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Advances in Materials Science and Engineering
Volume 2017, Article ID 8280317, 11 pages
Research Article

Shear Strength Reduction Factor of Prestressed Hollow-Core Slab Units Based on the Reliability Approach

1Department of Architectural Engineering, University of Seoul, 163 Seoulsiripdae-ro, Dongdaemun-gu, Seoul 02504, Republic of Korea
2Department of Medical Space Design & Management, Konyang University, 158 Gwanjeodong-ro, Seo-gu, Daejeon 35365, Republic of Korea

Correspondence should be addressed to Kang Su Kim;

Received 10 February 2017; Revised 9 May 2017; Accepted 13 June 2017; Published 17 July 2017

Academic Editor: Paulo M. S. T. De Castro

Copyright © 2017 Hae-Chang Cho et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This study investigated the shear design equations for prestressed hollow-core (PHC) slabs and examined the suitability of strength reduction factors based on the structural reliability theory. The reliability indexes were calculated for the shear strength equations of PHC slabs specified in several national design codes and those proposed in previous studies. In addition, the appropriate strength reduction factors for the shear strength equations to ensure the target reliability index were calculated. The results of the reliability index analysis on the ACI318-08 equation showed that the shear strengths of the members with the heights of more than 315 mm were evaluated to be excessively safe, whereas some members with low depths did not satisfy the target reliability index.