Accession Number:

ADA139140

Title:

Load Tests of a through Truss Bridge before and after the Installation of an Arch-Superposition Scheme.

Descriptive Note:

Master's thesis,

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s):

Report Date:

1983-08-01

Pagination or Media Count:

91.0

Abstract:

Because so many pinned and riveted truss bridges currently are classified as structurally deficient, a need to develop an economical, practical alternative to bridge replacement exists. Rehabilitation by an arch-superposition scheme can effectively reduce truss member stresses and increase the bridge load capacity. This was verified by load tests conducted both before and after the installation of the arch-superposition scheme to Northumberland Country bridge number 50. The results showed that truss member stresses and deflections can be reduced at least 50 by the scheme which is approximately one-seventh the cost of bridge replacement. Bridge number 50 has been upgraded from a six to a 20 ton inventory rating. The theory, economics, and construction feasibility of the arch-superposition scheme have been verified.

Subject Categories:

  • Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE