ILLICON is a fatally flawed code that fails verification with closed-form solutions
ILLICON is a fatally flawed code that fails verification with closed-form solutions
(OP)
thread274-434534: Use of computer programs to predict settlement - there are several bad programs out there thread274-434534: Use of computer programs to predict settlement - there are several bad programs out there
for the N.A.I.C.M. program for new international airport in Mexico City, Dr. McNulty proved that both of the design computer programs to compute settlement by the Dutch Contractor TASANA (D-Settle) and ILLICON by Dr. G. Mesri of the University of Illinois, had catastrophic errors that produced spurious and unsound design solutions. In particular, the Mesri ILLICON code failed classic verifications with:
1. Terzaghi's closed-form solution for instantaneous loading with constant properties;
2. Hamilton Gray's (1945) closed-form solutions for instantaneous loading on a two-layer constant properties solution.
3. R. Baron's (1948) closed-form solutions for radial flow.
4. SD5 (finite difference) by Roy E. Olson of The University of Texas at Austin.
All the papers thus produced by Mesri and company are therefore utterly suspect in their entirety. For those who are interested in the finite element code that i wrote that is verified with all these solutions, see the attached pdf that describes the basis of this FE code.
for the N.A.I.C.M. program for new international airport in Mexico City, Dr. McNulty proved that both of the design computer programs to compute settlement by the Dutch Contractor TASANA (D-Settle) and ILLICON by Dr. G. Mesri of the University of Illinois, had catastrophic errors that produced spurious and unsound design solutions. In particular, the Mesri ILLICON code failed classic verifications with:
1. Terzaghi's closed-form solution for instantaneous loading with constant properties;
2. Hamilton Gray's (1945) closed-form solutions for instantaneous loading on a two-layer constant properties solution.
3. R. Baron's (1948) closed-form solutions for radial flow.
4. SD5 (finite difference) by Roy E. Olson of The University of Texas at Austin.
All the papers thus produced by Mesri and company are therefore utterly suspect in their entirety. For those who are interested in the finite element code that i wrote that is verified with all these solutions, see the attached pdf that describes the basis of this FE code.
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