Nonlinear response of shear walls for seismic design and analysis

Date

2025-11-28

Author

Yurtseven, Fırat

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In the design of reinforced concrete (RC) buildings, shear walls play a critical role as the primary lateral load-resisting and drift-controlling elements under seismic actions. The devastating 2023 earthquakes in Türkiye showed that buildings lacking shear walls either collapsed or suffered extensive damage. On the other side, buildings with shear walls exhibited varying levels of performance; some of these experienced damages consistent with design expectations, while others showed unexpected failure patterns. This highlights the importance of shear wall design and performance assessment and reveals the uncertainty in performance prediction. Due to their larger cross-sectional dimensions, high shear force demands and complex geometries in building layouts, the behavior of shear walls is inherently more complicated to assess than that of beams and columns. Various numerical modeling techniques, ranging from simplified macro models to detailed finite element models, are used to model RC shear walls. This study aims to (i) evaluate strain-demand predictions for cantilever shear walls by taking as a starting point, using two different modeling techniques, and propose a practical approach to improve the consistency of performance estimations, and (ii) investigate the influence of the amount of shear walls on building-level seismic performance. To address these aims, two complementary numerical studies were conducted. The first study focuses on obtaining and improving strain-demand estimations through a comparative investigation of modeling approaches applied to cantilever walls. The second work examines the seismic performance of buildings by exploring the relationship between interstory drift ratio demands and the amount of shear walls provided. Together, these studies seek to bridge the gap between simplified and detailed numerical models, also offering recommendations on adequate wall provision for achieving target seismic performance.

Subject Keywords

Shear wall, Shear wall damage prediction, Performance assessment, Nonlinear analysis, Layered shell element

URI

https://hdl.handle.net/11511/118259

Collections

Graduate School of Natural and Applied Sciences, Thesis