Abstract
AbstractGiven the increasing use of nonlinear analysis in earthquake resistant design via performance‐based design, and ongoing research in simplified nonlinear methods, a software tool was developed for use in the teaching of nonlinear as well as linear structural dynamics. The program caters for single‐degree‐of‐freedom (SDOF) nonlinear systems and emphasizes degrading response as in‐cycle strength degradation, progressive cycle strength degradation, general stiffness degradation, and pinching degradation, or combinations of these, under earthquake ground motions. This is achieved using the smoothly varying endochronic plasticity Da hysteresis model. Utilizing numerical integration, the program also provides approximate solutions for many problems from SDOF linear dynamics such as free undamped or damped vibration, and forced periodic or non‐periodic damped or undamped vibration. As such, the VB6 program is named ENGLTHA—Earthquake Nonlinear and General Linear Time History Analysis, and also calculates elastic and inelastic displacement and acceleration response spectra. This article describes ENGLTHA and how it can be used, via a set of nine experiments, for teaching structural dynamics as a thread trough several courses spanning from the undergraduate to postgraduate levels. © 2009 Wiley Periodicals, Inc. Comput Appl Eng Educ 19: 97–106, 2011
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