Seismic Analysis of Structures With Coulomb Friction

[+] Author and Article Information
V. N. Shah

EG&G Idaho, Inc., Idaho Falls, Idaho 83415

C. B. Gilmore

Westinghouse Electric Corporation, Pittsburgh, Pa. 15230

J. Pressure Vessel Technol 105(2), 171-178 (May 01, 1983) (8 pages) doi:10.1115/1.3264260 History: Received August 03, 1982; Revised February 17, 1983; Online November 05, 2009


A modal superposition method for the dynamic analysis of a structure with Coulomb friction is presented. The finite element method is used to derive the equations of motion, and the nonlinearities due to friction are represented by pseudo-force vector. A structure standing freely on the ground may slide during a seismic event. The relative displacement response may be divided into two parts: elastic deformation and rigid body motion. The presence of rigid body motion necessitates the inclusion of the higher modes in the transient analysis. Three single degree-of-freedom problems are solved to verify this method. In a fourth problem, the dynamic response of a platform standing freely on the ground is analyzed during a seismic event.

Copyright © 1983 by ASME
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