Experimental study on the bond-slip behavior between the shape steel and PVA fiber concrete

Qinglin Tao, Xuyun Chen, Weiping Pei, Xi Jia, Rencai Jin, Haikun Zhang, Zhengyi Kong, George Vasdravellis and Song Jin

Abstract

This study aims to investigate the bond-slip behaviour between shaped steel and polyvinyl alcohol (PVA) fibrereinforced concrete, a critical aspect affecting the structural performance of steel-concrete composite structures. The experiment on 14 specimens, considering various parameters such as concrete strength, cover thickness, anchorage length, PVA fibre volume, and the presence of shear studs were conducted. A novel experimental method was devised to analyse the bond-slip characteristics between shaped steel and PVA fibre concrete. All specimens exhibited failure due to the bond between shaped steel and concrete. The load-slip curve exhibited four distinct stages: the initial stage, slip stage, descending stage, and horizontal residual stage. Notably, the addition of PVA fibre significantly enhanced the load-bearing capacity, with optimal performance observed at a fibre volume of 8 kg/m3, surpassing conventional concrete bond strength. Moreover, increasing PVA concrete strength, anchorage length, and the use of shear studs were found to augment the bond strength. To further understand this bondslip behaviour, a constitutive model correlating bond strength with characteristic slip values was developed, and it aligns well with experimental results, validating its accuracy and applicability.

Key Words

bond-slip constitutive model; bond strength; push-out test; PVA fiber concrete; shape steel

Address

Qinglin Tao:Dept. of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan 243032, China Xuyun Chen:Dept. of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan 243032, China Weiping Pei:Dept. of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan 243032, China Xi Jia:Dept. of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China Rencai Jin:Technology Center, China MCC17 Group Co, LTD, Ma'anshan 243000, China Haikun Zhang:Dept. of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan 243032, China Zhengyi Kong:1)Dept. of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan 243032, China 2)Institute for Sustainable Built Environment, Heriot-Watt University, United Kingdom George Vasdravellis:Institute for Sustainable Built Environment, Heriot-Watt University, United Kingdom Song Jin:Dept. of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan 243032, China

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