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http://dx.doi.org/10.12989/sem.2011.40.6.847

Influence of high-cycle fatigue on the tension stiffening behavior of flexural reinforced lightweight aggregate concrete beams  

Chen, How-Ji (Department of Civil Engineering, National Chung-Hsing University)
Liu, Te-Hung (Department of Civil Engineering, National Chung-Hsing University)
Tang, Chao-Wei (Department of Civil Engineering & Engineering Informatics, Cheng-Shiu University)
Tsai, Wen-Po (Department of Civil Engineering, National Chung-Hsing University)
Publication Information
Structural Engineering and Mechanics / v.40, no.6, 2011 , pp. 847-866 More about this Journal
Abstract
The objective of this study was to experimentally investigate the bond-related tension stiffening behavior of flexural reinforced concrete (RC) beams made with lightweight aggregate concrete (LWAC) under various high-cycle fatigue loading conditions. Based on strain measurements of tensile steel in the RC beams, fatigue-induced degradation of tension stiffening effects was evaluated and was, compared to reinforced normal weight concrete (NWC) beams with equal concrete compressive strengths (40 MPa). According to applied load-mean steel strain relationships, the mean steel strain that developed under loading cycles was divided into elastic and plastic strain components. The experimental results showed that, in the high-cycle fatigue regime, the tension stiffening behavior of LWAC beams was different from that of NWC beams; LWAC beams had a lesser reduction in tension stiffening due to a better bond between steel and concrete. This was reflected in the stability of the elastic mean steel strains and in the higher degree of local plasticity that developed at the primary flexural cracks.
Keywords
lightweight aggregate concrete; reinforced concrete beam; high-cycle fatigue; tension stiffening; bond-slip;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By Web Of Science : 0  (Related Records In Web of Science)
Times Cited By SCOPUS : 0
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