SEISMIC RESPONSES OF RC FRAME WITH DIFFERENT ARRANGEMENT OF MASONRY INFILL WALL

Abstract

This study presents the suitability of using macro model (strut model) for analyzing the seismic responses of single-story single-span reinforced concrete frames having different arrangement of masonry infill wall with openings by com­par­ing its results with those using micro model (wall-element model). From the result, the infill masonry wall increases the stiffness of RC frame structure. Meanwhile, the dia­gonal strut model will give smaller natural frequencies than wall-element model. When the part of the wall opening causes the wall to have no contact with a column, short column effect will be introduced in the column. Wall-element model can predict better the short column effect than the strut model. Although under static lateral load re­placing masonry infill wall by diagonal strut was considered to be suitable for com­puting the response structure behaviour for the case without any opening in infill wall, but it is not the case for the dynamic analysis.