M.I.T. TEST SECTION INSTRUMENTATION. MASSACHUSETTS BAY TRANSPORTATION AUTHORITY, HAYMARKET-NORTH EXTENSION. ADDENDUM TO FINAL PROJECT REPORT

The finite element technique was used to develop a unique computer program for analyzing the performance of braced excavations in test sections of a cut-and-cover subway constructed by the Massachusetts Bay Transportation Authority. Finite element programs permit the analysis of previously unsolvable problems; element type, method of load application, element grid size, and input material properties are a few of the variables which determine the accuracy of simulations using this method. The report examines seven limitations and problems of the latest version of the program, called BRACE 2. A complete printout of the braced excavation analysis is provided. This report was generated as an addendum to the final report of MASS-MTD-2 in which development and application of the program is covered in greater detail.

Supplemental Notes:
- Paper copy also available from NTIS $8.00/set of 2 reports as PB-220 876-SET.
Corporate Authors:
Massachusetts Institute of Technology

Department of Civil Engineering, 77 Massachusetts Avenue
Cambridge, MA United States 02139
Publication Date: 1972-3

Media Info

Pagination: 60 p.

Subject/Index Terms

TRT Terms: Braces; Bracing; Civil engineering; Clay soils; Computer programs; Construction; Loads; Numerical analysis; Performance evaluations; Rapid transit; Soil mechanics; Stability (Mechanics); Subways; Tunneling; Tunnels
Identifier Terms: U.S. Urban Mass Transportation Administration
Geographic Terms: Massachusetts
Old TRIS Terms: Brace computer program; Clays soils; Subway railway
Subject Areas: Bridges and other structures; Construction; Geotechnology; Public Transportation;

Filing Info

Accession Number: 00047278
Record Type: Publication
Source Agency: National Technical Information Service
Report/Paper Numbers: R72-33-Add
Contract Numbers: DOT-H-753
Files: NTIS, TRIS
Created Date: Sep 27 1973 12:00AM