The Earthquake Engineering Online Archive

FLUSH: a computer program for approximate 3-D analysis of soil-structure interaction problems

Lysmer, John; Udaka, Takekazu; Tsai, Chan-Feng; Seed, H. Bolton

UCB/EERC-75/30, Earthquake Engineering Research Center, University of California, Berkeley, 1975-11, 139 pages (555.6/L92/1975)

This report discusses the general principles of seismic soil-structure interaction by finite element methods and provides the theory and manual for a specific computer code, called FLUSH. This code is a further development of the complex response finite element computer program LUSH. The new program is considerably faster than LUSH, thus the name FLUSH equal to Fast LUSH and it includes a large number of new features such as transmitting boundaries, beam elements, an approximate 3-D ability, deconvolution within the program, out-of-core equation solver, new input/output features, etc., all of which make the program more efficient and versatile.

Available online: http://nisee.berkeley.edu/documents/EERC/EERC-75-30.pdf (4 MB)