NEHRP Clearinghouse
- Title
- MASH - A Computer Program for the Non-Linear Analysis of Vertically Propagating Shear Waves in Horizontally Layered Deposits.
- File
- PB293101.pdf
- Author(s)
- Martin, P. P.; Seed, H. B.
- Source
- National Science Foundation, Washington, DC., October 1978, 96 p.
- Identifying Number(s)
- UCB/EERC-78/23
- Abstract
- The computer program MASH is designed to analyze the dynamic response of a deposit of horizontal soil layers subjected to earthquake excitation. The deposit is discretized into a series of one-dimensional constant strain elements and the equations of motion are integrated with respect to time by the cubic inertia method. The soil material may be either visco-elastic or non-linear and modelled into the Davidenkov system of soil property expressions. The program may be used in conjunction with the program APOLLO to perform effective stress response analyses of soil deposits in which pore pressures are generated and dissipated during and following the period of earthquake shaking. An example of this type of analysis, incorporating non-linear soil behavior and pore pressure effects is presented in the report.
- Keywords
- MASH computer program; User needs; Mathematical models; Operators (Mathematics); Dynamic response; Earthquake engineering; Computer programming; Pore pressure; Soil dynamics; Nonlinear systems; Earthquakes