Experimental study of a replaceable steel coupling beam with an end-plate connection

Farsi, A.; Keshavarzi, Farhad; Pouladi, Pouya; Mirghaderi, Rasoul

doi:10.1016/j.jcsr.2016.03.018

Cited by 42 publications

(5 citation statements)

References 15 publications

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“…The shear force and bending moment distribution in a coupling beam, with the inflection point located at the beam mid-span, was replicated using the half-beam cantilever subassembly. Gong and Shahrooz (2001) and Farsi et al (2016) have used similar subassembly test setups in the past.…”

Section: Test Specimen Detailsmentioning

confidence: 99%

Seismic Design and Performance of Composite Coupling Beam-to-SpeedCore Wall Connections

Varma,

Ahmad,

Shafaei

et al. 2024

Eng J

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Coupled composite plate shear walls—concrete filled (CC-PSW/CFs) are an effective seismic lateral-force-resisting system for the design and construction of mid- to high-rise buildings around the world. The coupled system consists of two or more composite plate shear walls—concrete filled (C-PSW/CFs) connected to each other using composite coupling beams located at the story heights. The CC-PSW/CF system can provide higher overturning moment capacity, lateral stiffness, and ductility than uncoupled walls. Concrete-filled steel box sections are typically used for the composite coupling beams, which are designed to be flexure critical members. When the CC-PSW/CF system is subjected to lateral seismic forces, plastic hinge formation and inelastic deformations (energy dissipation) occur near the ends of most of coupling beams along the structure’s height, followed by flexural hinging of the C-PSW/CFs, typically at the base. This paper presents the details and design of four composite coupling beam-to-C-PSW/CF connection configurations. Six connection specimens representing the four connection configurations, with beam clear span-to-section depth, Lb/d, ratios of 3.5 and 5.1, were designed and tested. The lateral force-displacement and moment-rotation responses of the specimens are summarized. All six composite coupling beam-to-C-PSW/CF wall connection specimens (1) developed and exceeded the plastic flexural capacities, Mp, of the coupling beams calculated using the plastic stress distribution method and (2) developed chord rotation capacities greater than 0.03 radian before their flexural strength degraded to 80% of the plastic moment capacity, Mp.

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Section: Test Specimen Detailsmentioning

confidence: 99%

Seismic Design and Performance of Composite Coupling Beam-to-SpeedCore Wall Connections

Varma,

Ahmad,

Shafaei

et al. 2024

Eng J

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“…At present, the research on replaceable coupling beams mainly focuses on steel coupling beams and is mainly applied to frame structures. Farsi et al [14] tested replaceable steel coupling beams with end-plate connections to evaluate the seismic behavior and replaceability after the damage of coupling beams with different strengths and stiffness. The results showed that the failure of the coupling beam is characterized by concentrated inelastic deformation and energy dissipation on the web, and the failure of the shear wall is very small.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Seismic Performance of Diagrid Core-Tube Structure with Replaceable Steel Coupling Beam

Liu,

Li,

et al. 2024

Sustainability

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The diagrid core-tube structure has been widely used in high-rise buildings in recent years, but there are few studies on the sustainable energy dissipation measures and seismic performance improvement of such structural systems. Because the coupling beam is the element connecting the inner tube and the outer tube in the diagrid structure, it is the first seismic defense line and an important energy-dissipation member in the seismic design of the overall structure. Therefore, this paper replaces the traditional reinforced concrete coupling beam of the inner tube of the shear wall with a replaceable energy-dissipation steel coupling beam, and the strength, stiffness, and stability of the replaceable steel coupling beam are designed to improve the sustainability of the structure. By changing the position of the replaceable coupling beam, the relative stiffness of the inner and outer tubes of the diagrid tube structure, and the plane form of the structure, the static elastoplastic analysis and seismic response energy analysis of different diagrid tube structures are carried out, and the influence of the replaceable coupling beam on the sustainable seismic performance of the diagrid tube structure is studied. The results show that the replaceable coupling beams have little effect on the ultimate bearing capacity of the structure, but the ductility and sustainability of the structure are significantly improved, and the whole building layout is the optimal layout scheme. The setting of replaceable coupling beams makes the diagrid tube structure show hysteretic energy-dissipation earlier under the action of large earthquakes, and the proportion of hysteretic energy-dissipation is greatly improved, which reduces the inter-story drift ratios and the damage degree of the diagrid columns under the action of large earthquakes. When the relative stiffness of the outer tube of the diagrid tube structure is small or the plane form of the structure is a regular quadrilateral, the application of replaceable coupling beams is more effective in improving the ductility and sustainability of the structure and reducing the damage to the diagrid column under large earthquakes.

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“…In addition, shape memory alloy (SMA) washers are used at the footings of RC piers to improve the self-centering capability and energy dissipation of bridges [24]. Other replaceable elements including steel coupling beams with specific connections [25] and low-yield-point connections of steel frames [26], are able to cost-effectively enhance the postdamage capacity.…”

Section: Introductionmentioning

confidence: 99%

Seismic Behavior of Box Steel Bridge Pier with Built-In Energy Dissipation Steel Plates

Han

Jiang²,

Zheng

et al. 2022

Advances in Materials Science and Engineering

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Based on the design concept of earthquake-resilient structure, a new-type of box-shaped steel piers with embedded energy-dissipating steel plates was proposed. Quasi-static tests of 6 box-shaped steel pier specimens under variable axial pressure and cyclic horizontal loading were carried out. By analyzing the failure mode, load-displacement hysteretic curve, skeleton curve, displacement ductility coefficient, stiffness degradation characteristics, strength degradation coefficient, and cumulative hysteretic energy, the effects of setting energy-dissipating steel plate, axial compression ratio, and thickness of energy dissipation steel plates on the seismic performance of new-type steel piers were discussed. Finite element models of steel bridge piers were established and compared with the test results. The analysis results using FEM agree well with the test results. Results show that the setting of energy-dissipating steel plates can effectively improve the ductility, deformation capacity, and energy-dissipating capacity of box-shaped steel piers, and effectively delay buckling deformation and cracking of wall plates. The steel plate near the bolt hole of the wall plate at the root of the new-type of box-shaped steel piers is easy to crack due to stress concentration, resulting in a rapid reduction of the maximum bearing capacity of the specimens. With the increase of axial compression ratio, the bearing capacity, energy-dissipating capacity, and earthquake-resilient capacity of the specimens increase. The smaller the thickness of the replaceable energy-dissipating steel plates, the smaller the bearing capacity and faster the stiffness degradation of the specimens become, while the ductility and energy-dissipating capacity of the specimens are improved. The axial compression ratio and the thickness of the energy-dissipating steel plate have relatively little effect on the strength degradation of the specimens. In order to facilitate the popularization and application of the new-type steel piers, formulas were also established to calculate the bearing capacity and displacement ductility factor of the new-type of box-shaped steel piers.

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Experimental study of a replaceable steel coupling beam with an end-plate connection

Cited by 42 publications

References 15 publications

Seismic Design and Performance of Composite Coupling Beam-to-SpeedCore Wall Connections

Seismic Design and Performance of Composite Coupling Beam-to-SpeedCore Wall Connections

Sustainable Seismic Performance of Diagrid Core-Tube Structure with Replaceable Steel Coupling Beam

Seismic Behavior of Box Steel Bridge Pier with Built-In Energy Dissipation Steel Plates

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