ASIRES: Seismic response analysis code for framed structures using ASI-Gauss technique
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ASIRES is a seismic response analysis code for framed structures using the ASI-Gauss technique, which is developed in Isobe Lab., University of Tsukuba. Memory use and computational cost is minimized since it subdivides one structural member with only two linear Timoshenko beam elements. Highly accurate solutions and their convergencies are guaranteed. Seismic response problems for elastic/elasto-plastic, infinitesimal/finite deformation, truss/rahmen structures can be analyzed. Total Lagrangian Formulation (T.L.F.) and Updated Lagrangian Formulation (U.L.F.) are both implemented as nonlinear incremental theories. Member fracture and elemental contact are not considered. Please read user's manual before operation.

Download file ・・・ Compressed file 1,192KB (unpack after download)

Files compressed in
asires_v2_1.exe ・・・Numerical code execution file (ASIRES Ver.2.1)
input.txt ・・・Input data file
seismic.dat ・・・Seismic wave data file
output.txt,post.out,eqs.out ・・・Output data files
manual_e.pdf ・・・User's manual
Graphic.exe ・・・Graphic software execution file (using post.out, eqs.out as input files)
color_range.txt ・・・Color range file for graphic software
glut32.dll ・・・Dynamic library for graphic software
manual(Graphic.exe)_e.txt ・・・User's manual for graphic software

*Prof. Isobe and his collaborators have no obligation of whatsoever against the results of using the ASIRES code.
The numerical code and user's manuals are to be revised without notice.

2007.10.26 revised: Error output function is installed. Handling of errors are added in the user's manual. (Ver.1.10)
2008.2.14 revised: Input function for torsional coefficient is added. Modified for various compilers. (Ver.1.12)
2008.9.4 revised: Precision option is added. (Ver.1.20)
2009.9.29 revised: Calculation routine for seismic velocity and displacement is revised. (Ver.2.00)
2017.3.23 revised: Changed number of iterations, and made the executive file using updated compiler. (Ver.2.1)
2017.6.18 revised: Graphic software "iGraphic.exe" is added.

2020.6.10: The source code is now open for free download.

ASIRES Ver.2.1 download (compressed file 1.6MB) 

Source code download (compressed file 15KB) *Theories are shown in "Progressive Collapse Analysis of Structures: Numerical Codes and Applications, Elsevier, eBook ISBN: 9780128130421, Paperback ISBN: 9780128129753, 2017". Elsevier

ASI-Gauss technique reference site: Seismic DamageSpace Debris ImpactBlast DemolitionAircraft ImpactProgressive Collapse