NEHRP Clearinghouse
- Title
- TLUSH: A Computer Program for the Three-Dimensional Dynamic Analysis of Earth Dams.
- File
- PB82139940.pdf
- Author(s)
- Kagawa, T.; Mejia, L. H.; Seed, H. B.; Lysmer, J.
- Source
- National Science Foundation, Washington, DC., September 1981, 118 p.
- Identifying Number(s)
- UCB/EERC-81/14
- Abstract
- Two-dimensional finite element techniques which use the complex response method and therefore permit variations in modulus and damping in different elements of a soil structure have been extended to three dimensions, with a constraint on the possible deformations of the finite element model. The present version of the computer program TLUSH constitutes a further development of these procedures and includes the following: complete freedom for the selection of the direction of the earthquake motions, complete freedom in the deformational modes of the model, a new interpolation scheme, a nodal point and element data generation routine, more efficient element stiffness generation routines and a more efficient program structure that has lower memory requirements. The program TLUSH can take into account the strong nonlinear effects characteristic of soil masses subjected to strong earthquake motions. This is achieved by a combination of the equivalent linear method and the complex response method. Typical relationships between stiffness, damping and effective shear strains for sand and clay are provided within the program. Special options that permit creation of a permanent record of both input and basic information on the complete solution, and recovery of this information for iteration and output purposes are available within the program.
- Keywords
- TLUSH computer program; Stiffness methods; Computer programs; Computer applications; Finite element analysis; Earthquake engineering; Fortran 4 programming language; Transfer functions; Soil dynamics; Earth dams; Soil properties; Fortran; Earthquakes