钢板-GFRP组合桥面板受弯性能试验与理论分析
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摘要
基于玻璃纤维增强复合材料(Glass Fiber Reinforced Polymer,简称"GFRP")具有轻质高强、耐腐蚀等优点,提出一种新型组合桥面板,即在钢板表面粘贴GFRP板,作为正交异性钢桥面板的防水和防腐蚀层,兼有增强钢板刚度的作用。在对组成材料材性测试的基础上,对组合桥面板试件在正弯矩和负弯矩作用下进行四点弯曲试验,测出各试件的荷载-位移曲线、荷载-应变曲线;通过换算截面理论推导出钢板-GFRP组合桥面板的刚度、跨中挠度和应力计算公式,并与试验值对比;在四种铺装模型下运用有限元软件分别对正交异性钢板进位移和应力分析。研究结果表明:钢板表面粘贴GFRP板可以有效提高钢板的屈服承载能力和刚度,降低钢板表面应力和开裂风险;钢板-GFRP组合桥面板弯曲性能的理论计算值与试验值吻合性较好。
Based on the glass fiber reinforced polymer( GFRP),which has the advantages of light weight,high strength,corrosion resistance,a new type of composite bridge deck was puts forward. GFRP plates were sticked on the surface of steel deck plate and they were took as orthotropic steel bridge deck waterproofing and anti-corrosion layer,which plays a critical role of enhancing the stiffness of steel plate. On the completion of a test for the material performance of composite bridge deck,the four-point bending test for the composite bridge deck under the positive and negative bending moment was implemented. The load-deformation curve and load-strain curve of the specimens were obtained from the test. The stiffness,the mid-span deformation and stress calculation formulation of steel plateGFRP composite bridge deck were deduced according to conversion section theory. In addition, making a comparison between theoretical values and the experimental values,deformation and stress analysis of orthotropic steel plate by using finite element software under four pavement models,it is concluded that GFRP plate sticked on the surface of steel plate can effectively improve bearing capacity and stiffness of steel plates,reduce steel surface stress and the risk of cracking. Theoretical value of steel plate-GFRP composite bridge deck bending performance is consistent with the experimental value well.
Based on the glass fiber reinforced polymer( GFRP),which has the advantages of light weight,high strength,corrosion resistance,a new type of composite bridge deck was puts forward. GFRP plates were sticked on the surface of steel deck plate and they were took as orthotropic steel bridge deck waterproofing and anti-corrosion layer,which plays a critical role of enhancing the stiffness of steel plate. On the completion of a test for the material performance of composite bridge deck,the four-point bending test for the composite bridge deck under the positive and negative bending moment was implemented. The load-deformation curve and load-strain curve of the specimens were obtained from the test. The stiffness,the mid-span deformation and stress calculation formulation of steel plateGFRP composite bridge deck were deduced according to conversion section theory. In addition, making a comparison between theoretical values and the experimental values,deformation and stress analysis of orthotropic steel plate by using finite element software under four pavement models,it is concluded that GFRP plate sticked on the surface of steel plate can effectively improve bearing capacity and stiffness of steel plates,reduce steel surface stress and the risk of cracking. Theoretical value of steel plate-GFRP composite bridge deck bending performance is consistent with the experimental value well.
引文
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[10]王文前.装配式钢-RPC轻型组合桥面结构[D].长沙:湖南大学,2013.
[2]Daly A F,Cuninghame J R.Performance of a fibre-reinforced Polymer bridge deek under dynamic wheel loading[J].Composites Part A:Applied Science and Manufacturing,2006,37(8):1180-1188.
[3]Keller T,Zhou A.Fatigue behavior of adhesively bonded joints composed of pultruded GFRP adherents for civil infrastructure applications[J].Composites Part A:Applied Science and Manufacturing,2006,37(8):1119-1130.
[4]冯鹏,叶列平.GFRP空心板静载试验研究及分析[J].工业建筑,2004,34(4):15-18.
[5]冯鹏,叶列平.FRP结构和FRP组合结构在结构工程中的应用与发展[C]//第二届全国土木工程用纤维增强复合材料(FRP)应用技术学术交流会论文集.昆明:中国土木工程学会,2002:51-63.
[6]冯鹏,叶列平.FRP夹心桥面板及新型FRP组合桥面板[C]//中国公路学会桥梁和结构工程学会2002年全国桥梁学术会议论文集.海口:中国公路学会,2002:723-731.
[7]倪章军.GFRP桥面钢纵梁组合梁桥结构性能分析与研究[D].上海:同济大学,2005.
[8]刘小旭.FRP-沥青混凝土钢桥面铺装结构静力特性研究[D].重庆:重庆交通大学,2010.
[9]黄明波.粘贴GFRP薄板的钢桥面铺装结构的力学行为[D].广州:广州华南理工大学,2012.
[10]王文前.装配式钢-RPC轻型组合桥面结构[D].长沙:湖南大学,2013.