Numerical Simulation Analysis And Application Of Stability Of Supporting Formwork System For Viaduct Construction

With the rapid development of the social economy,urban traffic has become very congested,and traditional roads have not been able to meet the needs of people,so the viaduct will follow.However,the structure of the viaduct is relatively complicated and has a large span,and the requirements for the required supporting system are also very strict at the time of construction.Since the high-supporting system belongs to the temporary bearing system,the way of transferring the load and the calculation model are very complicated,and it is subject to many other influencing factors.If the stability of the entire supporting system cannot be guaranteed,it will lead to the construction.The phenomenon of the collapse of the building(structure)immediately threatens the safety of the life and property of the staff,delays the construction period,and has serious social impact.Therefore,in view of the force characteristics of the high-span system,the model and the stability bearing capacity analysis of the high-supporting system are studied.According to the force characteristics of the high-strain system,the stiffness matrix of the pole and the stiffness matrix of the crossbar are checked according to Euler's formula,the theory of compression bar and the finite element method,and the whole height is established by MIDAS GEN finite element software.The model of the formwork is systematically analyzed for its stable bearing capacity and construction measures.The main contents are: Introducing the Euler's formula and the theory of the pressure bar stability to calculate the ultimate bearing capacity of a single pole,and according to the pole two The length coefficient of the pole is calculated by the difference of the end constraint conditions.Based on the finite element method,the whole high-span system is split into rods,large crossbars and small crossbars,and their stiffness matrix formulas are analyzed and checked.The stability and principle of the high-supported support system were analyzed.Taking a span of the viaduct of Yancheng Fan Road section in Jiangsu Province as an example,the design and parameters of the viaduct are analyzed,and the load and wind load of the cast-in-place T-beam to the high-span die are calculated.And the quantitative analysis method is used to check whether the mold system has the effect of sweeping the rod,whether there is scissors,and the distance between the step and the pole to the stability of the whole model.Finally,based on the results of quantitative analysis,give reasonable suggestions.The research results of this paper have certain practical value for the construction safety of the viaduct construction and the reduction of the collapse accident of the formwork system.