Earthquake design of buildings in Australia using velocity and displacement principles

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Title: Earthquake design of buildings in Australia using velocity and displacement principles
Author(s): Wilson, John L.; Lam, Nelson T. K.; Griffith, Michael C.
Abstract: The effectiveness of the traditional force-based (FB) design method based on the use of the acceleration response spectrum has inherent shortcomings due to uncertainties in the estimation of the lateral stiffness and natural periods in building structures. The narrow perception of seismic actions as inertia forces (or acceleration demands) has been broadened in this paper to embrace the concepts of both velocity (energy) demand and displacement demand. A structure is deemed to perform satisfactorily if any one of the criteria based on velocity, displacement or acceleration is satisfied. Consequently, structures can be scanned quickly using one of the criteria to identify those requiring a follow-up assessment. The displacement criterion may be used for the initial assessment in view of its relative simplicity. The velocity criterion may then be used for the follow-up assessment which involves intercepting the capacity curve with the demand curve to determine the performance point. This new and simple approach of assessing the potential seismic performance of building structures is introduced in this paper in the Australian context. Drift demand ratios of buildings have been tabulated for different site classes and number of storeys in the building to facilitate the application of Displacement-Based (DB) assessment. Implications of DB design for reinforced concrete, steel and unreinforced masonry buildings are discussed.
Publication type: Journal article
Research centre: Swinburne University of Technology. Faculty of Engineering and Industrial Sciences
Source: Australian Journal of Structural Engineering, Vol. 6, no. 2 (2006), p. 103-118
Publication year: 2006
Keyword(s): Buildings; Earthquake effects; Earthquake engineering; Earthquake resistant design; Data processing; Reinforced concrete construction; Testing; Structural analysis; Engineering; Mathematical models; Designs; Plans
Publisher: Institution of Engineers Australia
ISSN: 1328-7982
Copyright: Copyright © Institution of Engineers Australia 2006. Publisher does not officially support author/institution self-archiving of either the postprint (final, revised accepted draft) or published version of full text.
Peer reviewed