R/C frame–infill interaction model and its application to Indonesian buildings

Abstract

SUMMARYThis paper proposes a new analytical model for masonry-infilled R/C frames to evaluate the seismic performance considering R/C frame-infill interactions. The proposed analytical model replaces masonry infill with a diagonal compression strut, which represents distributed compression transferred between frame and infill interfaces. The equivalent strut width is presented as a function of the frame-infill contact length, which can be evaluated by static equilibriums related to compression balance and lateral displacement compatibility at the frame-infill interfaces. The proposed analytical model was verified through comparisons with experimental results obtained for several brick masonry-infilled R/C frames representing a typical R/C building with nonstructural masonry infill in Indonesia. As a result, good agreements were observed between the experimental and analytical values of the lateral strength and ductility of the infilled frames. The seismic performances of two earthquake-damaged R/C buildings with different damage conditions were evaluated considering infill effects by applying the proposed analytical model. Consequently, the nonstructural brick masonry infill significantly affected the seismic resistances of the buildings, which seemed to lead to differing levels of damage for each building. These results indicate that the proposed analytical model can be an effective tool for more precisely screening earthquake-vulnerable existing R/C buildings in Indonesia.

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“…Penulis juga telah mengembangkan sebuah metoda analisis dinding bata dalam struktur rangka (Maidiawati et. al, 2012(Maidiawati et. al, , 2013.…”

Seismic performance of brick masonry infilled frame structures with bed joint reinforcements

“…Masonry walls are ubiquitously used as infill in reinforced concrete (RC) frame structure buildings in high seismic region. According to post-earthquake observation results, the presence of masonry infills influenced the behavior of RC building during an earthquake [1,2]. The results of the previous studies have been summarized that unreinforced brick masonry infill contributes to increase the lateral strength and stiffness but decrease the ductility of infilled RC frame structures [2][3][4][5].…”

Behaviour of Reinforced Concrete Frames with Central Opening Masonry Infill under Lateral Reversed Cyclic Loading.

“…This issue is caused by the shortage of the knowledge of the performance of brick wall under seismic loads. Several experimental and analytical studies have been reported that masonry infills strongly affected seismic performance of RC buildings [1][2][3][4][5]. Nevertheless, most of them concentrated to study the seismic behaviour of RC frame buildings using the solid masonry wall.…”

“…Nevertheless, most of them concentrated to study the seismic behaviour of RC frame buildings using the solid masonry wall. In the previous study, the first author also has calculated the seismic capacity of RC buildings including the contribution of brick masonry infill by applying a developed analytical model of infill frame [3]. But, the presence of brick infills with openings was excluded in evaluation which guessed that no contribution from the infills with openings on the earthquake resistance of RC frame structures as reported on the Reference [6].…”