Seismic Performance of Nonstructural Brick Walls Used in Indonesian R/C Buildings

Abstract

This paper describes the effects of nonstructural brick walls on the seismic performance of reinforced concrete (R/C) buildings. Experimental and analytical studies were conducted on two buildings: one of which collapsed and the other suffered moderate damage due to the 2007 Sumatra, Indonesia earthquakes. A brick wall was extracted from the moderately damaged building and transported to Japan from Indonesia to experimentally evaluate its seismic performance. Two R/C one-bay frame specimens were constructed, and the imported wall was installed in one of the specimens. Comparing the seismic performance of specimens with and without the brick wall through quasi-static cyclic loading tests, wall contributions were quantitatively evaluated. Moreover, the seismic performance of the earthquake-damaged Indonesian buildings was evaluated numerically considering the findings of the tests. The analyses revealed a possible reason for the collapse of one of the buildings due to the earthquakes.

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

“…They concluded that the masonry infill increased the stiffness and strength of the global structures despite increases in the inertia forces. The authors also performed cyclic loading tests on typical Indonesian R/C frames with brick masonry infill, finding that the masonry infill increased the overall stiffness and strength but decreased the ductility. In contrast, Zovkic et al reported that the deformation capacities of ductile R/C frames designed according to Eurocode 8 were not decreased by the presence of brittle infill.…”

“…The specimens represented a partial frame of the moderately damaged building (Figure (c)). The following experimental program and results have been partially reported in Maidiawati et al with the exception of two specimens with infill consisting of scaled bricks.…”

“…A number of studies on in‐plane earthquake simulation tests of masonry‐infilled R/C frames have been conducted to evaluate the contribution of masonry infill to their structural performance (e.g. ). The test results revealed that the masonry infill can drastically change the performance of the R/C frames in terms of the in‐plane stiffness and strength.…”

Modeling of interactions between RC columns and masonry infill in buildings with a column‐sway mechanism

“…This assumption indicates that a strain profile along the strut width is similar to the profile of the quotient obtained by (d i (y) À d c (y))/l s (y) as shown in the close-up in Figure 1b. Thus, the averaged stress, f m of strut is represented by Equations (1) and (2) given an ideal linear relationship between stress and strain as follows:…”

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“…Pemodelan dinding bata diverifikasi dengan hasil pengujian model struktur rangka beton bertulang tanpa dinding (bare frame) dan struktur rangka diisi dengan dinding bata (infilled frame) yang dilakukan oleh penulis (Maidiawati et al 2011). Model struktur rangka dan dinding bata, seperti dintunjukkan dalam Gambar 6 mewakili bentuk struktur bangunan Indonesia, diuji dengan beban siklik statik seperti ditunjukkan pada skema pengujian dalam Gambar 7.…”