Research On Stability Of Hydraulic Self-climbing Formwork Structure And Optimization Of Climbing Unit

With the rapid development of China's economy,super high-rise buildings have sprung up in major cities in China.In order to cope with the complicated super-high-rise buildings,new construction techniques have emerged.Hydraulic self-climbing formwork construction is the most advanced super highrise building construction technology.It has the advantages of convenient operation,high degree of automation and fast construction speed.It plays a vital role in the construction of super high-rise buildings.However,due to its short time,there are few studies on the structure of the Hydraulic self-climbing formwork,and the corresponding theoretical system is not mature enough.Therefore,it is necessary to do more study and explore on the hydraulic self-climbing formwork system structure.This paper studies the structure of the hydraulic self-climbing formwork system based on the landmark buildings in the development block of the canal core area of Tongzhou District.The on-site load investigation was carried out on the hydraulic self-climbing system used in the construction of the core tube project.The load of the climbing formwork body in different construction stages was statistically analyzed.The load distribution of each platform under the working state of the hydraulic self-climbing formwork system was summarized.Combined with the actual situation of the project site,the beam,the column and the diagonal bracing of the load-bearing tripod of the hydraulic selfclimbing system outside the core tube,and some key components such as the upper platform column are monitored under the complete construction cycle.The force characteristics and stress changes of self-climbing mold construction during the climbing stage of the climbing frame are analyzed.On the basis of the previous load investigation,the finite element software ANSYS was used to model the hydraulic self-climbing formwork frame outside the core tube of the project.The force of each member of the Hydraulic self-climbing formwork frame during the climbing stage was calculated,and the stress analysis was carried out to evaluate the overall stability and safety of the Hydraulic self-climbing formwork frame.The finite element calculation values of the key members of the Hydraulic self-climbing formwork frame and the actual monitoring values of the project site were compared and analyzed in detail.The accuracy and reliability of the finite element software ANSYS for the Hydraulic self-climbing formwork frame of this project are verified,which provides theoretical support for the optimization of the hydraulic self-climbing formwork and the finite element analysis calculation.At the same time,it provides a method reference for the finite element simulation analysis of similar hydraulic self-climbing system.The climbing unit of the hydraulic self-climbing formwork system outside the core tube of the project was optimized.Based on the real-time monitoring and finite element model analysis of the self-climbing formwork frame,the finite element modeling and calculation of the optimized hydraulic self-climbing formwork frame is carried out.Based on the combination of different load effects,the hydraulic self-climbing formwork frame was analyzed and calculated under the construction conditions,climbing conditions and shutdown conditions.And extract the internal force of the rod which is more prominent in axial load in the finite element calculation,and carry out the stable calculation according to the formula given by the specification.The optimized hydraulic self-climbing formwork system reduces the climbing position from 3 to 2,enhances the operability of the climbing operation,reduces the cost,and increases the economic efficiency of the project.It provides a reference for the climbing unit arrangement of hydraulic self-climbing formwork system in similar high-rise construction in the future.