Diagonally Reinforced Concrete Coupling Beams: Effects of Axial Restraint

The purpose of this study is to investigate the feasibility of using hooked-end steel fibers as additional transverse reinforcements such as cross ties and leg bars for diagonally reinforced concrete (DRC) coupling beams aligned vertically over coupled special structural walls. Three 1/3-scale short beams were made and tested under cyclic shear in a double curvature condition. All specimens have the same reinforcement configuration except for transverse reinforcing details and the clear span length-to-section depth ratio (lnh) of 2.0. Reinforced concrete (RC) coupling beam (RC-CB) was designed with full confinement of diagonally reinforced concrete beam section based on the seismic design provisions of the ACI 318-14 Code. To improve the constructability without sacrificing strength and ductility, the fiber contents in the FRC0.75-CB and FRC1.50-CB specimens replacing additional transverse bars with steel fibers were 0.75% and 1.50% at volume fraction, respectively. Test results revealed that additional transverse reinforcement in the diagonally reinforced coupling beams have a significant effect on the cracking and structural behaviors. For diagonally reinforced coupling beams with only hoops and without crossties and legs of hoop, the addition of steel fiber at volume fraction of more than 0.75% to concrete provides equal cracking and structural behaviors as compared to those of diagonally reinforced coupling beam with full confinement details.

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Analysis on the Ductility Performance of Reinforced Concrete Coupling Beams in Shear Wall Structure

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.788.538 ◽

2013 ◽

Vol 788 ◽

pp. 538-541

Author(s):

Peng Zhang ◽

Fu Ma

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Reinforced Concrete ◽

Concrete Strength ◽

Shear Wall ◽

Wall Structure ◽

Coupling Beam ◽

Coupling Beams ◽

Element Analysis ◽

Reinforcement Scheme

Coupling beam, the first line resisting earthquake, is directly related to the overall performance of the shear wall structure. Using the large general finite element analysis software ANSYS, the coupling beam span-depth ratio is 2~3 different reinforcement scheme in finite element analysis. Analysis on the ductility performance of reinforced concrete coupling beams in shear wall structure in three fields: the concrete strength grade, the longitudinal reinforcement ratio and the stirrup ratio, provides a basis for the design of the structure and to provide a reference for similar studies.

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The Research of the Relative Rigid Effect in the Numerical Simulation of the Steel Plate Reinforced Concrete Coupling Beams

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.638-640.283 ◽

2014 ◽

Vol 638-640 ◽

pp. 283-286

Author(s):

Li Song ◽

Dong Chen ◽

Bao Lei Li

Keyword(s):

Numerical Simulation ◽

Reinforced Concrete ◽

Steel Plate ◽

Simulation Analysis ◽

Great Influence ◽

Shear Walls ◽

Internal Force ◽

Coupling Beams ◽

Loading Mode ◽

Deformation Properties

The coupling beam work as an important component in coupled shear walls, the strength,stiffness and deformation properties of which have great influence on the seismic performance of shear walls, the steel plate reinforced concrete coupling beams have the advantages as follows: simplify the constructional details, make the construction convenient and reliable performance [1][2]. The numerical simulation model in this paper is a coupled shear wall connected by steel plate reinforced concrete coupling beams in reference [3], and the loading mode is the same as the reference [4] . The relative stiffness effect was explored by study the internal force and displacement of the model with changing the stiffness of the coupling beams and the shear walls while the span-depth ratio is stable .The study will provide a reference for the numerical simulation of the finite element simulation analysis of the coupling beams and the steel reinforced concrete structures.

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