Nonlinear Behavior of Precast Concrete Coupling Beams under Lateral Loads
- 1 November 2007
- journal article
- Published by American Society of Civil Engineers (ASCE) in Journal of Structural Engineering
- Vol. 133 (11), 1571-1581
- https://doi.org/10.1061/(asce)0733-9445(2007)133:11(1571)
Abstract
This paper presents an analytical investigation of the nonlinear behavior of precast concrete coupling beams under monotonic lateral loading. In contrast to conventional monolithic concrete coupling beams, coupling of reinforced concrete wall piers in the proposed system is achieved by posttensioning the beams and the walls together at the floor and roof levels. Under lateral loads, the nonlinear deformations of the coupling beams occur primarily due to the opening of gaps at the beam-to-wall interfaces. The new system offers several advantages over monolithic systems, such as simpler detailing for the beams and the wall piers (no need for diagonal reinforcement crossing the beam-to-wall joints), reduced damage to the structure, and an ability to self-center, thus reducing the residual lateral displacements of the building after a large earthquake. Steel top and seat angles are used at the beam ends to yield and provide energy dissipation during the earthquake. The paper investigates the effects of design parameters, such as the amount of posttensioning, beam and wall properties, and top and seat angle properties, on the lateral strength and displacement characteristics of floor-level coupling beam subassemblies. The results are used to determine how the system behavior can be controlled by design. A procedure to estimate the nonlinear lateral load-deformation relationship of the subassemblies is developed.Keywords
This publication has 13 references indexed in Scilit:
- Experimental Evaluation of Posttensioned Hybrid Coupled Wall SubassemblagesJournal of Structural Engineering, 2006
- A Friction Damper for Post-Tensioned Precast Concrete Moment FramesPCI Journal, 2004
- Posttensioned Hybrid Coupled Walls under Lateral LoadsJournal of Structural Engineering, 2004
- Posttensioned Energy Dissipating Connections for Moment-Resisting Steel FramesJournal of Structural Engineering, 2002
- Ductility and Deformability of Coupling Beams in Reinforced Concrete Coupled WallsEarthquake Spectra, 2001
- Behavior and Design of Reinforced Concrete, Steel, and Steel-Concrete Coupling BeamsEarthquake Spectra, 2000
- Preliminary Results and Conclusions From the PRESSS Five-Story Precast Concrete Test BuildingPCI Journal, 1999
- Seismic Behavior and Design of Unbonded Post-Tensioned Precast Concrete FramesPCI Journal, 1999
- Model Precast Concrete Beam-to-Column Connections Subject to Cyclic LoadingPCI Journal, 1993
- Theoretical Stress‐Strain Model for Confined ConcreteJournal of Structural Engineering, 1988