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论文类型：期刊论文

发表时间：2008-12-30

发表刊物：9th Asia-Pacific Symposium on Engineering Plasticity and Its Applications (AEPA 2008)

收录刊物：SCIE、CPCI-S、Scopus

卷号：22

期号：31-32

页面范围：5831-5837

ISSN号：0217-9792

关键字：FRP; RC beams; strengthening; effective strain; hypothetic test

摘要：During past decades, substantial studies on the external bonding of fiber reinforced polymer (FRP) strips to deficient reinforced concrete ( RC) beams have been carried out for the well-known superior properties of the FRP. Several shear prediction models have been established by using the effective strain of the FRP or introducing an ultimate stress discount coefficient. And the latest design concept is the use of stress distribution factor. In this paper, an equivalent effective strain model of the FRP is presented, which contains the concepts of maximum strain, stress distribution factor and critical shear crack angle influences. To develop a simple and accurate approach for such equivalent effective strain, major influenced factors are investigated and analyzed by the statistical independent hypothetic tests on a database of 128 RC beams wrapped by the FRP. Finally, a simple and rational shear design proposal is given, which is more accurate than the existing models using the above database.