Analysis Of Fundamental Natural Period Of Irregular Rcc Framed Structure
Palash Vaidya
, Dr. G.D Awchat
analysis, Fundamental Natural period analysis, setbacks, Mass irregularity, Vertical irregularity, Time Period.
The determination of the fundamental natural period of vibration is essential to design a structure against earthquake loading. Current design codes in India such as IS 1893(Part 1):2002 or IS 875 (Part III):1987 provide formulas for the approximate period of earthquake-resistant building systems, which are dependent only on the height of the structure or number of stories. Such a formulation is overly conservative and unable to account for structures with geometric irregularities. This study investigates the fundamental periods of different types of reinforced concrete earthquake resistant building structures having structurally irregular frames (both vertical and horizontal). A total of 66 MRF structures for set-back, 168 MRF structures for mass irregularity, 90 MRF structures for soft-storey irregularity, 72 MRF structures for re-entrant corner irregularity and 160 MRF structures for torsional irregularity due to heavy mass are analyzed with STAAD.Pro-V8i. The fundamental periods based on vibration theory for each example were compared with current code equations. Through statistical comparison, it was found that a multi-variable power model which is able to account for irregularities resulted in a better fit to the Rayleigh data than equations which were dependent on height only. The proposed equations were validated through a comparison of available measured period data. These proposed equations will allow design engineers to quickly and accurately estimate the fundamental period of moment resisting frame structures by taking into account these types of irregularities.
"Analysis Of Fundamental Natural Period Of Irregular Rcc Framed Structure", IJSDR - International Journal of Scientific Development and Research (www.IJSDR.org), ISSN:2455-2631, Vol.1, Issue 7, page no.83 - 105, July-2016, Available :https://ijsdr.org/papers/IJSDR1607017.pdf
Volume 1
Issue 7,
July-2016
Pages : 83 - 105
Paper Reg. ID: IJSDR_160600
Published Paper Id: IJSDR1607017
Downloads: 000346998
Research Area: Engineering
Country: durg, chhattisgarh, India
DOI: http://www.dx.doi.org/10.6084/m9.figshare.4981718
ISSN: 2455-2631 | IMPACT FACTOR: 9.15 Calculated By Google Scholar | ESTD YEAR: 2016
An International Scholarly Open Access Journal, Peer-Reviewed, Refereed Journal Impact Factor 9.15 Calculate by Google Scholar and Semantic Scholar | AI-Powered Research Tool, Multidisciplinary, Monthly, Multilanguage Journal Indexing in All Major Database & Metadata, Citation Generator
Publisher: IJSDR(IJ Publication) Janvi Wave
