Study Of Structural Behaviour Of Reinforcement-free Concrete Deck Systems Constructed With GFPR

Reinforced concrete beam slab bridge structure because of its good mechanicalperformance, as well as the low cost advantage, is widely used in highway bridge construction.Normally alkaline wrapped in reinforced concrete, steel has certain corrosion resistance. Inreality, the reinforced concrete bridge is usually working with cracks, steel exposedenvironment, which cause steel corrosion, outer protective layer falls off, it will affect thebearing capacity of structure, increase the maintenance cost of the bridge. Fiber reinforcedpolymer reinforced materials (FRP bar) innate resistance to chemical corrosion, at the sametime, it has the advantage of light deadweight, high strength, expansion coefficient with theadvantages of similar concrete bridge for civil engineers to solve the corrosion and improvethe use fixed number of year of hope. The FRP reinforced concrete structure design codereinforcement ratio is higher than reinforced concrete slab reinforcement ratio, what’s moreFRP reinforcement material price is higher than that of steel prices, therefore is not widelyused.Research has shown that traditional beam plate compressed film effect exist in theconcrete bridge, the bridge panel design and considering the effect, can reduce thereinforcement ratio, reduce construction cost. In order to be able to more significantly reduceconstruction cost, this topic can design a new type of bridge structure, using GFRP bolt aslateral restraint component, bridge panel reinforced material, combined with compressed filmeffect of model structure design and calculation. Through the experimental analysis and themethod of finite element simulation of prefabricated GFRP reinforced concrete bridge undertyre load working performance and failure mechanism are analyzed. This article mainly hascarried on the several aspects work:1. Change the width of the support beam, external GFRP bolt spacing, the types ofsupport beam, bridge deck cross section forms and loading position and form of bridge panelof1:3proportion to reduce the static loading test, the measurement model in load bearingcapacity, strain and deformation in the process of the data, the study of the basic mechanicalproperties of the structure of the new panel, the bearing capacity calculation method werediscussed.2. Research and analysis of bridge deck under tyre load, lateral displacement of supportbeam, fracture morphology and failure form of bridge panel, reveal the changes of compressed film effect and affect the performance of the structure.3. Using the general finite element software ABAQUS to simulate the process of staticload model, the simulation results can better agreement with the experimental data, fullyproved the rationality of the finite element model, on the basis of the integral panel modelparameters are analyzed.Test and finite element analysis, the author found out that support beam width, externalGFRP bolt and bridge deck cross section form has a larger effect on the bearing capacity ofthe whole panel. This new type of bridge deck structure to guarantee that the bridge structureunder the condition of bearing capacity and construction cost is not affected, effectivelyimprove the durability of the structure, reduce the maintenance cost, solve the frequentreplacement of reinforced bridge panel damage to the interference of the transportation andthe environment.