Structural Dynamics In Earthquake-Resistant Design

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Abstract
Research efforts utilizing high-speed digital computers and electric analogs have indicated vast differences between earthquake shear values arrived at by design and adherence to codes and for structures' actual earthquake behavior. This paper attempts to reconcile these differences, with the aid of comprehensive structural and dynamic analyses and research efforts on a traditional filler-wall type office building and a modern glass-wall structure. Included are values for strengths, rigidities, and inelastic energy-absorption for the traditional building under various distortions up to failure. The results of a comprehensive series of analog tests for the modern 20-story structure, using four complete earthquake records with sixteen various systems of damping and rigidity values are also included. Certain inconsistencies and pitfalls in present-day design practice are demonstrated and new considerations are suggested for resisting the occasional but extreme energy releases of nature that are involved in earthquakes.

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