### Abstract

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 language | German |
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Title of host publication | Proceedings of 5th fib Congress |

Number of pages | 9 |

Publication status | Published - 2018 |

### Keywords

### Cite this

*Proceedings of 5th fib Congress*

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

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research › peer-review

*Proceedings of 5th fib Congress.*

}

TY - GEN

T1 - SHEAR TESTS ON REINFORCED CONCRETE BEAMS WITH LOW AMOUNTS OF STIRRUPS

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.

KW - low shear reinforcement

KW - shear tests

M3 - Beitrag in einem Konferenzband

BT - Proceedings of 5th fib Congress

ER -