The Preservation And Upgrading Of
Historic Metal Truss Bridges And
The Load Carrying Capacity
Author(s)
J. B. Kim
Abstract
With respect to historic metal truss bridges the most frequently asked questions
are:
• How can we preserve our historically important bridges before they
collapse from even just self-weight alone?
• How much longer can these bridges be preserved?
• How economically can these bridges be upgraded to carry modern
traffic?
• How safely can these bridges be rehabilitated?
It is well recognized that conventional repair and rehabilitation procedures
cannot preserve these bridges for an extended period of time, even for greatly
reduced weight limits. Since these bridges were constructed for much lighter
loads, they are not able to carry today’s traffic loads, even with the total
replacement of every member and connection. Thus, conventionally rehabilitated
historic bridges are sometimes moved to remote locations such as parks. Of
course, this is not the most desired option because of costs and practicality.
It would be ideal to preserve more historically important bridges by
strengthening them so that they can carry modern traffic at their present locations
for extended periods. One way would be to preserve the original architecture but
with discrete elements added in such a manner that these historic bridges can
continue to carry modern traffic for a duration equivalent to that of a new bridge.
In this way, the original architecture would be readily recognizable for greater
appreciation of our engineering and cultural heritage.
Keywords: bridge, metal truss, preservation, safety, load carrying capacity and
upgrade.
Keywords
bridge, metal truss, preservation, safety, load carrying capacity and
upgrade.
Related Book
Other papers in this volume
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