IIIDAP: Interactive Interface for Dynamic Analysis Procedure

The Interactive Interface for Incremental Dynamic Analysis Procedure (IIIDAP) is a generic single degree of freedom (SDOF) analysis software for seismic evaluation of deteriorating and non-deteriorating SDOF systems. The software uses advanced deteriorating hysteretic models that have been implemented in widely used simulation platforms and can adequately capture all the important deterioration modes of a component or system. The software is able to simulate explicitly dynamic collapse of SDOF systems subjected to seismic loading. Few of IIIDAP's features are:

Explicit dynamic collapse of SDOF systems
Development of damage states given a hazard level of ground motion intensity
Development of Collapse Spectra
Uncertainty propagation from the onset of damage through collapse of SDOF systems
User defined ground motions

We currently distribute version 1.2 and can be downloaded from here. You will also need the Ground Motions Folder. For installation instructions please use the following documentation that is provided with IIIDAP. The current manual of the program can be found here.

IIIDAP is a versatile analysis tool that is currently used for educational purposes as part of a number of graduate courses at Stanford University (CEE 385: Performance-Based Earthquake Engineering, CEE 288: Earthquake Hazard and Risk Analysis) and at McGill University (CIVE 616: Nonlinear Structural Analysis for Buildings). We have also used IIIDAP as part of recent projects related to earthquake engineering practice such as NIST (2010). At the moment, IIIDAP is available for Windows machines only. A MAC version of the program is on the works.

Licence

IIIDAP is free software; you can redistribute it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 1.1.5 of the License, or (at your option) any later version.

IIIDAP is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

Selected Publications:

Lignos, D.G. (2010). “Interactive Interface for Incremental Dynamic Analysis: Theory and Example Applications Manual, Version 1.1.5”, Department of Civil Engineering and Applied Mechanics, McGill University, Montreal, Canada, September, 2010.
NIST (2010). “Applicability of nonlinear multiple-degree-of-freedom modeling for design”, U.S. Department of Commerce, National Institute of Standards and Technology (NIST GCR 10-917-9).