A unified design approach for plate-reinforced composite coupling beams

Su, R.K.L.; Lam, W. Y.

doi:10.1016/j.jcsr.2008.07.030

Cited by 13 publications

(7 citation statements)

References 11 publications

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“…It is found that such ratios ranged from 0.4 to 1.2. A similar study by Su and Lam (2009) for internal steel plate strengthened coupling beams reveals that this ratio is a function of various parameters, including the plate thickness to beam width ratio, longitudinal steel ratio and span-to-depth ratio of the beam. Paulay (1971) considered the effects of truss and arch actions in RC coupling beams and proposed the following equation to estimate the beam elongation.…”

Section: Estimation Of Axial Forcementioning

confidence: 65%

Use of bolted steel plates for strengthening of reinforced concrete beams and columns

Cheng

Wang

et al. 2011

The IES Journal Part A: Civil & Structural Engineering

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Reinforced concrete structures often need strengthening due to defective construction, having higher loads than those foreseen in the initial design of the structure, or as a result of material deterioration or accidental damage. The need for strengthening concrete structures has become a crucial problem not only in developed countries but also in China and other developing countries. The use of bolted steel plates to retrofit existing RC structural components has been proven experimentally and practically to be effective in solving the problem. In this paper, experimental and numerical studies conducted at The University of Hong Kong on the strengthening of reinforced concrete coupling beams, floor beams and columns using bolted external steel plates are summarized. Features and design principles of this strengthening method are discussed.

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Section: Estimation Of Axial Forcementioning

confidence: 65%

Use of bolted steel plates for strengthening of reinforced concrete beams and columns

Cheng

Wang

et al. 2011

The IES Journal Part A: Civil & Structural Engineering

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“…In practice, it is more desirable for the plate to share about 50% of the total load resistance. The results in the present study have enhanced the development of a comprehensive design procedure for the PRC coupling beams [ 18 ]. …”

Section: Discussionmentioning

confidence: 83%

Behaviour of Plate Anchorage in Plate‐Reinforced Composite Coupling Beams

Lam

et al. 2013

The Scientific World Journal

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As a new alternative design, plate-reinforced composite (PRC) coupling beam achieves enhanced strength and ductility by embedding a vertical steel plate into a conventionally reinforced concrete (RC) coupling beam. Based on a nonlinear finite element model developed in the authors' previous study, a parametric study presented in this paper has been carried out to investigate the influence of several key parameters on the overall performance of PRC coupling beams. The effects of steel plate geometry, span-to-depth ratio of beams, and steel reinforcement ratios at beam spans and in wall regions are quantified. It is found that the anchorage length of the steel plate is primarily controlled by the span-to-depth ratio of the beam. Based on the numerical results, a design curve is proposed for determining the anchorage length of the steel plate. The load-carrying capacity of short PRC coupling beams with high steel ratio is found to be controlled by the steel ratio of wall piers. The maximum shear stress of PRC coupling beams should be limited to 15 MPa.

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“…where f c is the nominal compressive strength of the concrete, b c is the beam section width, h 0 is the beam section effective depth, A st is the area of transverse reinforcement, f yt is the nominal yield strength of transverse reinforcement, s is the spacing of transverse reinforcement, R y is the ratio of the expected to nominal yield strength of structural steel, f a is the nominal yield strength of structural steel, t w is the web thickness of encased steel, H s is the cross-sectional height of encased steel, and t f is the flange thickness of encased steel. Su and Lam [6] tested eight half-scale steel plate-reinforced concrete coupling beams of short and medium-length spans and proposed a unified design approach. Motter et al [3] tested four one-half scale flexure-yielding SRC coupling beams embedded into reinforced concrete structural walls for realistic loading conditions and found that with adequate encased steel embedment and wall reinforcement, the performance of flexure-yielding SRC coupling beams can meet or exceed that of conventionally or diagonally reinforced concrete coupling beams.…”

Section: Introductionmentioning

confidence: 99%

“…Although a number of SRC coupling beams have been tested [4][5][6][7][8], those results generally showed that SRC coupling beams can provide good seismic behavior; stirrups, longitudinal rebars, and embedment of encased steel have a significant impact on the failure modes of SRC coupling beams. However, those researches paid little attention to SRC coupling beam damage development during the whole loading process, which is an important reference in assessing the seismic performance of structures or structural components [9,10].…”

Section: Introductionmentioning

confidence: 99%

“…However, those researches paid little attention to SRC coupling beam damage development during the whole loading process, which is an important reference in assessing the seismic performance of structures or structural components [9,10]. In addition, there are two main types of encased steel used in composite coupling beams, which are H-shaped steel [3-5, 7, 8] and steel plate without flange [6]. However, the comparison research between these two types of encased steel on seismic performance of coupling beams is limited.…”

Section: Introductionmentioning

confidence: 99%

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Damage Deformation of Flexure‐Yielding Steel‐Reinforced Concrete Coupling Beams: Experimental and Numerical Investigation

Jiang

Yang

2019

Advances in Civil Engineering

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SRC coupling beams offer many significant advantages, including the reduction in section depth, reduced congestion at the wall boundary region, improved degree of coupling for a given beam depth, and improved deformation capacity. In this paper, 7 half-scale flexure-yielding SRC coupling beams designed according to Chinese approach have been tested under cyclic loads. Detailed parameters such as aspect ratios, steel reinforcement ratios, and steel flange-web ratios were systematically studied, and the damage behavior of SRC coupling beams were presented in this paper. The test results show that the aspect ratio, steel ratio, and steel flange-web ratio have great influence on the damage behavior of SRC coupling beams. Three-dimensional nonlinear finite element models were constructed and benchmarked through comparison with test results for both global and local damage deformation behavior. Based on the material damage and strength degradation, four performance levels were defined and corresponding chord rotation limits were obtained through the verified numerical analysis.

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A unified design approach for plate-reinforced composite coupling beams

Cited by 13 publications

References 11 publications

Use of bolted steel plates for strengthening of reinforced concrete beams and columns

Use of bolted steel plates for strengthening of reinforced concrete beams and columns

Behaviour of Plate Anchorage in Plate‐Reinforced Composite Coupling Beams

Damage Deformation of Flexure‐Yielding Steel‐Reinforced Concrete Coupling Beams: Experimental and Numerical Investigation

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