Role of reinforcement couplers in serviceability performance of concrete members

3rd International Conference on Innovative Materials, Structures and Technologies

Ng, P.L.^1,2 ; Guan, G.X.^2,3 ; Kwan, A.K.H.^2

Faculty of Civil Engineering, Vilnius Gediminas Technical University, Lithuania^1

Department of Civil Engineering, University of Hong Kong, China^2

GandK Consultancy Ltd, China^3

关键词: Concrete members;    Crack width;    Design codes;    Equivalent stiffness models;    Laboratory test;    Reinforcing bar;    Repeated loading;    Section analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/251/1/012103/pdf
DOI  :  10.1088/1757-899X/251/1/012103

来源: IOP

【 摘 要 】

Connection of reinforcing bars by couplers is a common form of reinforcement splicing. However, the variation of stiffness at the location of couplers and the potentially excessive residual slips are suspected to cause adverse impact on the serviceability, especially for structural members subjected to repeated loading. This paper studies the role of couplers in the serviceability performance of concrete members. Relevant provisions in design codes are reviewed and compared. Laboratory tests are conducted to investigate the slip behaviour of couplers. A section analysis approach based on equivalent stiffness model is proposed to account for the effects of couplers, and formulations of crack width calculation are explored for use in structural design.