The Simulation Analysis Of Concrete Crack Control In Tianjin Expressway Sunflower Type Arch Bridge Construction

The crack can affect the concrete the integrity, waterp-roof and the Durability in use,how to control the crack effectively is the key of concrete construction success or failure.The hydration heat which releases in the solidification process of mass concrete can have the great temperature change and the contraction function, which produces the temperature stress and the contraction stress which cause the concrete to appear the crack are the primary cause, must consider the concrete crack for this in the concrete construction process.Concrete itself has the contraction characteristic, which causes the crack of the ultra-long concrete structure in the maintenance process become more and more common.This kind of structure along with the contraction production, the contraction stress increases gradually from the structure both sides to among, when the biggest contraction stress surpasses the concrete tensile strength, the concrete structure cracks from middle, forms the penetrability crack.In order to provide certain basis for being able to choose and determinate construction plan, take the reasonable effective construction measure to control the concrete the dehiscence,this article unifies the Tianjin sunflower type arch bridge project practice, using large-scale finite element software ANSYS to carry on the simulation analysis of temperature stress of the bridge pier mass concrete structure produced by the hydration heat and contraction stress of ultra-long concrete arch structure produced by the contraction.Through the simulated computation and with actual data contrast analysis, propose some suggestions of crack control in the mass concrete and ultra-long concrete structure construction process.