Design And Research On Adaptive System Of Prestressed Tower Crane

At present,the state is vigorously promoting the development of prefabricated construction,and it is required to increase the proportion of prefabricated building materials.However,the QTZ125 flat-head tower crane currently in use has a low lifting weight,uncertain position,and inaccurate lifting position.This affects the construction efficiency of prefabricated construction,so it needs to be redesigned under the existing structure.This project is to develop an assembly tower crane for assembly building based on QTZ125 flat head tower crane.This article is designed for tower crane steel structure.It mainly studies how to provide large lifting weight and deformation for tower crane design under the premise of ensuring the safe operation of tower crane.Small,low cost steel structure design.This paper proposes an adaptive system for prestressed tower cranes for flat-head tower cranes,which can increase the lifting weight of the flat-head tower crane,reduce the deformation of the crane’s suspension,and improve the tower’s stress.Tower crane design provides a new design idea with important theoretical and practical values.(1)Study the prestress principle of steel structure,the principle of tower crane balance moment and the principle of prestressed boom.Introduce the structure and principle of adaptive system of prestressed tower crane and design the basis of QTZ125 flat head tower crane.Self-adaptive system of prestressed tower cranes to determine the lifting torque curve of adaptive prestressed tower cranes,the mass of fixed balance weights,the size and the movable range of movable counterweights,and their prestressed adaptive boom systems,balance arms and The design of the heavy arm structure was performed to ensure the safety of the tower crane.(2)Parametric modeling of QTZ125 flat-head tower crane and adaptive prestressed tower crane is performed.The static analysis is performed under various dangerous working conditions to determine the stress of the adaptive prestressed tower crane and the liftingcapacity of the tower crane.The deformation of the crane’s suspension load is compared to verify the feasibility and advancement of the adaptive system design of the prestressed tower crane.(3)Analyze the influence of the balance arm suspension point on the adaptive prestressed tower crane at different positions,and obtain the maximum stress of the boom,the deformation of the suspension load,the balance arm stress and the maximum deformation data under hazardous conditions.And draw a graph for analysis,under the premise of balance the normal work of the arm,in order to maximize the lifting performance of adaptive prestressed tower crane to determine the balance arm lifting point position.