Author(s): Badr Hussien, Ahmed Yassin and Ayman H Khalil

Abstract: Self-centering concrete shear walls have been increasingly recognized as an effective lateral force-resisting system for enhancing the seismic resilience of structures. Unlike conventional reinforced concrete shear walls, self-centering concrete walls with controlled rocking, are designed to undergo controlled rotation at their base with minor residual drifts and damage following an earthquake. This behavior, combined with the restoring capability provided by unbonded post-tensioning tendons, allows the structure to re-center after seismic events and significantly limits permanent deformations and damage to structural and nonstructural components. In this regard, this paper presents a detailed numerical investigation of the behavior of self-centering concrete shear walls. A numerical macro model was developed using OpenSees to simulate the nonlinear response of the system under lateral loading. The model incorporates material and geometric nonlinearities to capture the wall’s flexural and rocking behavior accurately. Next, a validation of the proposed model was carried out by comparing the model results with the published experimental results found in literature. The results showed that the model simulation, demonstrated strong agreement in terms of walls strength, stiffness, and displacement capacity. Following validation, an extensive parametric study is performed to examine the influence of key design parameters including wall geometry, and concrete strength on the overall response. The findings of the current study provided a valuable insight into the fundamental mechanics governing self-centering wall systems and offer practical recommendations for their design and implementation in earthquake-resistant structures.

DOI: 10.22271/27078280.2025.v6.i2b.53

Pages: 89-95 | Views: 13 | Downloads: 5

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