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《Journal of Building Structures》 2008-03
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Analysis on the influence of foundation settlement on the pre-set deformation value of New CCTV Building

GUO Yanlin,TIAN Guangyu,LIU Xuewu (Department of Civil Engineering,Tsinghua University,Beijing 100084,China)  
As to New CCTV Building,the deformation attributes to the loading affection resulted from the inclined towers and cantilevered structure system,but also the foundation settlement as well,which must be estimated to determine the construction and erection procedure.Since the two towers are built separately and the cantilever is protruded and closured in the air step by step,pre-set deformation value must be taken for the structure members to make sure that the cantilever will closure smoothly during the construction process and the structure will reach the designed status after the structural construction is finished.Based on the integrative model including foundation and super-structure which considers reciprocity of the soil,pile and super-structure,this paper evaluated the foundation settlement′s influence on the deformation of structure during erecting process and calculates the pre-set deformation value that took the foundation settlement into account.The pre-set deformation value by this method at the joint point of cantilever increased 11.9mm vertically(upward is positive direction),-16.6mm(south is positive direction) and 10.9mm(east is positive direction) horizontally.This paper validates that the integrative modeling method for calculating the pre-set deformation value is effective and the result is applied directly to the construction,which has been proved to be helpful in the closure process of the cantilever.
【CateGory Index】: TU433;TU31
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