Research On The Application Of Column-mounted Boom Tower Crane In Super High-rise Building Constructio

In recent years,with the accelerating urbanisation process,the demand for super tall buildings is increasing and moving jib tower cranes are being used more and more widely due to their many advantages.This new type of tower attachment scheme is used for the first time in the construction of supertall buildings.Due to the large load of the movable tower,the impact on the building structure and support system is yet to be studied.This thesis takes the 375 m supertall project of Guangzhou Guang Shang Centre as an example and uses numerical simulation analysis to study the impact of the column-mounted movable tower on the building structure and support system.The main research content and results include the following:In order to adapt to the special characteristics of the building structure,a six-support under-supported tower crane support system is designed,and its specific composition and main advantages are introduced.Based on the actual construction situation,the construction techniques for the installation of the hanging column type movable tower crane support system,vertical transfer of the support system and climbing of the main body of the tower crane are studied.The finite element analysis software is used to model and carry out elasto-plastic analysis on the column-mounted movable tower crane support system,to obtain the attachment reaction force of the tower crane support system under different working conditions,and to study the distribution law of the attachment reaction force of the movable tower crane support system.According to the calculation results of the tower support system bearing reaction force,the stress and displacement of the climbing bracket of the moving arm tower support system are analysed,the maximum stress and displacement of the climbing bracket under different working conditions are obtained,and the changes of the stress and displacement with the rotation of the tower are studied.The overall model of the structure is established by using Yingjianke software,and the influence of the working load of the tower on the performance of the overall structure such as self-oscillation period,stability,overturning resistance and lateral displacement resistance is studied.The finite element software is applied to establish the attachment node model of column-mounted movable jib tower crane,analyse the force situation of tower attachment node connection and attachment giant column,and propose attachment node reinforcement measures according to the results.The results of the research work were successfully applied in Guangzhou Guang Shang Centre project with good results,providing reference for the construction of similar super tall buildings.