FRP-RC梁柱蠕变和长期挠曲的设计意义

SP-264: Serviceability of Concrete Members Reinforced with Internal/External FRP Reinforcement Pub Date : 2009-10-01 DOI:10.14359/51663266

A. Mirmiran, H. Erdoğan, A. Singhvi

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引用次数: 0

摘要

本文将讨论大多数研究都集中在纤维增强聚合物(FRP)增强混凝土(RC)构件的短期行为上，但如果FRP要用作基础设施的可行替代加固，研究其时间依赖性行为是重要和必要的。本研究提供了一种分析工具来评估FRP-RC梁柱在持续载荷下的可用性问题。分析模型考虑了FRP-RC梁和梁柱的蠕变。该模型基于混凝土的龄期调整有效模量法和FRP筋的Findlay模型。该模型已通过作者和文献中的FRP-RC梁试验进行了验证。然后进行了详细的参数研究，以确定不同类型的FRP筋对FRP-RC细长柱蠕变的影响，以及ACI 318关于细长RC柱蠕变的设计规定是否足以安全用于FRP-RC结构。

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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Design Implications of Creep and Long-Term Deflections in FRP-RC Beam-Columns

This paper will discuss that most studies have focused on short term behavior of fiber reinforced polymer (FRP)-reinforced concrete (RC) members, but it is important and necessary to study their time-dependent behavior, if FRP is to be used as a viable alternative reinforcement for the infrastructure. The present study provides an analytical tool to assess serviceability issues of FRP-RC beam-columns under sustained loads. The analytical model accounts for creep of FRP-RC beams and beam-columns. The model is based on age-adjusted effective modulus method for concrete and Findlay’s model for FRP reinforcement. The model has been verified against the FRP-RC beam tests by the authors, as well as those from the literature. A detailed parametric study is then carried out to determine the effects of different types of FRP reinforcing bars on the creep of slender FRP-RC columns, and whether the ACI 318 design provisions for creep of slender RC columns is adequately safe for FRP-RC construction.

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SP-264: Serviceability of Concrete Members Reinforced with Internal/External FRP Reinforcement

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