Energy-balance based plastic design and analysis of hybrid coupled wall system

A nonlinear 3D solid model of hybrid coupled wall system with steel boundary elements has been founded by using FEM software ABAQUS to study its hysteretic behavior under cyclic loading, which considering the geometric large deformation and materials nonlinearity. To verify the efficiency of the model, two specimens with various coupling ratios of 30% and 45% are analyzed, and the results of analysis are compared with test ones. As the bearing capacities of both agree well in different loading stages, so the FEM model has enough accuracy and could be used to study the seismic behavior of hybrid coupled wall system with steel boundary elements. In addition, the results show that this new system dissipates energy by shear deformation of steel beams along and plastic hinge deformation at the bottom of wall, so it has better seismic performance.

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Behavior and Design of Reinforced Concrete, Steel, and Steel-Concrete Coupling Beams

Earthquake Spectra ◽

10.1193/1.1586139 ◽

2000 ◽

Vol 16 (4) ◽

pp. 775-799 ◽

Cited By ~ 63

Author(s):

Kent A. Harries ◽

Bingnian Gong ◽

Bahram M. Shahrooz

Keyword(s):

Reinforced Concrete ◽

State Of The Art ◽

Lateral Loads ◽

Coupling Beams ◽

Coupled Wall ◽

Current State ◽

Energy Absorbing ◽

Coupled Wall Systems ◽

Wall System ◽

Critical Aspects

The efficiency of coupled wall systems to resist lateral loads is well known. In order for the desired behavior of the coupled wall system to be attained, the coupling beams must be sufficiently strong and stiff. The coupling beams, however, must also yield before the wall piers, behave in a ductile manner, and exhibit significant energy-absorbing characteristics. This paper reviews the current state of the art for the design of conventional reinforced concrete, diagonally reinforced concrete, steel, and composite steel-concrete coupling beams. Although not exhaustive, critical aspects of the design of these systems are presented.

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Modified Full Operator Hybrid Simulation Algorithm and its Application to the Seismic Response Simulation of a Composite Coupled Wall System

Journal of Earthquake Engineering ◽

10.1080/13632469.2012.676232 ◽

2012 ◽

Vol 16 (6) ◽

pp. 759-776 ◽

Cited By ~ 2

Author(s):

Chung-Chan Hung

Keyword(s):

Seismic Response ◽

Hybrid Simulation ◽

Simulation Algorithm ◽

Coupled Wall ◽

Wall System

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Seismic performance evaluation of coupled wall system with novel replaceable steel truss coupling beams

Advances in Structural Engineering ◽

10.1177/1369433218811530 ◽

2018 ◽

Vol 22 (6) ◽

pp. 1284-1296 ◽

Cited By ~ 3

Author(s):

Yong Li ◽

Ye Liu ◽

Shaoping Meng

Keyword(s):

Reinforced Concrete ◽

Seismic Response ◽

Time History ◽

Nonlinear Time History Analysis ◽

Coupling Beam ◽

Coupling Beams ◽

Coupled Wall ◽

Steel Truss ◽

Seismic Loadings ◽

Wall System

Coupled wall systems are often used in high-rise buildings in zone of high seismic risk to provide lateral resistance to earthquake loading. Once damaged, reinforced concrete coupling beams are costly and time-consuming to repair post-earthquake. To enhance the seismic resilience for coupled wall structures, a novel replaceable steel truss coupling beam is first introduced. The proposed replaceable steel truss coupling beam consists of chord members at the top and bottom, respectively, and two buckling-restrained energy dissipaters are employed in the diagonal direction. The energy dissipaters can yield first before the wall piers and dissipate large amounts of energy to protect the main structure under seismic loadings. In addition, the energy dissipaters can be easily installed and post-earthquake repaired through pin connection with the chord members. This article mainly focused on the numerical and theoretical analyses of the proposed replaceable steel truss coupling beam, and nonlinear analytical models were developed in PERFORM-3D. An 11-story prototype structure was designed per Chinese code. The seismic response of hybrid coupled wall system with replaceable steel truss coupling beams was evaluated using nonlinear time history analysis and compared with the response of reinforced concrete coupled wall system with reinforced concrete coupling beams under seismic loadings. Results show that the proposed replaceable steel truss coupling beam leads to a good seismic response with reduced interstory drifts of the systems and rotational demand in the beams and wall piers due to a large energy dissipation capacity and overstrength.

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