The recent revision of the Bangladesh national building code (BNBC) necessitates the buildings designed in the old code be assessed for their adequacy to satisfy seismic provisions of the revised BNBC. The existing evaluation manual in Bangladesh is based on the Japanese second-level evaluation method that considers the strong-beam weak-column failure. However, the buildings designed according to the previous code consider the strong-column weak-beam failure. Therefore, the proposed detailed seismic evaluation (DSE) method capable of capturing this effect and providing a simple index resembling the existing manual was tested in a low-rise building. Moreover, in design, ignoring the brick infill can alter the strength and deformation behavior of the columns and the story's capacities accordingly. This research aims to assess the variation of story-wise performance considering the infill wall for a low-rise building designed according to the previous code. Additionally, the low-cost strength-based ferrocement (FC) retrofit was tested as a performance improvement technique. The draft copy of the SATREPS manual was used as a basis for calculating wall capacity for both untreated and FC treated. This research found that the DSE method provides more realistic seismic performance capturing reasonable failure mechanisms initiated by plastic hinges in beams than the JBDPA second level evaluation. Moreover, the contribution of suitably configured solid masonry walls can improve both strength and deformation behavior and thus increase safety, leading to more economic evaluation. Additionally, the Out-of-plane capacity for walls was found to be larger than the in-plane capacity. FC retrofit method proved to be a convenient way to improve performance without intervening in the columns or RC walls. Therefore, it is expected to conduct further analysis under other considerations not estimated in the present research in the future.
Keywords: Detail seismic evaluation method, infill wall effect, ferrocement retrofit