BEHAVIOUR OF THE FRP-TO-STEEL BONDED JOINTS UNDER ELEVATED TEMPERATURE
The performance of the bonded interface is of critical importance to the behaviour of steel structures strengthened using externally bonded carbon fibre reinforced polymer(CFRP)plates.Numerous studies have been carried out to investigate the performance of the CFRP-to-steel bonded joints under mechanical loading.As many steel structures exposed to direct sunlight can reach temperatures as high as 60 oC-70oC,it is important to better understand the behaviour of CFRP-to-steel bonded joints under such elevated temperatures.However,little known so far on the performance of CFRP-to-steel bonded joints at elevated temperatures.This paper describes a series of carefully instrumented pull-off test on CFRP-to-steel bonded joints at elevated temperatures.Results from dynamic mechanical analysis tests on adhesive coupons are also presented.It is shown that the tensile elastic modulus,initial stiffness of the bond-slip curve,and peak bond shear stress deteriorates with increasing temperature.However,the total fracture energy increases before reaching the glass transition temperature(Tg)and then decreases once Tg is exceeded.As a result,the load-carrying capacity of CFRP-to-steel bonded joints increases for elevated temperatures below Tg and then decreases for temperatures above Tg.
FRP-to-steel pull-off test elevated temperature bond-slip relation fracture energy
Hao Zhou Jose Manuel Urgel Richard Emberley Cristian Maluk Dilum Fernando
School of Civil Engineering,The University of Queensland,Australia Institute for Research in Technology,ICAI School of Engineering,Universidad Pontificia Comillas,Spai Department of Mechanical Engineering,California Polytechnic State University,United States of Americ
国际会议
新加坡
英文
1-6
2017-07-19（万方平台首次上网日期，不代表论文的发表时间）