Inwestigation Of Structure Behaviors Of A Novel Deck Slabs Systems

In the past decade, the corrosion of steel reinforcement embedded in concretebridge deck has been the cause of major structural deterioration. In recent years, oneeffective solution to this problem is replacing steel reinforcement with glass fibrereinforced polymer (GFRP). But, It is known that present design procedures causesGFRP reinforcement percentage (1.5%-2.8%) is higher than steel reinforcement radio(1.0%-1.7%) by analyzing GFRP reinforced concrete design standard. the reason ofcausing the problem is that compressive membrane action caused by lateral restraint isignored by present design procedures. The value of PH is13in early concrete casting.So the silicon of GFRP will be destroyed if the resin layer on GFRP appearance ismishandled. Then, in this paper, it is proposed that a novel deck slabs systems isrestrained by GFRP bars set external.For investigating structural behaviors, Ⅰseries of eight full-scaled deck slabsstrips experiments and Ⅱseries of three third-scaled deck slabs experiments werecarried out in this paper. Ⅰseries of deck slabs strips experiments considered theinfluence of lateral restraint stiffness, concrete strength and thickness of arch onstructural behaviors, especially arching action and ultimate loading capacity. Ⅱseriesof deck slabs experiments considered the influence of the with of supporting beam onstructural behaviors, especially arching action and ultimate loading capacity. In thispaper finite element soft ABAQUS was adopted to simulate experimental models.Then, the finite element parameters analysis was carried out basing on the goodconsistency between the results of numerical evaluation and the experimental results.From the results of experiment analysis, it was presented that the structuralparameters of laterally restraint stiffness、concrete strength and thickness of arch hadevident effect on arching action and ultimate loading capacity of deck slabs strips, andthe width of supporting beam influence the structure behaviors of deckslabs,especially arching action and ultimate loading capacity. Comparing to traditionalbridge deck slabs, the novel bridge deck slabs showed obvious advantages of structureperformance. Especially, the ultimate loading capacity was raised50%-60%. Throughthe finite element parameter analysis, it was recognized that the lateral restraintstiffness didn’t have effect on ultimate loading capacity of deck slabs strips when it surpassed, and lateral restraint stiffness on arching action effective area、concretestrength and thickness of arch all had obvious effect on the behaviors of bridge deckslabs.The novel arched bridge deck slabs that are restrained by GFRP bars set externalon support beam will improve structure durability, reduce maintenance cost, solve theproblem the interference of transportation caused by replacing steel of bridge deckslabs and the destruction of the environment, be helpful to establish sustainabledevelopment bridge systems,...