The Model Test Study Of Three Span Simple Supported To Continuous Grider Bridge On Vehicles-brdige Coupling Vibration

In3×30m simply-supported to continuous beam bridge and the Dongfeng-EQ3166dump truck forthe test prototype. Deducing from the similar scale of model test apply to theory of similarity.According to the similar ratio, respectively, making the bridge model and vehicle model. The bridgemodel is made of plexiglass, and the vehicle model is made of steel.Designing and producing the model bridge substructure, the vehicle driving system, running guidancesystem, deceleration system, which makes the model vehicle can operate accurately in bridge.Measuring the characteristic values of model vehicle and bridge model to ensure they can meet therequirements of vehicle-bridge coupled model test. Testing model system of static load to determinethe static deflection and strain of.model bridge under the action of static model carFirst of all,do the test of simply supported beam bridge of vehicle-bridge coupling vibration,determinating the dynamic deflection and strain of model bridge that under the condition of modelvehicle which is in different speed, lane position and bridge deck, and then draw the correspondingimpact coefficient and strain amplification factor. At last, find out the variation laws of the influencesfactors,which include of the speed of the vehicle, driving position, surface of the bridge.Turnning the simply supported beam bridge into continuous beam bridge, and make sure the reliabilityof structure through test and analysis. Then,do the same test as simply supported beam bridge,determinating the dynamic deflection and strain of model bridge that under the condition of modelvehicle which is in different speed, lane position and bridge deck, and then draw the correspondingimpact coefficient and strain amplification factor. At last, find out the variation laws of the influencesfactors,which include of the speed of the vehicle, driving position, surface of the bridge.