Punching Shearing of High-Strength Concrete Slabs With Openings

• Main Authors: Shiann-Tzong Wu, 吳憲綜
• Other Authors: Ing-Jaung Lin
• Format: Others
• Language: zh-TW
• Published: 1995
• Online Access: http://ndltd.ncl.edu.tw/handle/12757824895595032251

碩士 === 國立臺灣科技大學 === 營建工程技術學系 === 83 === Currently, the punching shear strengths of reinforced concrete slabs with openings are calculated using the provisions of Section 11.12.5 of ACI Building Code. However, the provisions of Section 11.12.5 of ACI 318-89 are based on test results of low-strength concrete slabs with openings. In recent years, there is a trend to use high-strentgh concrete in construction, therefore it becomes necessary to examine the applicability of current ACI Code when applied to reinforced high-strength concrete slabs with openings. In this study, thirty specimens were tested . Variables included in this study are the concrete strength , the type of opening and the flexural reinforcement ratio. The test results of this study and results presented in previous studies indicate that for both low-strength and high- strength concrete slabs with openings, the punching shear strengths calculated using the provision of ACI 318-89 are overly conservative. Base on test results, the design equations proposed by previous researchers are also carefully examined in this study.