TLWorkstation trademark code: Version 2. 0

This document constitutes a user's manual for the computer program MFAD (Moment Foundation Analysis and Design). MFAD was derived from the earlier computer program PADLL (Pier Analysis and Design for Lateral Loads), which was developed in conjunction with the Electric Power Research Institute (EPRI) Project 1280-1 (Laterally Loaded Drilled Pier Research) and Sandia National Laboratories Contract 20-4441. PADLL was modified to produce MFAD by incorporating analysis/design capabilities into the program to consider direct embedment foundations based on the results of research conducted under EPRI Project 1280-3 (Development of a Direct Embedment Foundation Design Procedure) and Empire State Electric Energy Research Corporation (ESEERCO) Project EP85-33. Existing methodologies for design and analysis of drilled shafts and direct embedment foundations subjected to overturning moments were reviewed and critiqued, and improved theoretical models for ultimate lateral capacity and nonlinear load-deflection response were developed. These theoretical models were incorporated into a nonlinear load-deflection response were developed. These theoretical models were incorporated into a nonlinear load-deflection and ultimate capacity model, which was subsequently modified to obtain a semi-empirical model that provides a best-fit to the test results from prototype drilled shaft and direct embedment foundation tests. The computer program (MFAD) based on this semi-empirical model ismore » described. The program has geotechnical design and analysis capabilities for laterally loaded drilled shafts and direct embedment foundations embedded in multilayered soil profiles. Documentation for the development of the computer program and the prototype foundation load testing programs conducted in EPRI Projects RP 1280-1 and 1280-3 is contained in EPRI Reports EL 2197, Volumes 1 and 2, and EL-6309.« less