SHEAR TESTS ON REINFORCED CONCRETE BEAMS WITH LOW AMOUNTS OF STIRRUPS

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Abstract

This paper presents an experimental study on the shear resistance of reinforced concrete beams with low amounts of shear reinforcement. The experimental program consists of four simply supported beams subjected to concentrated loads, one simply supported beam and four cantilevers subjected to uniformly distributed loads. For the shear reinforcement, closed stirrups with the
reinforcement ratio in the range of 0.6-1.1 times of the required minimum shear reinforcement ratio (ρ w,min ) according to EC2 (2010) were used. The test results showed considerable effects of the support and loading conditions on the crack development and shear resistance of beams with low
amounts of stirrups. It was found that shear reinforcement lower than the required minimum reinforcement did not contribute to the shear resistance of the simply supported beams subjected to concentrated loads. In contrast, a very low amount of stirrups, which corresponds to approx. 0.6ρ w,min , could effectively improve the shear resistance of the specimens subjected to uniformly
distributed loads. The effects of the static system and shear reinforcement were further investigated by analyzing the failure mode and location. Comparison to the shear resistances predicted by formulas included in some codes of practice is also provided.
Original languageGerman
Title of host publicationProceedings of 5th fib Congress
Number of pages9
Publication statusPublished - 2018

Keywords

    Cite this

    SHEAR TESTS ON REINFORCED CONCRETE BEAMS WITH LOW AMOUNTS OF STIRRUPS. / Betschoga, Christoph Thomas; Nguyen, Viet Tue; Nguyen, Duc Tung; Nguyen, Duc Tung.

    Proceedings of 5th fib Congress. 2018.

    Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

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    title = "SHEAR TESTS ON REINFORCED CONCRETE BEAMS WITH LOW AMOUNTS OF STIRRUPS",
    abstract = "This paper presents an experimental study on the shear resistance of reinforced concrete beams with low amounts of shear reinforcement. The experimental program consists of four simply supported beams subjected to concentrated loads, one simply supported beam and four cantilevers subjected to uniformly distributed loads. For the shear reinforcement, closed stirrups with thereinforcement ratio in the range of 0.6-1.1 times of the required minimum shear reinforcement ratio (ρ w,min ) according to EC2 (2010) were used. The test results showed considerable effects of the support and loading conditions on the crack development and shear resistance of beams with lowamounts of stirrups. It was found that shear reinforcement lower than the required minimum reinforcement did not contribute to the shear resistance of the simply supported beams subjected to concentrated loads. In contrast, a very low amount of stirrups, which corresponds to approx. 0.6ρ w,min , could effectively improve the shear resistance of the specimens subjected to uniformlydistributed loads. The effects of the static system and shear reinforcement were further investigated by analyzing the failure mode and location. Comparison to the shear resistances predicted by formulas included in some codes of practice is also provided.",
    keywords = "low shear reinforcement, shear tests",
    author = "Betschoga, {Christoph Thomas} and Nguyen, {Viet Tue} and Nguyen, {Duc Tung} and Nguyen, {Duc Tung}",
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    AU - Betschoga, Christoph Thomas

    AU - Nguyen, Viet Tue

    AU - Nguyen, Duc Tung

    AU - Nguyen, Duc Tung

    PY - 2018

    Y1 - 2018

    N2 - This paper presents an experimental study on the shear resistance of reinforced concrete beams with low amounts of shear reinforcement. The experimental program consists of four simply supported beams subjected to concentrated loads, one simply supported beam and four cantilevers subjected to uniformly distributed loads. For the shear reinforcement, closed stirrups with thereinforcement ratio in the range of 0.6-1.1 times of the required minimum shear reinforcement ratio (ρ w,min ) according to EC2 (2010) were used. The test results showed considerable effects of the support and loading conditions on the crack development and shear resistance of beams with lowamounts of stirrups. It was found that shear reinforcement lower than the required minimum reinforcement did not contribute to the shear resistance of the simply supported beams subjected to concentrated loads. In contrast, a very low amount of stirrups, which corresponds to approx. 0.6ρ w,min , could effectively improve the shear resistance of the specimens subjected to uniformlydistributed loads. The effects of the static system and shear reinforcement were further investigated by analyzing the failure mode and location. Comparison to the shear resistances predicted by formulas included in some codes of practice is also provided.

    AB - This paper presents an experimental study on the shear resistance of reinforced concrete beams with low amounts of shear reinforcement. The experimental program consists of four simply supported beams subjected to concentrated loads, one simply supported beam and four cantilevers subjected to uniformly distributed loads. For the shear reinforcement, closed stirrups with thereinforcement ratio in the range of 0.6-1.1 times of the required minimum shear reinforcement ratio (ρ w,min ) according to EC2 (2010) were used. The test results showed considerable effects of the support and loading conditions on the crack development and shear resistance of beams with lowamounts of stirrups. It was found that shear reinforcement lower than the required minimum reinforcement did not contribute to the shear resistance of the simply supported beams subjected to concentrated loads. In contrast, a very low amount of stirrups, which corresponds to approx. 0.6ρ w,min , could effectively improve the shear resistance of the specimens subjected to uniformlydistributed loads. The effects of the static system and shear reinforcement were further investigated by analyzing the failure mode and location. Comparison to the shear resistances predicted by formulas included in some codes of practice is also provided.

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    KW - shear tests

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