EFFECT OF BRICK MASONRY INFILLS TO SEISMIC CAPACITY OF INDONESIA MULTI-STORY RC BUILDING

Abstract

This paper discusses an analytical study on the effect of brick masonry infills to seismic capacity
of the multi-story reinforced concrete (RC) structures by using the finite element computer codes called
STructural Earthquake Response Analysis 3D (STERA 3D). A survived three-story RC building after the 2007
Sumatra earthquake was considered as an analytical model. The building was located in Padang city, West
Sumatera, Indonesia. The model was analyzed for pushover and time history analyses. The pushover analysis
was conducted followed UBC code and the recorded ground acceleration of 2009 West Sumatra earthquake
was applied as input motion in time history analysis. The structural detail and material properties used in the
analysis were collected from site investigated building after 2007 Sumatra earthquake. Two analytical RC
building models were analyzed and compared in this study, i.e. bare RC frame model and brick masonry infilled
RC frame model. The results of the analytical study were compared to the resume of the field observation after
the earthquake for the considered building. The analytical results are clearly shown that the brick masonry
infills may significantly improve the seismic capacity of the RC building. The RC building could be survived
to large ground motion even the building was designed by applying the old Indonesia building code.