NUMERICAL DETERMINATION OF THE INTERLAMINAR SHEAR MODULUS OF GFRP LAMINATES IN BRIDGE DECKS UNDER HYGROTHERMAL AGING EFFECTS
To investigate mechanical degradation on shear properties of Glass-fibre-reinforced polymer(GFRP)laminates in bridge decks under hygrothermal aging effects,short-beam shear tests were performed following the ASTM test standard(ASTM D790-10A).Based on the coupled hygro-mechanical Finite Element(FE)analysis method,an inverse parameter identification approach to short-beam shear tests was developed and then employed to determine the environment-dependent interlaminar shear modulus of GFRP laminates.The shear strength and modulus of dry(0%Mt/M∞),moisture unsaturated(30%Mt/M∞ and 50%Mt/M∞)and moisture saturated(100%Mt/M∞)specimens at the test temperatures of both 20℃ and 40℃ were compared.One cycle of moisture absorption-desorption process was also included in this study to investigate how the residual damage induced by the moisture diffusion degrades the shear properties of GFRP laminates.The results revealed that the shear strength and modulus of moisture saturated GFRP laminates decreased significantly,and the elevated testing temperature(40℃)aggravated moisture-induced mechanical degradation scale.Moreover,unrecoverable loss of shear properties for the GFRP laminates enduring one cycle of moisture absorption-desorption process was evident.
Fiber-reinforced polymer composite Composite bridge deck Hygrothermal aging effects Mechanical degradation Short-beam test Finite Element Method
Chengwei Luo Xu Jiang Jie Song Xuhong Qiang M.H.Kolstein F.S.K.Bijlaard
College of Civil Engineering,Tongji University,Siping Road 1239,Shanghai,China Shandong Provincial Academy of Building Research,250031 Jinan,China Department of Structural Engineering,Delft University of Technology,Stevinweg 1,2628CN,Delft,the Net
国际会议
新加坡
英文
1-5
2017-07-19（万方平台首次上网日期，不代表论文的发表时间）