Shear capacity of hollow flange channel beams in simple connections

The paper discusses the results of an experimental investigation carried out on reinforced concrete (RC) beams strengthened in shear by externally bonded fiber reinforced plastic (FRP) sheets. The study is devoted to analyze the role that the transverse steel reinforcement and the beam slenderness ratio could play on the resistant mechanism of RC beams strengthened in shear by FRP composites. The results are summarized and analyzed in detail in the paper in terms of shear capacity, cracking pattern and shear resisting contribution of FRP.

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Contribution of Shear Reinforcements and Concrete to the Shear Capacity of Interfaces between Concretes Cast at Different Times

KSCE Journal of Civil Engineering ◽

10.1007/s12205-021-0791-5 ◽

2021 ◽

Author(s):

Jie Liu ◽

Yangmin Bu ◽

Juanjuan Chen ◽

Qing Wang

Keyword(s):

Shear Capacity ◽

Shear Reinforcements

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Shear Capacity of Reinforced Concrete Beams under Monotonic and Cyclic Loads: Experiments and Computational Models

Materials ◽

10.3390/ma14154092 ◽

2021 ◽

Vol 14 (15) ◽

pp. 4092

Author(s):

Kamil Bacharz ◽

Barbara Goszczyńska

Keyword(s):

Reinforced Concrete ◽

Laboratory Tests ◽

Computational Models ◽

Concrete Beams ◽

Shear Capacity ◽

Reinforced Concrete Beams ◽

Image Correlation ◽

Engineering Practice ◽

Cyclic Loads ◽

Loading Modes

The paper reports the results of a comparative analysis of the experimental shear capacity obtained from the tests of reinforced concrete beams with various static schemes, loading modes and programs, and the shear capacity calculated using selected models. Single-span and two-span reinforced concrete beams under monotonic and cyclic loads were considered in the analysis. The computational models were selected based on their application to engineering practice, i.e., the approaches implemented in the European and US provisions. Due to the changing strength characteristics of concrete, the analysis was also focused on concrete contribution in the shear capacity of reinforced concrete beams in the cracked phase and on the angle of inclination of diagonal struts. During the laboratory tests, a modern ARAMIS digital image correlation (DIC) system was used for tracking the formation and development of diagonal cracks.

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Shear response of steel fiber reinforced recycled concrete-filled steel tube columns

Advances in Structural Engineering ◽

10.1177/13694332211009322 ◽

2021 ◽

pp. 136943322110093

Author(s):

Zhenzhen Liu ◽

Yiyan Lu ◽

Shan Li ◽

Jiancong Liao

Keyword(s):

Axial Compression ◽

Steel Fiber ◽

Steel Tube ◽

Shear Capacity ◽

Recycled Concrete ◽

Recycled Aggregate ◽

Superposition Method ◽

Fiber Reinforced ◽

Concrete Filled Steel Tube ◽

Shear Span

A comprehensive study of the shear characteristics of steel fiber reinforced recycled concrete-filled steel tube (SRCFST) columns is conducted. 50 CFST stub columns are tested with the variables of steel tube diameter-thickness ratio ( D/t), shear span-to-depth ratio (λ), axial compression ratio ( n), and concrete mix. Two types of cements, three recycled aggregate percentages, three water-cement ratios, and three steel fiber contents are considered in design of concrete mixes. The experimental results show that SRCFST columns present the coincident shear behavior of the ordinary CFST columns. As λ is increased, shear resistance shows a downtrend, while the flexural strength presents an increasing trend. Imposing axial compression or thickening steel tube contributes to an adequate safety margin in plastic period. Based on the contributions superposition method, a predicted model of the shear capacity of SRCFST columns is proposed in consideration of shear-span ratio, axial compression, and self-stress.

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Shear capacity of precast half-joint beams with steel fibre reinforced self-compacting concrete

Construction and Building Materials ◽

10.1016/j.conbuildmat.2020.121813 ◽

2021 ◽

Vol 272 ◽

pp. 121813

Author(s):

N.F. Zamri ◽

R.N. Mohamed ◽

K.S. Elliott

Keyword(s):

Steel Fibre ◽

Shear Capacity ◽

Self Compacting Concrete

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Research on Shear Bearing Capacity of Reinforced Concrete Short Beam in Salt-Fog Environment

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.455-456.1079 ◽

2012 ◽

Vol 455-456 ◽

pp. 1079-1083

Author(s):

Wei Jun Yang ◽

Hong Jia Huang ◽

Wen Yu Jiang ◽

Yi Bin Peng

Keyword(s):

Reinforced Concrete ◽

Bearing Capacity ◽

Salt Spray ◽

Test Chamber ◽

Shear Capacity ◽

Salt Spray Test ◽

Concrete Members ◽

Short Beam ◽

Shear Bearing Capacity ◽

Salt Fog

Shantou atmospheric salt-fog environment is simulated with the comprehensive salt spray test chamber. By using reinforced concrete short beams under different water-cement radio, different corrosion time, the inclined section degradation rules of the corrosive reinforced concrete members are researched for establishing shear capacity of short beam formulas in salt-fog environment.

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Influence of Patching on the Shear Failure of Reinforced Concrete Beam without Stirrup

Infrastructures ◽

10.3390/infrastructures6070097 ◽

2021 ◽

Vol 6 (7) ◽

pp. 97

Author(s):

Stefanus Adi Kristiawan ◽

Halwan Alfisa Saifullah ◽

Agus Supriyadi

Keyword(s):

Reinforced Concrete ◽

Shear Failure ◽

Numerical Study ◽

Unsaturated Polyester ◽

Reinforced Concrete Beam ◽

Concrete Cover ◽

Shear Capacity ◽

Rc Beam ◽

Shear Span ◽

Shear Cracking

Deteriorated concrete cover, e.g., spalling or delamination, especially when it occurs at the web of a reinforced concrete (RC) beam within the shear span, can reduce the shear capacity of the beam. Patching of this deteriorated area may be the best option to recover the shear capacity of the beam affected. For this purpose, unsaturated polyester resin mortar (UPR mortar) has been formulated. This research aims to investigate the efficacy of UPR mortar in limiting the shear cracking and so restoring the shear capacity of the deteriorated RC beam. The investigation is carried out by an experimental and numerical study. Two types of beams with a size of 150 × 250 × 1000 mm were prepared. The first type of beams was assigned as a normal beam. The other was a beam with a cut off in the non-stirrup shear span, which was eventually patched with UPR mortar. Two reinforcement ratios were assigned for each type of beams. The results show that UPR mortar is effective to hamper the propagation of diagonal cracks leading to increase the shear failure load by 15–20% compared to the reference (normal) beam. The increase of shear strength with the use of UPR mortar is consistently confirmed at various reinforcement ratios.

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