对筏板的作用等效为作用在桩顶处的竖向点弹簧的简化的共同作用分析方法,分析在竖向荷载作用下考虑整体上部结构刚度时不同的弹簧刚度取值对某超高层结构基础筏板的弯矩、变形及桩顶反力的影响。首先,采用共同作用迭代法进行弹簧刚度分布及取值的计算;然后,选取五组近似的弹簧刚度分布;最后,计算五组弹簧刚度取值下的筏板弯矩、沉降、桩顶反力。分析得出结论为类似工程提供参考。This paper adopts the simplified method which uses the vertical springs instead of the piles under the raft of the piled raft foundation in a super highrise building and considers the interaction between the piled raft foundation and the superstructure to calculate the moment and the deformation of the raft and the reaction of the piles.With different stiffness values of springs,the effects of stiffness of springs upon the raft behaviors were analyzed.In the end,the conclusions which other similar projects can hold as useful references were obtained.

关 键 词：弹簧刚度 超高层建筑 桩筏基础 筏板 

分 类 号：TU473.1[建筑科学—结构工程]