Long Term Deflections Of Continuous Reinforced Concrete Beams

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ISBN 13 :
Total Pages : 9 pages
Book Rating : 4.:/5 (614 download)

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Download or read book Long- Term Deflection of Concrete Members Reinforced with Glass Fibre Reinforced Polymer Bars written by and published by . This book was released on 2000 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents the results of an exceptional experimental investigation of the lon-term deflection behabviour of the concrete beams reinforced with glass fibre reinforced polymer (GFRP) bars. The long-term defelections of the GFRP reinforced beams are compared to deflections of the identical beams reinforced with steel bars. All beams were under sustained loading for approximately 8 months. The variables were the level of sustained loading and the reinforement materials: steel or GFRP. The experimental immediate and long- term defelections using CEB-FIP Model Code 1990, and the ACI-318-95code using the recommendations of the ACI Committe 209; these references for steel reinforced concrete members. The test result indicate that under similar loading conditions and the same reinforcement ratio, the GRFP-reinforced beams had long term defecltions, due to creep and shrinkage, 1.7 times greater than those of the steel-reinforcedb eams. A comparison of the theoretical and experimental immediate and long term deflections indicates that the CEB-FIP Model Code 1990 gives reasonable predictions for all beams, and that the ACI 318-95 code, using the ACI Committee 209 recommendations, overestimates the defelctions due to the combined effects of creep and shrinkage.