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Structural Engineering and Mechanics
  Volume 74, Number 1, April10 2020, pages 121-128

Infill wall effects on the dynamic characteristics of RC frame systems via operational modal analysis
Mehmet A. Komur, Mehmet E. Kara and Ibrahim O. Deneme

    This paper presents an experimental study on the dynamic characteristics of infilled reinforced concrete (RC) frames. A 1/3-scaled, one-bay, three-storey RC frame was produced and tested by using operational modal analysis (OMA). The experiments were performed on five specimens: one reference frame with no infill walls and four frames with infill walls. The RC frame systems included infill walls made of hollow clay brick, which were constructed in four different patterns. The dynamic characteristics of the patterns, including the frequency, mode shapes and damping ratios in the in-plane direction, were obtained by 6 accelerometers. Twenty-minute records under ambient vibration were collected for each model, and the dynamic characteristics were determined using the ambient vibration testing and modal identification software (ARTeMIS). The experimental studies showed that the infill walls significantly affected the frequency value, rigidity and damping ratio of the RC frame system.
Key Words
    operational modal analysis; dynamic characteristics; ambient vibration; RC frames
Department of Civil Engineering, Aksaray University, 68100 Merkez, Aksaray, Turkey

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