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논문 기본 정보

자료유형
학술저널
저자정보
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)
저널정보
테크노프레스 Structural engineering and mechanics : An international journal Structural engineering and mechanics : An international journal 제40권 제6호
발행연도
2011.1
수록면
847 - 866 (20page)

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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.

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