International Journal of Civil, Structural and Concrete Engineering

Authors:-Md. Tasbirul Islam, Md. Reazul Mumin, Sariah Ismail, Shafiqul Islam, Sristi Das Gupta

Abstract:-Since the beginning of modern age, building a structure on a soft soil has always been a challenge for engineers. Apart from gravity loads, effect lateral load like earthquake load can vary due to soil type. The problem of soil-structure interaction in the seismic analysis and design of structures has become increasingly important, as it may be inevitable to build structures at locations with less favorable geotechnical conditions in seismically active regions. The study was carried out to assess the effect of soil stiffness and conditions on RC frame displacement based on BNBC 2006 and proposed BNBC 2015. The variation in structural displacement due to different cases is investigated in this research. The structural displacements based on BNBC 2015 are always greater than that of BNBC 2006 for all proposed cases, considering similar soil condition. For all soil conditions, maximum increment in deflection generated for case 5 while the lowest increment found for case 2, as the analyses were static linear consideration, the earthquake load greatly influenced by the seismic zone coefficients. As the second highest deflection occurred in case 2 with the least increment, the structural cost in case 2 areas would be comparatively high considering the other areas but the structures will be least critical for new code consideration when the other parameters are same.