Construction Monitoring Analysis of Upper Structure for Steel Truss Transfer Floor
Steel truss transfer floors,as an important structural form,play a bearing and transformation role in tall buildings.Due to their light self-weight,fast construction speed,and the ability to provide large interior spaces,they are widely used in new tall residential and office buildings.The steel truss transfer floor has a significant difference in vertical stiffness between the two core tubes on both sides.Under the influence of upper loads and vertical deformations between them,the connection points on both sides of the transfer floor and key components bear significant pressure and occur deformation,which poses severe challenges to construction safety and the overall structural stability.Based on the Qinhuangdao Jinmeng Bay Phase Ⅱ residential project,strain and deformation monitoring points were arranged for key parts and members of the steel truss transfer floor during construction.The finite element software MIDAS/Gen was used to create a three-dimensional model of the overall structure,considering parameters such as concrete shrinkage and creep,to simulate the construction process of the upper structure of the steel truss transfer floor.The simulation results were compared with actual monitoring data.The results showed that during the construction of the upper floors,the maximum stress was located at the mid-span of the first truss,and the overall stress level of the steel truss transfer floor was lower than the yield stress of the components,providing sufficient safety margin to withstand subsequent construction loads.The maximum vertical deformation occurred at the mid-span of the second truss,and the deformation was within a reasonable range.The stress and deformation simulated values of the steel truss transfer floor monitoring points matched well with the actual monitoring data,verifying the accuracy of the simulation method.
tall buildingssteel trussestransfer floormonitoringfinite element analysisstressdeformation
万方数据
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