Strength and Ductility of Embedded Steel Composite Coupling Beams

Lam, W. Y.; Su, R.K.L.; Pam, H. J.

doi:10.1260/136943303321625702

Cited by 28 publications

(17 citation statements)

References 5 publications

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“…Some of the experimental results on the medium-length coupling beams have been presented in previous publications [11][12][13][14][15][16]. The results demonstrated the improved performance of PRC coupling beams over that of conventional RC coupling beams under both elastic loading and inelastic imposed deformations.…”

Section: Experimental Investigation On the Performance Of Prc Couplinmentioning

confidence: 79%

“…By embedding a steel plate of thickness about one tenth of the beam width into an RC coupling beam with conventional reinforcement, the strength was almost doubled and the total energy dissipated almost tripled [16]. The importance of shear studs, especially in the wall anchorage regions of the plate, on the seismic performance of a PRC coupling beam has also been recognized [12,14].…”

Section: Experimental Investigation On the Performance Of Prc Couplinmentioning

confidence: 99%

“…Previous experimental results of medium-length PRC coupling beams (l/ h = 2.5) showed that the seismic performance of a PRC coupling beam would be seriously affected by the absence of shear studs on the embedded steel plate [12,14]. In order to investigate the contributions of shear studs in the beam span and the wall anchorage regions, two more medium-length PRC coupling beams were fabricated.…”

Section: Test Specimensmentioning

confidence: 99%

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Effects of shear connectors on plate-reinforced composite coupling beams of short and medium-length spans

Pam

Lam

2006

Journal of Constructional Steel Research

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Experimental studies on the newly proposed design of plate-reinforced composite (PRC) coupling beams have been carried out. Previous results have demonstrated the useful application of this design in coupling beams of medium span-to-depth ratios (l/ h) under both inelastic seismic and elastic wind loading. This paper presents further experimental studies on five PRC coupling beams, which investigated the importance of shear connectors on plate/reinforced concrete composite action. Three medium-length (l/ h = 2.5) and two short (l/ h = 1.17) PRC coupling beams, each containing a vertically embedded steel plate, were tested under reversed cyclic loading. While one short beam was welded with expanded metal meshes on the plate surfaces, others were welded with shear studs on the plates in the wall regions and/or the beam spans. Results showed that the expanded metal meshes did not work effectively, and while the shear studs in the beam span only slightly increased the beam capacity, those in the wall regions contributed considerably in improving inelastic beam performance.

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Section: Experimental Investigation On the Performance Of Prc Couplinmentioning

confidence: 79%

Section: Experimental Investigation On the Performance Of Prc Couplinmentioning

confidence: 99%

Section: Test Specimensmentioning

confidence: 99%

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Effects of shear connectors on plate-reinforced composite coupling beams of short and medium-length spans

Pam

Lam

2006

Journal of Constructional Steel Research

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“…However, the seismic behavior of concrete link beams is poor in most cases, as illustrated in Figure 19. Therefore, many researchers devoted to improving the seismic performance of concrete coupling beams (Paulay 1986;Lam et al 2003) or bringing forward other alternatives (Paulay el al. 1974;Harries et al 1992;Gong et al 2001).…”

Section: Figure 17 Failure Of Concrete Wall Under Earthquakesmentioning

confidence: 99%

Enhancing performance of buildings in seismic zone with structural metal dampers

Li¹,

Jin²,

Wang³

2015

Proceedings of the Second International Conference on Performance-Based and Life-Cycle Structural Engineering (PLSE 2015)

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The performance of buildings in seismic zone is usually more complicated than that in non-seismic zone. The buildings are not only required damage-limited for fully operational after frequent earthquakes, but collapseprevented under rare earthquakes for life safety. Therefore, the buildings in seismic zone require the structure to bear proper stiffness and load-bearing capacity to resist frequent earthquakes, and possess proper ductility and energy-dissipating capacity to prevent collapse due to rare earthquakes as well. Structural metal damper is herein defined as a combination of structural member and energy-dissipating damper. It not only provides stiffness and strength to guarantee the operation of buildings under frequent earthquakes, but also dissipates energy to reduce seismic response to a considerable extent for the purpose of collapse-prevention. Three different structural metal dampers, including buckling-restrained brace (BRB), buckling-restrained steel plate shear wall (BRSW) and steel link elements, are introduced in this paper. BRB is not only a structural brace, but innovatively kept from buckling by using restrainers and its hysteretic curve is improved to be spindle-shape, ideal for dissipating energy to against seismic effects. BRSW is also ideal spindle-shape in hysteretic curve feature and can be used as an excellent structural metal damper. And in order to improve the performance of traditional shear walls and coupled shear walls under earthquakes, steel link elements are introduced. Finally, examples of using various structural metal dampers for buildings in seismic zone are presented. KEYWORDSStructural metal damper, buckling-restrained brace, buckling-restrained steel plate shear wall, steel link beam, buckling-restrained steel link wall.

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“…Recently, Lam et al. [7][8] proposed to enhance the deformation and ductility capacities of RC coupling beams by utilizing the composite action between steel plate and RC. However, their suggestion of embedding a steel plate in a RC coupling beam could only be used in new constructions.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical studies of external steel plate strengthened reinforced concrete coupling beams

Zhu

2005

Engineering Structures

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This paper aims to develop a new method for strengthening reinforced concrete coupling beams. Experiments were conducted to test three full-scale RC coupling beams, of which two were strengthened by bolted external steel plates on the side faces of the beams and the other one acted as a control specimen without strengthening. The improvements to strength, deformation and energy dissipation of the external plate strengthened RC coupling beams were observed from the experimental results. Nonlinear finite element analysis was carried out to model the strengthened and non-strengthened coupling beams.The material properties used for concrete and reinforcement in the numerical analysis were validated by the laboratory tests. As experimental study showed that there was a small slip between the bolted connection and the concrete wall pier, a bilinear model was used to simulate the load-slip behaviour of the bolt connections. The model was calibrated by the experimental results from the plate strengthened coupling beams.Numerical parametric study found that the small slip (>3mm) between the bolt connection and the concrete wall could significantly affect the load carrying capacity of the bolt connections as well as the structural performance of the strengthened coupling beams. The numerical model developed is very useful for investigating strengthened beams with other configurations and other reinforcement details.

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Strength and Ductility of Embedded Steel Composite Coupling Beams

Cited by 28 publications

References 5 publications

Effects of shear connectors on plate-reinforced composite coupling beams of short and medium-length spans

Effects of shear connectors on plate-reinforced composite coupling beams of short and medium-length spans

Enhancing performance of buildings in seismic zone with structural metal dampers

Experimental and numerical studies of external steel plate strengthened reinforced concrete coupling beams

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