关键词: GFRP, 桥面板, 压缩薄膜效应, 结构试验

Abstract: With the consideration of compressive membrane action (CMA) in the structural design of concrete bridge deck slabs reinforced with GFRP bars,the reinforcement percentages and construction costs could be decreased．Therefore,a series of one-third scaled experimental tests of GFRP reinforced concrete bridge deck slabs under static patch loads was carried out． In the experimental study,the influences from some structural variables were investigated,which included widths of supporting beams,reinforcing materials and reinforcement percentages． In this study,some structural parameters,such as loading capacity,stress＆strain relationship,cracking patterns,were measured and observed in the different stages． The structural behaviours of GFRP reinforced concrete bridge deck slabs were discussed,including displacements of supporting beams,cracking patterns and failure mechanism． The results were used to study the effects of CMA and influenced from this structural phenomenon on structures． In this study,it was found that the increase in lateral restraint stiffness could enhance load-carrying capacities significantly． However,the effects of reinforcement percentages were not obvious． Furthermore,current design standards underestimate the load-carrying capacities without consideration of CMA．

Key words: GFRP, bridge deck slabs, CMA, experimental test