Comparative Study On Lateral Load Analysis By BNBC - 1993 And Proposed BNBC - 2012
Journal: International Journal of Scientific & Technology Research (Vol.3, No. 11)Publication Date: 2014-11-15
Authors : Faria S. Imam; Saimah Tahsin; Asif Hassan;
Page : 57-61
Keywords : Index Terms building code; earthquake load analysis; inter storey drift; maximum lateral displacement; maximum reinforcement requirements; seismic base shear; and wind load analysis;
Abstract
Abstract The construction industry is changing fast due to continuing invention of new technologies construction equipments and materials. To keep pace with the advancement of technology it is required for the codes to be updated on a regular basis. Initiative has been taken to update BNBC Bangladesh National Building Code 1993 and a draft copy has already been prepared. Significant changes have been introduced in BNBC 2012 with regard to analysis for lateral loads. To identify the changes in design and analysis of various structures a comparative study is necessary to relook at the provisions of the present code and look for the feasibility of any change of the recent upgrading code. This study aims at the comparison of provisions of wind and earthquake analysis given in existing BNBC 1993 to that in proposed BNBC 2012. It is found that seismic base shear of the building calculated by BNBC 2012 varies significantly from seismic base shear calculated by BNBC 1993. Finally structural analysis and design of a typical apartment building situated in Dhaka City is conducted to demonstrate the changes regarding lateral load in proposed BNBC 2012 with respect to BNBC 1993. The basic differences in seismic base shear and maximum lateral displacement with varying number of stories using two codes are presented. The comparison in inter storey drift is also made for 6 storied and 12 storied building to show the effect in inter storey drift using two codes. Analysis is made to compare maximum reinforcement requirement for column design to provide guideline to the engineer for the most economic design.
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