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Paper Title: Analysis Of Fundamental Natural Period Of Irregular Rcc Framed Structure
Authors Name: Palash Vaidya , Dr. G.D Awchat
Unique Id: IJSDR1607017
Published In: Volume 1 Issue 7, July-2016
Abstract: 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.
Keywords: analysis, Fundamental Natural period analysis, setbacks, Mass irregularity, Vertical irregularity, Time Period.
Cite Article: "Analysis Of Fundamental Natural Period Of Irregular Rcc Framed Structure", International Journal of Science & Engineering Development Research (www.ijsdr.org), ISSN:2455-2631, Vol.1, Issue 7, page no.83 - 105, July-2016, Available :http://www.ijsdr.org/papers/IJSDR1607017.pdf
Downloads: 0001434
Publication Details: Published Paper ID: IJSDR1607017
Registration ID:160600
Published In: Volume 1 Issue 7, July-2016
DOI (Digital Object Identifier): http://www.dx.doi.org/10.6084/m9.figshare.4981718
Page No: 83 - 105
Publisher: IJSDR | www.ijsdr.org
ISSN Number: 2455-2631

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