ASIFEM3: Finite element code for framed structures using ASI technique (Cubic beam element version)
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ASIFEM3 is a finite element code for framed structures using the ASI technique (cubic beam element version), which is proposed in Toi Lab., University of Tokyo, developed and modified in Isobe Lab., University of Tsukuba. Memory use and computational cost is minimized since it subdivides one structural member with only one Bernoulli-Euler beam element (cubic beam element). Highly accurate solutions and their convergencies are guaranteed. Basic loading problems for elastic/elasto-plastic, static/dynamic, 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 691KB (unpack after download)

Files compressed in
asifem3_v1_3.exe ・・・Numerical code execution file (ASIFEM3 Ver.1.3)
input3.txt ・・・Input data file
output.txt,post.out,eqs.out ・・・Output data files
manual3_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 ASIFEM3 code.
The numerical code and user's manuals are to be revised without notice.

2008.2.14 revised: Input function for torsional coefficient is added. Modified for various compilers. (Ver.1.10)
2008.9.4 revised: Precision option is added. (Ver.1.20)
2017.3.23 revised: Changed number of iterations, and made the executive file using updated compiler. (Ver.1.3)

2017.6.18 revised: Graphic software "iGraphic.exe" is added.
2020.6.10: The source code is now open for free download.

ASIFEM3 Ver.1.3 download (compressed file 1.1MB) 

Source code download (compressed file 14KB) *Theories are shown in "Progressive Collapse Analysis of Structures: Numerical Codes and Applications, Elsevier, eBook ISBN: 9780128130421, Paperback ISBN: 9780128129753, 2017". Elsevier

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