EFFECT OF STRUCTURAL WALL AREA TO FLOOR AREA RATIO ON THE SEISMIC PERFORMANCE OF MID TO HIGH RISE REINFORCED CONCRETE BUILDINGS

Date

2025-11-28

Author

Güler, Göksu

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This study investigates the effect of increasing structural wall area to floor area ratio, referred to as the structural wall ratio, on the seismic performance of mid to high rise reinforced concrete buildings. A total of 35 building models are developed by combining five different number of stories (5, 7, 10, 20, and 30) with seven structural wall ratios (0.0%, 0.5%, 1.0%, 1.5%, 2.0%, 2.5%, and 3.0%). Nonlinear time history analyses are conducted in ETABS v22.4.0 using a suite of 11 ground motion records for each model. Seismic performance is assessed based on several key parameters including roof drift, maximum interstory drift, distribution of interstory drifts, base and story shear forces, base shear vs. roof drift response and the percentage of structural members with reinforcement yielding. The results reveal that increasing the structural wall ratio significantly improves seismic performance, primarily by reducing interstory drifts, and plastic deformations. The structural wall ratio of 1.0% significantly reduces the interstory drifts for all buildings. 5, 7 and 10 story buildings require approximately 1.0% structural wall ratio to shift the structural response from frame-dominated to cantilever wall-dominated behavior, while the same behavioral transition for 20 and 30 story buildings requires 1.5-2.0% structural wall ratio.

Subject Keywords

Structural Wall Ratio, Seismic Performance, Reinforced Concrete Buildings, Nonlinear Time History Analysis, Drift

URI

https://hdl.handle.net/11511/118303

Collections

Graduate School of Natural and Applied Sciences, Thesis