FRP筋混凝土梁抗剪强度设计方法

SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures Pub Date : 2005-10-01 DOI:10.14359/14875

A. El-Sayed, E. El-Salakawy, B. Benmokrane

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引用次数: 24

摘要

概要:ACI 440委员会提出了一种设计方法，用于评估混凝土对FRP增强混凝土梁抗剪能力的贡献，该方法考虑FRP纵向加固的轴向刚度。近期对不同FRP筋类型和配比纵向加固梁的抗剪试验表明，现行的ACI 440.1R-03抗剪设计方法显著低估了此类梁的混凝土抗剪强度。本文对ACI 440.1R-03剪切设计方程进行了修正。通过对98个试验试件的抗剪强度进行验证，计算值具有较好的可比性。此外，利用现有的试验结果，将提出的方程与主要设计规定进行了比较。使用所提出的方程获得了更好的和一致的预测。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Shear Strength of Concrete Beams Reinforced with FRP Bars: Design Method

Synopsis: ACI Committee 440 has proposed a design approach for evaluating the concrete contribution to the shear resistance of FRP-reinforced concrete beams that accounts for the axial stiffness of FRP longitudinal reinforcement. Recent shear tests conducted on beams longitudinally reinforced with different types and ratios of FRP bars indicate that the current ACI 440.1R-03 shear design approach significantly underestimates the concrete shear strength of such beams. This paper presents a proposed modification to the ACI 440.1R-03 shear design equation. The proposed equation was verified against experimental shear strengths of 98 specimens tested to date, and the calculated values are shown to compare well. In addition, the proposed equation was compared to the major design provisions using the available test results. Better and consistent predictions were obtained using the proposed equation.

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SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures

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