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Title |
An Experimental Study on Allowable Compressive Stress at Prestress Transfer in Pre-Tensioned Concrete Members
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Authors |
이정연 ; 이득행 ; 김강수 ; 박민국 ; 윤상천 |
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Keywords |
프리스트레스 ; 프리텐션부재 ; 허용압축응력 ; 강도이론 ; 편심비 Allowable compressive stress ; Eccentricity ratio ; Prestress ; Pre-tensioned member ; Strength theory |
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Abstract |
In the previous research, allowable compressive stress was analyzed based on strength theory, in which primary effect factors on the allowable compressive stress, such as eccentricity ratio, section type, section size, prestress and self-weight moment, were considered. As its results, allowable compressive stress equations were proposed. As a series of the previous research, this paper presents an experimental study on the prestress at transfer of pre-tensioned members with different eccentricity ratios. The results shows that ACI318-08 and EC2-02 are unconservative for the members under low eccentricity ratios, and they are conservative for the members under high eccentricity ratios. Compared to the code provisions, the results indicates that the proposed equation reasonably well evaluates the allowable compressive stresses for those with different eccentricity ratios.
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