期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2016
卷号：5
期号：9
页码：18861
DOI：10.15680/IJIRSET.2016.0509050
出版社：S&S Publications
摘要：Damage reports on recent earthquakes have indicated that torsional motions often cause significantdamage to buildings, at times leading to their collapse. The objective of this work aimed a better understanding of thetorsional behaviour of building systems. In this analysis both symmetric and asymmetric structures with planirregularity are compared. Symmetric structures have centre of mass coinciding with the centre of rigidity and thetorsion effect in such structures occurs out of accidental eccentricity whereas in asymmetric structures have irregulardistribution of mass and stiffness and its centre of mass and centre of rigidity do not coincide and hence causes thetorsional effect on the structures which is one of the most important factor influencing the seismic damage of thestructure. To assess the torsional effect on the structures in the present study 4 types of structures having same outerperimeter area are considered and strengthened by introduction of shear wall cores. A simple linear comparison basedon eccentricity is also carried out for G+12 and G+17 structures. Structures with asymmetric distribution of mass andstiffness undergoes torsional motions during earthquake. The performance of the structures is assessed as per theprocedure prescribe in IS 1893:2002 and ASCE 7-05. The analysis of the structural models is carried out using ETABSsoftware.
关键词：Torsional irregularity; Plan asymmetry; Eccentricity; Shear wall core.
