Seismic Performance Evaluation of Wall Equivalent Frame System Reinforced Concrete Building Structure
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Date
2025-06
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Addis Ababa University
Abstract
These days, predicting inelastic seismic responses and evaluating a structural building's seismic performance are crucial topics. This thesis evaluates the seismic performance of wall equivalent frame system reinforced concrete building structures, categorized as low rise, medium rise, and high rise, with a particular emphasis on this idea. The pushover analysis approach is used to evaluate the nonlinear response of the RC buildings under consideration in this thesis. Various shear wall locations are used, along with the presence or absence of slab openings and the introduction of irregularities in plan and elevation.
Twelve Wall equivalent frame system reinforced concrete building models with ductility class medium have had examined their performance using the finite element analysis program ETABS 2021.1.1. Every model has been analyzed (response spectrum analysis) and designed (capacity design) in compliance with Ethiopian building codes and requirements. The performance for the models (G+5, G+15 and G+30) has been evaluated by discussing the results of the nonlinear static analysis.
The seismic performance evaluation is carried out for different shear wall location, presence of slab opening and introduction of irregularity. The building's top story displacement, inter-story drift, capacity curve and plastic hinge distribution are the parameters used to evaluate the seismic performance of the structures. Based on this, the Top displacement value shows increment in Y Direction for the parameters; placing shear wall at the center by 5% relative to the edge, effect of having opening increase the Top displacement by 2% and having a plan irregular building increase the result by 10%.Introducing Irregularity in the building decrease the performance level by 0.8%, 5%, 8% for low, medium and high rise building respectively and having shear wall at the center by 0.4%,4% and 6%, the least effect is shown for introducing opening which is 0.1%, 0.9% and 2% for the buildings under consideration.
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Keywords
Response spectrum analysis, Pushover analysis, Irregularity, Seismic performance