Research On The Simulation Of Construction Process Of A Super High-rise Building Considering The Foundation Stiffness And The Mechanical Properties Of Joints With Construction Joints

Super high-rise building is located in the core of the urban,has the advantageous commercial effect.It tends to be a landmark building in a city.With the rapid economic development,China has established a large number of super high-rise buildings.So it is necessary to consider the influence of various factors on the structure in the design stage and construction stage to ensure the safety of the structure.As the traditional structural design analysis is not suitable for super high-rise structures,it is necessary to simulation analyze the super high-rise building.Based on a super high-rise project in karst region,study the effects of different construction schemes on the vertical deformation and internal force.Provide reference for the selection of construction scheme of super high-rise structure.The influence of various practical factors on the whole construction process is determined,and the basis for controlling the vertical deformation and internal force of the structure is provided.Based on the interactional analysis of structure,foundation and soil,the effect and regularity of the foundation stiffness on the structure are discussed.This paper analyzes the influence of the friction coefficient on the sides of the vertical construction joints and the influence of the longitudinal reinforcement ratio on the mechanical properties of the joint.The mian works and conclusion are shown below:(1)This paper introduces the basic theory of simulation and analysis of the whole construction process.According to the actual situation of the project,a simulation and analysis model is built.The whole process simulation and analysis of four different construction schemes of the inner and outer construction of the core-tube and the advanced construction of the core-tube.And the influence of different construction schemes on the structure is studied.(2)Based on three aspects of the leveling measures,concrete material properties and various factors for multiple variable simulation analysis to determine the impact of various factors on the simulation results the effect degree.It provides the basis for controlling the deformation and internal force of the structure.(3)The project is located in a region with strong karst development,and the traditional analysis of the floor slab has changed the original stress condition of the structure.The structural deformation and deformation of the structure are also neglected.In the whole process of construction simulation,the upper structure,the foundation and soil are analyzed,and the effect of the foundation stiffness on the whole model is discussed.The effect and regularity of foundation stiffness on the model are studied(4)A finite element analysis model of joints with vertical construction joints is established.The influence of the friction coefficient on the sides of the vertical construction joints and the influence of the longitudinal reinforcement ratio on the mechanical properties of the joint are analyzed.The results indicate that the mechanical properties of joint with vertical joints are not sensitive to the bending moment.However,when the shear force is controlled,the mechanical properties of the joints have a very significant impact,and even lead to the structure can not bear the load,so that the construction joints become weak parts.Therefore,the author puts forward two methods of "embedded" and "planting reinforcing bar" base on the finite element analysis.It shows that it has better mechanical properties compared with the vertical construction joints.