Seismic Performance of Symmetric and Asymmetric Multi-Storeyed Buildings
Sammelan Pokharel1, S. Lakshmi Ganesh2, G. Sabarish3
1Sammelan Pokharel, Department of Civil Engineering, SRKR Engineering College, Bhimavaram (Andhra Pradesh), India.
2S. Lakshmi Ganesh, Department of Civil Engineering, SRKR Engineering College, Bhimavaram (Andhra Pradesh), India.
3G. Sabarish, Department of Civil Engineering, SRKR Engineering College, Bhimavaram (Andhra Pradesh), India.
Manuscript received on 16 May 2019 | Revised Manuscript received on 10 June 2019 | Manuscript Published on 15 June 2019 | PP: 364-369 | Volume-8 Issue-1S3 June 2019 | Retrieval Number: A10660681S319/2019©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Multistoried buildings are very much common in the urban areas nowadays due to scarcity of land and increase in the cost of land. Many of these structures are not regular either in shape, stiffness or mass distribution. A structure with irregular configuration may be constructed so as to meet all the codal requirements, but the performance of such a structure will not be as good as a structure with regular configuration. It is even suggested to avoid such configuration but irregularity in structural components has been unavoidable due to various reasons. This paper aims to determine the differences in seismic performance of regular and irregular structures in plan and also to identify a suitable method that can be used in an asymmetric structure to reduce the effect of seismic load. Models of square-shaped, L-shaped and T-shaped G+4- and G+10-storied buildings are considered for analysis in Etabs software. From the static and dynamic analyses of these models, various parameters like storey shear, storey displacement and overturning moment have been calculated and compared. It is concluded that symmetrical structures are superior to asymmetric structures in view of resistance against seismic forces. Further, shear walls can be used in asymmetric structures to ensure safety against seismic forces.
Keywords: Lan Irregularity, Seismic Coefficient Method, Response Spectrum Method, Story Shear, Overturning Moment.
Scope of the Article: Building Energy