Replacement of major truss members under load
Citation
Asian Architect & Contractor, v.14, no.3, 1984, pp. 86-92
Abstract
The Marine Parkway Bridge in New York, New York, spans Rockaway Inlet connecting the boroughs of Brooklyn and Queens. In 1970, the boom of a crane mounted on a barge crossing beneath the bridge struck the lower chords of the main vertical lift span causing severe damage. In addition, extensive member corrosion has occurred over the years necessitating replacement of some of the vertical truss members of the approach trusses. A detailed presentation of how these repairs were made is provided since little information is available in published literature on repair and replacement of major truss members under load. It is believed that documentation of the procedures utilised will be useful to other practising engineers. The repairs to the lower chord members were accomplished by providing a temporary replacement member consisting of prestressed bars. The replacement of the vertical truss member was achieved by temporary replacement with hangers.
(1) Introduction
(2) Truss lower chord repairs
(a) Description of damage
(b) Design constraints and objectives
(c) Temporary supports
(d) Installation of temporary supports
(e) Member repairs
(3) Truss vertical member replacement
(a) Description of damage
(b) Design constraints and objectives
(c) Temporary supports
(d) Member replacement
(4) Conclusions
(5) Acknowledgements
Description
Building Type(s): Bridges
Subject
Type
Article
Format
Date
1984
Language
en