EFFECT OF MODULUS OF MASONRY ON INITIAL LATERAL STIFFNESS OF INFILLED FRAMES WITH OPENINGS

Bhagyalaxmi sindagi, Anusha P Gowda, Harshitha R Kumar, M V Renukadevi

Abstract: Masonry infills are commonly used in buildings for functional and architectural reasons. The structural contribution of infill walls cannot simply be neglected particularly in regions of moderate and high seismicity where the frame-infill interaction may cause substantial increase in both stiffness and strength of the frame in spite of the presence of openings. In the present study an attempt is made to study the initial lateral stiffness of the infilled frames with central opening of different sizes for varying modulus of masonry (2750 Mpa and 1000 Mpa modulus) using the finite element analysis . The percentage reduction in the initial lateral stiffness of infilled frames due to varying modulus of masonry is obtained. The initial lateral stiffness of infilled frame is also determined by single equivalent diagonal strut analysis by varying the width of strut and a strut-width-reduction factor is proposed to determine the strut width for the opening present in the infill panel

Keywords: infilled frame, modulus of masonry, lateral stiffness, and effect of openings

DOI: https://doi.org/10.15623/ijret.2014.0318034