Maximum Response of Buildings to Multi-Seismic Input

by F. Y. Cheng, Univ of Missouri-Rolla, MO, USA,
Jeng-Fuh Ger, Univ of Missouri-Rolla, MO, USA,



Document Type: Proceeding Paper

Part of: Dynamics of Structures

Abstract:

The paper presents a technique of determining the maximum response of a torsionally-translationally coupling structure subjected to three ground translational components. It was found that structure's response is dependent on the orientation of its principal axes and the seismic input direction. The conventional square-root-of-sum-of-square approach and the complete-quadratic-combination approach are used to obtain the critical seismic input angle which is expressed in terms of structure's participation factors, seismic spectra input, and the cross-modal coefficients. Numerical examples are provided to show the comparison of the structural response based on the critical seismic input angle and the input direction along the structure's principal axes for both SRSS and CQC approaches.

Subject Headings: Seismic tests | Seismic effects | Earthquake resistant structures | Dynamic structural analysis | Structural response | Structural analysis | Torsion

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