Compensation of Dynamic Response for Concrete and Masonry Structures Using a Microcomputer

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Title: Compensation of Dynamic Response for Concrete and Masonry Structures Using a Microcomputer

Author(s): D. P. Abrams

Publication: Special Publication

Volume: 98

Issue:

Appears on pages(s): 159-182

Keywords: buildings; computation; dynamic response; earthquakes; hysteresis; masonry; microcomputers; reinforced concrete; Structural Research

Date: 3/3/1987

Abstract:
A computational procedure is described for determining nonlinear response of a building system subjected to earthquake motion. The method is sufficiently simple for use with a microcomputer because system response is expressed in terms of a single generalized coordinate. Deflected shapes for the systems are assumed to be invariant for all amplitudes of motion. The equation of motion is integrated for each instant of response on the basis of a normalized relation between base shear and top-level deflection. The hysteretic relation is constructed for each new cycle using cubic segments to express a path from initial unloading through force and deflection reversals to the point of maximum deflection. The base motion is selected from a menu of earthquake records stored on diskette. Results displayed on screen consist of histories of acceleration at the top-level and maximum interstory drift, and the computed force-deflection relation.