Computer Programs

NESC9958 CREEP-80.

NESC9958 CREEP-80.

CREEP-80, Creep Analysis of Concrete Structure by Finite Element Method

NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM OR FUNCTION, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHORS, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM: CREEP-80.

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2. COMPUTERS

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Program name	Package id	Status	Status date
CREEP-80	NESC9958/01	Tested	02-SEP-1988

Machines used:

Package ID	Orig. computer	Test computer
NESC9958/01	IBM 3033	IBM 3090

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3. DESCRIPTION OF PROGRAM OR FUNCTION

CREEP80 is a finite element program for the analysis of creep effects in concrete structures. The creep law is linear, aging is accounted for, and temperature effects on the creep rate, as well as the rate of aging, are considered. Material properties can be specified either as empirical creep test data or as the double power law for creep. The program can automatically set up the creep parameters from partial empirical information.

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4. METHOD OF SOLUTION

The program uses a rate-type creep law based on expanding the relaxation function in Dirichlet series.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The program is intended for use with nuclear axisymmetric concrete structures with no cracking. Temperature variations are limited to under 80 degrees C.

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6. TYPICAL RUNNING TIME:

NESC9958/01

The test case included in this package was run by NEA-DB on an IBM 3090 computer. Compile, link, and go required about 3 seconds of CPU time.

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7. UNUSUAL FEATURES OF THE PROGRAM:

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8. RELATED AND AUXILIARY PROGRAMS

CREEP80 can be incorporated into the general finite element code NONSAP developed at the University of California at Berkeley. CREEP80 uses routines from the proprietary International Mathematical and Statistical Library (IMSL) for matrix solution and error message printing; these routines are not included.

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9. STATUS

Package ID	Status date	Status
NESC9958/01	02-SEP-1988	Tested at NEADB

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10. REFERENCES

- K.J. Bathe, E.L. Wilson, and R.H. Iding
  NONSAP A Structural Analysis Program for Static and Dynamic
  Response of Nonlinear Systems,
  University of California at Berkeley report UCSEM ur-3, 1974.

NESC9958/01, included references:

-Z.P. Bazant and E.C. Rossow :
  CREEP80-Axisymmetric Finite Element Program for CREEP Analysis of
  Aging Concrete Structures at Variable Temperature
  ORNL/GCR-81/15 (August 1981)

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11. MACHINE REQUIREMENTS: 300K bytes.

NESC9958/01

To run the test case on an IBM 3090, 340K bytes of main storage are required.

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
NESC9958/01	FORTRAN-IV

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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED: VMS/JES2.

NESC9958/01

MVS/XA with VS FORTRAN level 2.1.1 compiler (IBM 3090).

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

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15. NAME AND ESTABLISHMENT OF AUTHORS

          J.R. Dougan
          Oak Ridge National Laboratory
          P.O. Box Y, Oak Ridge, Tennessee 37830

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16. MATERIAL AVAILABLE

NESC9958/01

File name	File description	Records
NESC9958_01.001	INFORMATION FILE	152
NESC9958_01.002	CREEP80 FORTRAN SOURCE	2943
NESC9958_01.003	SLATEC REPLACEMENT FOR IMSL ROUTINE LEQT1F	2115
NESC9958_01.004	JCL - COMPILE, LINK TO LIBRARY STEP	136
NESC9958_01.005	JCL - TEST CASE RUN	57
NESC9958_01.006	TEST CASE INPUT	35
NESC9958_01.007	TEST CASE OUTPUT	929

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17. CATEGORIES

I. Deformation and Stress Distributions, Structural Analysis and Engineering Design Studies

Keywords: concretes, creep, finite element method, stresses, temperature.