2012 Volume 68 Issue 2 Pages I_703-I_714
In steel members strengthening with CFRP plate, thermal stress is introduced in steel members by temperature change, due to difference in coefficients of thermal expansion between steel and CFRP. In the previous study, reduction technique of thermal stress in steel members, which is additional bonding of aluminum alloy plates with CFRP plates, was proposed. However, by bonding laminated plate consisting of CFRP and aluminum plates on one side of thin steel plate, thermal stress is not completely reduced. Therefore, to confirm the effect of proposed method for one side bonding, heat tests of steel plates or steel member with bonding laminated plate on one side were carried out in this research. Additionally, to verify the test results, numerical analysis of proposed method was also carried out. As a result, it is found that the three-layered laminated plate consisting of one CFRP plate and two aluminum plates was required for reduction of thermal stress in thin steel plate. However, two-layered laminated plate could fully reduce the thermal stress in steel girders.
