A novel structural system based on precast reinforced concrete (RC) shear wall panels mutually connected vertically using T-connectors and horizontally using friction-bearing devices (FBDs) mounted on interposed steel columns was recently proposed. To investigate the seismic performance of the proposed precast RC shear wall system, three subassembly specimens simulating a single construction modulus were constructed and tested by considering different slot length and numbers of FBDs under quasi-static cyclic loading. Ductile flexural failure at drift of around 4.2% and load of around 265 kN was attained for both specimens with long-slot FBDs, while shear failure after moderate flexural ductility was attained at drift of around 3.8% and higher load of around 368.3 kN for specimens with short-slot FBDs, showing not-direct dependence of the load capacity on the number of FBDs installed. However, the higher number of FBDs allowed for higher hysteretic damping with a 27.3% increase in dissipated energy through cycles.

Performance study of precast reinforced concrete shear walls with steel columns containing friction-bearing devices

Dal Lago B.;
2021-01-01

Abstract

A novel structural system based on precast reinforced concrete (RC) shear wall panels mutually connected vertically using T-connectors and horizontally using friction-bearing devices (FBDs) mounted on interposed steel columns was recently proposed. To investigate the seismic performance of the proposed precast RC shear wall system, three subassembly specimens simulating a single construction modulus were constructed and tested by considering different slot length and numbers of FBDs under quasi-static cyclic loading. Ductile flexural failure at drift of around 4.2% and load of around 265 kN was attained for both specimens with long-slot FBDs, while shear failure after moderate flexural ductility was attained at drift of around 3.8% and higher load of around 368.3 kN for specimens with short-slot FBDs, showing not-direct dependence of the load capacity on the number of FBDs installed. However, the higher number of FBDs allowed for higher hysteretic damping with a 27.3% increase in dissipated energy through cycles.
2021
2021
Cyclic loading test; Friction-bearing devices; Hysteretic damping; Precast RC shear walls; Seismic performance; Structural joints.
Fang, Q.; Qiu, H.; Sun, J.; Dal Lago, B.; Jiang, H.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11383/2123602
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