NEHRP Clearinghouse

Summary on Pseudodynamic Testing.
Seible, F.; LaRovere, H. L.
National Science Foundation, Washington, DC., February 1987, 53 p.
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The analytical basis for interactive or on-line experimental testing under simulated dynamic loads, often referred to as Pseudodynamic Testing, is summarized in the report and implemented in a computer code PSDYN. The code is based on the CALSD series of structural analysis programs and incorporates a set of commands allowing not only the computation of the displacement response in a Pseudodynamic Method but also linear dynamic analysis of structures using step-by-step methods, solution of eigenvalue problems, and general matrix manipulations. PSDYN is written in FORTRAN77 with a free-field type of input and can be used either in batch or interactive mode. The program utilizes runtime libraries interconnected by a common database, which allows applications on large mainframes as well as on microcomputer systems. Examples described in the report have been run in a VAX/VMS environment and on the CRAY X-MP. Chapter 2 describes briefly the Pseudodynamic Test Method and summarizes the background necessary to utilize it. A complete user's manual for all the PSDYN commands is given in Chapter 3. In Chapter 4 two examples of a three Degrees of Freedom (DOF) structure subjected to a blast loading and to the El Centro 1940 (NS) earthquake are shown.
Computer programs; Earthquake engineering; Dynamic tests; Test methods; PSDYN computer program; Structural vibration; Matrices (Mathematics); User manuals (Computer programs); Vibration damping; Computerized simulation; Mathematical models; Dynamic structural analysis