NUMERICAL STUDY OF FRP BONDED STEEL BEAMS WITH DIFFERENT STRENGTHENING PARAMETERS
The use of advanced composite materials to upgrade and retrofit existing infrastructures is increasing rapidly. One specific area in which the technique has recently been introduced is the strengthening and rehabilitation of steel flexural members with bonded fiber reinforced polymer (FRP) laminates. In this paper, the flexural behavior of FRP adhesively bonded steel beams is numerically studied by conducting finite element analysis (FEA). Experiments on two specimens under four-point bending are conducted first. Then the accuracy of the numerical model is verified by comparison between numerical and experimental results. Finally, finite element models with different strengthening parameters are developed to examine the effects of various strengthening parameters on the flexural capacity of FRP bonded steel beams. The strengthening parameters investigated include FRP thickness, tensile modulus of FRP laminate and bond length. It is found that the flexural stiffness of the steel beam increases almost linearly with the increasing thickness or tensile modulus of the FRP laminate. The increase of ultimate strength is less noticeable when the FRP thickness or tensile modulus is higher. If the other parameters keep unchanged, there will be an optimal value of thickness or tensile modulus of FRP, which can make the steel beam get same increases of flexural stiffness and strength. When the bond length reaches a certain value, further increase of the bond length is almost meaningless if the flexural capacity of the strengthened beam is concerned.
Steel beam fiber reinforced polymer numerical parametric finite element
S P Chiew Y Yu
Nanyang Technological University, Singapore
国际会议
The 9th International Conference on Steel Space & Composite Structures(第九届国际钢材、空间结构、组合结构会议)
烟台·北京
英文
323-328
2007-10-10（万方平台首次上网日期，不代表论文的发表时间）