Ask a Scientist [topic: Bay Bridge Science] May 11, 2010

THIS MONTH'S TOPIC: Science of the Bay Bridge

When the Bay Bridge was built back in 1933 it was heralded as a man-made wonder — the largest and most expensive bridge of its time. But not much was known about earthquakes back then. Even if you didn't live in the Bay Area in 1989, you probably recall the horrific images of the collapsed upper deck after the Loma Prieta earthquake. To help prevent such a scene from recurring, the western span of the bridge was retroffited; and the more vulnerable eastern span needed to be completely replaced. The awesome engineering of the new span hides ingenious seismic innovations within its simple-looking design. Learn about this marvel of modern engineering, and discuss the recent incidents that have raised public concern and curiosity about this colossal and critical project. Tonight's event is presented in collaboration with KQED's QUEST Science and Environment Series. We'll start the evening by watching QUEST's "The New Bay Bridge" video.

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