konjes Konya Journal of Engineering Sciences 2667-8055 Konya Technical University 10.36306/konjes.1599894 Earthquake Engineering Numerical Modelization in Civil Engineering System Identification in Civil Engineering Civil Construction Engineering Structural Dynamics Structural Engineering Deprem Mühendisliği İnşaat Mühendisliğinde Sayısal Modelleme İnşaat Mühendisliğinde Sistem Tanımlama İnşaat Yapım Mühendisliği Yapı Dinamiği Yapı Mühendisliği EXPERIMENTAL AND NUMERICAL INVESTIGATION ON THE EFFECT OF INFILL WALLS ON DYNAMIC BEHAVIOR IN RC STRUCTURES: SHAKE TABLE TESTS https://orcid.org/0000-0002-5316-9921 Nakipoğlu Abdulhamit KONYA TEKNİK ÜNİVERSİTESİ, MÜHENDİSLİK VE DOĞA BİLİMLERİ FAKÜLTESİ https://orcid.org/0000-0001-9686-9322 Döndüren Mahmud Sami KONYA TEKNİK ÜNİVERSİTESİ, MÜHENDİSLİK VE DOĞA BİLİMLERİ FAKÜLTESİ 03 01 2025 13 1 277 293 12 11 2024 02 12 2025 Copyright © 2004, Konya Journal of Engineering Sciences 2004 Konya Journal of Engineering Sciences

Infill walls have many positive and negative effects on reinforced concrete (RC) buildings under the effect of earthquakes, but these are often not taken into consideration sufficiently. The contribution of walls to stability and stiffness in particular is considerable. In the negative sense, due to various reasons, incorrect/incomplete use of infill walls can cause extremely fatal irregularities such as short columns and soft stories. In this study, the effect of infill walls on the dynamic behavior of reinforced concrete buildings was examined. The study was conducted on a dynamic basis in order to approach the behavior under the effect of earthquakes in a more realistic way. For this purpose, a 1/3 scale 2-storey single-span reinforced concrete frame was produced for the experiments. Forced vibration tests were carried out on the shake table in the reference state (bare frame) and in the infill-walled state. The sample was subjected to an artificial ground motion with a peak ground acceleration (PGA) value of 0.54 g in both states. Experimental modal analysis, load-displacement analysis, and numerical analysis on ETABS structural analysis software were done. As a result, it was observed that the infill walls significantly enhanced the stiffness, leading to a considerable reduction in displacement values. Calculations showed that the natural frequencies increased by approximately 5-10%, while the global damping ratio decreased by about 20%.

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