Abstract

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Title:: Research on Dynamic Bond Behavior of CFRP Sheet-steel Interface Based on Beam Test Method

Author(s):: YANG Jin; HUO Jing-si; XIAO Yan; Key Laboratory of Building Safety and Energy Efficiency of China Ministry of Education, Hunan University

Keywords:: CFRP; beam test method; interface; bond behavior; impact load; static load

Abstract:: According to the problem that carbon fiber reinforced polymers (CFRP) prematurely debond from the strengthened structure members, four specimens bonded with CFRP sheet under impact load and two specimens under static load were tested. The dynamic bond behavior of CFRP sheet-steel interface was mainly investigated. The failure modes, the strain distribution of CFRP as well as loadslip curves under impact load were compared with those of static load to study dynamic interfacial bond behavior. Based on the tests, calculation method of bond-slip constitutive relations based on beam test method was proposed. The results show that the strain distribution gradient of CFRP sheet under impact load is sharper than those under static load, and interfacial ultimate bond strength is increased.