Research On Ultra-High-Rise Building Tower Crane Suspension Supporting System

In recent years,high-rise and ultra-high-rise buildings have got engineers' favorite due to their small land area occupied,rational use of space and attractive structure appearance.High-rise and ultra-high-rise buildings continue to emerge one after another with novel appearance,complex but reasonable structures which have become a major city landmark.Tower crane as main vertical transportation equipment in high-rise building construction restricts the construction progress and economic benefits directly.In some high-rise building construction,due to space constraints,the tower crane haves to suspend on outer steel frame construction.This requires designing a tower crane suspension supporting system according to the tower crane used and the actual situation.Therefore,to study and improve the tower crane suspension supporting system in high-rise construction has become a new topic with very real sense.The topic made the following research according to the actual project:Firstly,the tower crane suspension supporting system structure has been designed according to the actual condition.Based on tower crane installation location and its own performance and characteristics,the supporting structure composition programt is determined from the force and structural arrangement of the tower crane two angles.And the specific structure is modeled by finite element,and lay a foundation for the subsequent analysis.Then,the relationship between the supporting point stiffness and the force of supporting structure is studied.The stiffness of supporting point will change by changing the cross-sectional moment of inertia of the lower supporting steel beam or changing cross-sectional area of the upper supporting structure rods,so that the external force of the supporting system can be reduced to a reasonable range.This is instructive for design and installation of tower crane suspension supporting system with different stiffness.Secondly,the match of the main beam parameters in supporting system is studied.The relationship between the main beam parameters,such as cross-sectional moment of inertia,the angle of the main beam and oblique rod hinge point location is studied,and a reasonable match have been made for them to ensure the tower crane is perpendicular to the ground after it's installed on the tower crane suspension supporting system.This ensures the safety of the tower crane in high-altitude operations,provide a basis for the design of tower crane suspension supporting system.Finally,the form and structure of embedded parts which relates to floor strengthening is studied.And Abaqus FEA software is used to analyse the force of embedded parts,concrete walls and steel to ensure that the embedded parts have suffieient structural strength.According to the calculation results of the analysis to determine the reasonable form and structure of embedded parts,and they are applied at the construction site to test their rationality.The research results are applied to practical engineering that is the construction of Shenyang Forum 66 tower one with a height of 350.66m belonging to high-rise buildings to ensure the smooth construction of the project.The research methods of this topic provides theoretical basis and practical engineering experience which can be used for reference for the design of tower crane suspension supporting system in the construction of the similar buildings in the the future.