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- Title
Modeling and parameter identification of asymmetric restoring force of reinforced concrete shear walls.
- Authors
Lina, Zhou; Senlin, Zhang
- Abstract
Under the action of the seismic waves, reinforced concrete shear walls (RC shear walls) often exhibit hysteresis characteristics such as strength and stiffness degradation, and pinching effects due to factors such as slippage, cumulative damage of concrete, and non-uniform corrosion of steel bars or reinforcements. The hysteresis curve is asymmetric. In this paper, a nonlinear restoring force mechanical model, based on the Bouc-Wen-Baber-Noori (BWBN) model, that can describe the hysteresis characteristics of the RC shear wall is obtained by introducing the asymmetry factor. Particular attention is the solution of equation that the hysteretic energy ε at different loading stages in this model is regarded as parameters to be identified. The ordinary differential equations for parameter identification are derived into four segments. The improved particle swarm organization (IPSO) algorithm is used for parameters identification, which superiority is verified by comparison to the genetic algorithm. The accuracy of this model is verified by using RC shear wall finite element simulation data.
- Subjects
PARAMETER identification; CONCRETE walls; REINFORCED concrete corrosion; SHEAR walls; SEISMIC waves; ORDINARY differential equations
- Publication
Advances in Mechanical Engineering (Sage Publications Inc.), 2023, Vol 15, Issue 8, p1
- ISSN
1687-8132
- Publication type
Article
- DOI
10.1177/16878132231192226