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The Golden Gate Bridge is a major tourist attraction in San Francisco, as well as a vital transportation infrastructure, boasting traffic volume of some 40 million vehicles per year.
Obayashi, together with another firm, is part of a joint venture responsible for seismic retrofit construction on the south anchorage and its approach sections of the bridge.
The joint venture has added and replaced steel members and concrete structures, added extra concrete piles, and installed seismic isolator bearings and Energy Dissipation Devices, all without stopping the flow of traffic. With these changes, the bridge can now withstand even the largest-scale earthquakes ever recorded in the region.
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