EXPERIMENTAL AND ANALYTICAL INVESTIGATION OF BEHAVIOR OF RC FLEXURAL MEMBERS STRENGTHENED BY COMPRESSING THE SHEAR CRITICAL REGION

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KHALOU A.R.; SHAMSAIE M.; AMINI A.R.

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Journal: Year:2000 | Volume:34 | Issue:2 (68) Page(s): 45-60

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Title

EXPERIMENTAL AND ANALYTICAL INVESTIGATION OF BEHAVIOR OF RC FLEXURAL MEMBERS STRENGTHENED BY COMPRESSING THE SHEAR CRITICAL REGION

Author(s)

KHALOU A.R. | SHAMSAIE M. | AMINI A.R. | Issue Writer Certificate

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Abstract

In this paper, the behavior of RC beams deficient in shear capacity and strengthened by using post-tensioning technique was investigated by conducting flexural tests on over twenty-four beams. The beams were 80x150 mm in cross section and 1800mm long. Test variables include: concrete strength (ƒc') ; shear span to effective depth ratio (aid); longitudinal tensile reinforcement (ρ); level of post - tensioning as a percentage of ƒc' ; presence of shear reinforcement; use of continuous plates, and presence of shear crack. Beam specimens were made with ƒc' of 35 and 50 MPa, shear span of L/4 and L/6, and reinforcement ratio based on seismic design. The level of post - tensioning in location of shear crack potential is 0.04 ƒc' and 0.07 ƒc'. Test results indicate that a post-compression stress as low as 0.04fc' in shear critical region increases shear strength significantly. It also changes failure mode from brittle shear to ductile bending. Moreover, influence of other parameters is very limited at this level of post-compression. Theoretical evaluation of behavior of beams strengthened in the critical region is based on Mohr's theory. The analysis shows that this method of strengthening is very effective, and is capable of providing ductile flexural behavior in beams with inadequate shear strength.

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APA: Copy

KHALOU, A.R., SHAMSAIE, M., & AMINI, A.R.. (2000). EXPERIMENTAL AND ANALYTICAL INVESTIGATION OF BEHAVIOR OF RC FLEXURAL MEMBERS STRENGTHENED BY COMPRESSING THE SHEAR CRITICAL REGION . JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TEHRAN), 34(2 (68)), 45-60. SID. https://sid.ir/paper/385939/en

Vancouver: Copy

KHALOU A.R., SHAMSAIE M., AMINI A.R.. EXPERIMENTAL AND ANALYTICAL INVESTIGATION OF BEHAVIOR OF RC FLEXURAL MEMBERS STRENGTHENED BY COMPRESSING THE SHEAR CRITICAL REGION . JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TEHRAN)[Internet]. 2000;34(2 (68)):45-60. Available from: https://sid.ir/paper/385939/en

IEEE: Copy

A.R. KHALOU, M. SHAMSAIE, and A.R. AMINI, “EXPERIMENTAL AND ANALYTICAL INVESTIGATION OF BEHAVIOR OF RC FLEXURAL MEMBERS STRENGTHENED BY COMPRESSING THE SHEAR CRITICAL REGION ,” JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TEHRAN), vol. 34, no. 2 (68), pp. 45–60, 2000, [Online]. Available: https://sid.ir/paper/385939/en

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