Seismic Behaviour and Design of Irregular and Complex Civil Structures III by Dietlinde Köber & Mario De Stefano & Zbigniew Zembaty

Author:Dietlinde Köber & Mario De Stefano & Zbigniew Zembaty
Language: eng
Format: epub
ISBN: 9783030335328
Publisher: Springer International Publishing

18.2 Torsional Provisions

The previous generation of seismic codes was providing design eccentricities for equivalent static analysis (Eq. 18.1) as follows:

(18.1)

where ed is the design eccentricity, e0 is the actual distance between the Centre of Mass (CM) and the Centre of Rigidity (CR) measured orthogonally to the loading direction; b is the building dimension perpendicular to the direction of excitation, α is a coefficient accounting for dynamic amplification of the torsional response and β is a coefficient accounting for aleatoric position of the CM.

In Table 18.1 coefficients α and β are provided according to Eurocode 8 1993 (EC8-93) (European Committee for Standardization, Eurocode 8 1993), National Building Code of Canada 1995 (NBCC-95) (Associate Committee on the National Building Code, National Building Code of Canada 1995) and ASCE Standard 7-10 (ASCE 7-10) (ASCE, Minimum Design Loads for Buildings and Other Structures, ASCE/SEI 7 2010), where Ax is the amplification factor provided by ASCE 7-10 (defined in the following) and e2 is the additional eccentricity provided by EC8-93, equal to the smaller of the following values:

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.