Journal ArticleDOI
Accidental Torsion in Buildings: Analysis versus Earthquake Motions
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In this article, a simplified analysis procedure has been developed to consider accidental torsion in building design that is rational and convenient relative to building codes, which is extended and evaluated in this paper against measured accidental Torsion determined from motions of 12 buildings with nominally-symmetric plan.Abstract:
A simplified analysis procedure has been developed to consider accidental torsion in building design that is rational and convenient relative to building codes. This procedure is extended and evaluated in this paper against measured accidental torsion determined from motions of 12 buildings—with nominally-symmetric plan—recorded during Northridge (1994), Loma Prieta (1989), Whittier (1987), and Upland (1990) earthquakes. The selected buildings include structures in reinforced concrete and in steel that cover a wide range of structural systems, including moment resisting frames, shear walls, braced frames, and hybrid systems. After the measured torsion is interpreted and compared to analytical estimates, it is demonstrated that this procedure is sufficiently accurate to be used in design applications.read more
Citations
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Journal ArticleDOI
Earthquake induced torsion in buildings:critical review and state of the art
TL;DR: In this paper, the authors present new findings that can explain long lasting controversies in this area and at the same time may raise questions about the adequacy of code provisions based on results from questionable models.
Journal ArticleDOI
An equivalent accidental eccentricity to account for the effects of torsional ground motion on structures
TL;DR: In this paper, the utility of procedures presented in ASCE 7 for treating accidental eccentricity as a means for accounting for the effects of torsional ground motion is examined by analysis of simple linear and nonlinear systems.
Journal ArticleDOI
Accidental eccentricity in symmetric buildings due to wave passage effects arising from near-fault pulse-like ground motions
TL;DR: In this paper, the authors investigated the characteristics of the accidental eccentricity in symmetric buildings due to torsional response arising from wave passage effects in the near-fault region.
Journal ArticleDOI
Accidental eccentricity in multistory buildings due to torsional ground motion
Dhiman Basu,Sandesh Giri +1 more
TL;DR: In this article, a framework for evaluating the minimum required accidental eccentricity due to torsional ground motion that can be used in developing the seismic code recommendations is presented. But the number of response candidates for a multistory building is many.
References
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Journal ArticleDOI
Elastic Earthquake Analysis of a Class of Torsionally Coupled Buildings
TL;DR: In this article, a simple procedure is developed for analysis of elastic response of a particular class of torsionally coupled multistory buildings to earthquake ground motion, characterized by smooth response spectra.
Journal ArticleDOI
Eccentricity in irregular multistory buildings
V. W.-T. Cheung,W. K. Tso +1 more
TL;DR: In this paper, the concept of eccentricity is extended from single-story buildings to multistory buildings by defining the locations of the center of the building's eccentricity in order to evaluate the seismic torsional effect on multi-dimensional buildings.
Journal ArticleDOI
Earthquake analysis of a class of torsionally‐coupled buildings
Reem Hejal,Anil K. Chopra +1 more
TL;DR: In this article, an effective procedure is summarized without derivation for estimating the maximum response of a class of torsionally-coupled, multi-storey buildings due to earthquake ground motion characterized by response spectra.
Journal ArticleDOI
Estimation of Accidental Torsion Effects for Seismic Design of Buildings
TL;DR: In this paper, a procedure for including the effects of accidental torsion in seismic design of buildings has been developed, which has four steps: first, the ratio between the fundamental frequencies of uncoupled torsional and lateral motions of the building is computed.
Journal ArticleDOI
Evaluation of Code Accidental‐Torsion Provisions from Building Records
TL;DR: In this article, a procedure is presented for evaluating building code provisions for accidental torsion from analysis of earthquake-induced motions of nominally symmetric-plan buildings, which is used to analyze the motions of three buildings recorded during recent California earthquakes.