Civil Insight: A Technical Magazine Volume 2 | Page 18

18 • • • TEACHERS’ SECTION CIVIL INSIGHT 2018 Irregularity in bottom portion of the building, especially in ground and fi rst story, does not have any signifi cant impact on the base and story shear, while the mass irregularity in the top portion of the building has signifi cant effect in the base and story shear. Story shear is signifi cantly changed when the irregularity is presented in that particular story. If i th story is mass irregular, then story shear of that i th story is signifi cantly higher than that of regular building i th story story shear. In light of the above points, it is concluded that the location of mass irregularity in top portion of the building signifi cantly vary the base and story shear and magnitude and location of the mass irregularity is also of signifi cance in the variation of base and story shear. ACKNOWLEDGEMENT The author acknowledges University Grants Commissions (UGC-Nepal), Sanothimi, Bhaktapur for the fi nancial support for the Master’s thesis, as the research is based on the work done for master’s thesis for the completion of the Degree of Masters in Structural engineering. REFERENCES [1] Varadharajan S, Shegal V K & Saini B, Seismic response of mulitstory reinforced concrete frame with vertical mass and stiffness irregularities, The structural design of tall and special buildings , 23(2012)5.DOI:10.1002/ tal.1045 [2] Takia N, Shigefuji M, Rajaure S, Bijukchhen S, Ichiyanagi M, Dhital M R &Sasatani T, Strong ground motion in the Kathmandu Valley during the 2015 Gorkha, Nepal, Earthquake, Earth Planets and Space , 68(2016)10. DOI: 10.1186/s40623-016-0383-7. [3] Al-Chaar, G. (2002). Evaluating strength and stiffness of unreinforced masonry infi ll structures . US Army Corps of Engineers, Engineering Research and development center. Construction Engineering Research Laboratory. [4] IS:1893 (2002). Criteria for earthquake resistant design of structures, General provisions and buildings. Bureau Of Indian Standards . Delhi, India: BIS. [5] IS:1905 (1989). Code of Practice for Structural use of unreinforced masonry. Delhi: Bureau Of Indian Standards , Delhi, India:BIS. [6] ETABS (2000). integratee software for structural analysis abd design, Berkeley (California) . Retrieved from Computers & Structures. [7] FEMA:356 (2000). Prestandaard and Commentry for the seismic behaviour of Buiildinds . Federal Emergency Management Agency.