钢筋布设对GFRP-混凝土组合板弯曲性能影响的研究  

STUDY ON THE INFLUENCE OF REINFORCEMENT ARRANGEMENT ON THE FLEXURAL PERFORMANCE OF GFRP-CONCRETE COMPOSITE DECKS

作　　者：佟兆杰 陈宜言 黄侨[2] 许翔[2] TONG Zhao-jie;CHEN Yi-yan;HUANG Qiao;XU Xiang(Shenzhen Municipal Design&Research Institute Co.,Ltd.,Shenzhen 518029,China;School of Transportation,Southeast University,Nanjing 211189,China)

机构地区：[1]深圳市市政设计研究院有限公司,深圳518029 [2]东南大学交通学院,南京211189

出　　处：《复合材料科学与工程》2020年第6期51-56,共6页Composites Science and Engineering

基　　金：中国博士后科学基金资助项目(2019M653085);中国交通建设股份有限公司资助项目(271400140114)。

摘　　要：钢筋的布设可以提高GFRP-混凝土组合桥面板的弯曲刚度,改善组合板的延性,降低组合板的造价。此外,配筋组合板具有优于钢筋混凝土板的耐久性。本文基于截面分析法对配筋组合板的弯曲性能进行研究。首先基于平截面假定推导配筋组合板的截面分析模型,并通过2片试验板进行验证。然后采用截面分析法对钢筋布设与组合板刚度及延性的关系进行分析。分析表明:钢筋面积、GFRP底板厚度都可以提高组合板的弯曲刚度;钢筋面积越大组合板延性越差,GFRP底板越厚组合板延性越差;可以通过增加钢筋面积、减少GFRP底板厚度的方法提高组合板的刚度,并使组合板具有一定延性;当钢筋面积和GFRP板尺寸不变时,可以使钢筋尽量靠近桥面板底面布置,从而获得较好的弯曲刚度及延性。The steel bars could increase the flexural stiffness of GFRP-concrete composite bridge decks,improve its ductility and reduce the cost.Moreover,the durability of composite decks with steel bars was better than that of reinforced concrete decks.The flexural performance of composite decks was investigated based on the sectional analysis method.Firstly,the analysis model of composite decks with steel bars was established based on the plane section assumption,and verified through experimental tests of two test decks.Then,the relationship between flexural stiffness,ductility and reinforcement arrangement was studied using the sectional analysis method.The analysis indicates that the area of steel bars and the thickness of GFRP bottom plates could increase the flexural stiffness of composite decks.A larger area of steel bars results in a lower ductility,and a thicker GFRP bottom plate result in a lower ductility.The method of increasing reinforcement area and reducing GFRP bottom plate thickness could improve the flexural stiffness and the ductility.When the size of GFRP plate and the reinforcement area are constant,the steel bar could be placed as close as possible to the bottom surface of bridge decks to obtain better flexural stiffness and ductility.

关 键 词：桥梁 GFRP-混凝土 截面分析法 钢筋 弯曲刚度 延性 

分 类 号：TB332[一般工业技术—材料科学与工程]