|
|
|
Title: SHEAR STRENGTH OF DOUGLAS FIR TIMBER BRIDGE TIES
Accession Number: 00781528
Record Type: Component
Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Find a library where document is available Abstract: Tests on 480 240- x 290-mm (nominal 10- x 12-in.) bridge ties, both old and new, indicate that the characteristic strengths for shear given in most North American codes of practice seem to be unduly conservative. As a result of this test program, it is suggested that design requirements for shear in timber codes of practice be revised to reflect more correctly the structural behavior of the material, using concepts such as the weakest link principle and fracture mechanics considerations. The test program also clearly demonstrates that in many cases the allowable shear capacity can be doubled by using an overhang equal to the beam depth. The research indicates a savings on paper of over $200 million (Canadian dollars) for the Canadian National Railway Company if the recommendations presented in this research are followed instead of those in the current Canadian Standards Association design code (086.1, 1994), the American Railway Engineering and Maintenance of Way Association's manual of recommended practice, or other typical North American codes of practice.
Supplemental Notes: This paper appears in Transportation Research Record No. 1691, Research Issues in Intercity Rail Passenger Systems and Railroad Track Structure Design.
Language: English
Corporate Authors: Transportation Research Board 500 Fifth Street, NW Authors: Madsen, BSweeney, RAPPagination: p. 44-56
Publication Date: 1999
Serial: ISBN: 0309071194
Features: Figures
(10)
; References
(10)
; Tables
(2)
TRT Terms: Geographic Terms: Subject Areas: Finance; Geotechnology; Highways; Materials; Railroads; Research
Files: TRIS, TRB, ATRI
Created Date: Jan 24 2000 12:00AM
More Articles from this Serial Issue:
|
