A Modular Steel Freeway Bridge: Design Concept and Earthquake Resistance

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Science  14 Apr 1995:
Vol. 268, Issue 5208, pp. 279-281
DOI: 10.1126/science.268.5208.279


A modular multilane steel freeway bridge has been constructed from surplus railroad flatcar decks. It can be erected on-site in a few days' time. It has been built and static-load tested for emergency freeway bridge repair. This inexpensive modular bridge may also have broad application around the world for low-cost bridges in areas where funds are limited. On the basis of static-load testing performed by the California Department of Transportation and computer dynamic analysis, this simple modular-design concept has the potential of providing a strong bridge that can withstand the severe aftershocks expected immediately after a major earthquake.