Innovative Solutions to Seismic Design Challenges for the SFOBB I-80 WB Ramps at Yerba Buena Island
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Bibliographic Details
| Author(s): |
Hohsing Lee
(Regional Technical Director, AECOM, Sacramento, CA, US)
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Symposium: Engineering the Future, Vancouver, Canada, 21-23 September 2017 | ||||
| Published in: | IABSE Symposium Vancouver 2017 | ||||
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| Page(s): | 120-127 | ||||
| Total no. of pages: | 8 | ||||
| Year: | 2017 | ||||
| DOI: | 10.2749/vancouver.2017.0120 | ||||
| Abstract: |
The I-80 Westbound (WB) ramps at Yerba Buena Island (YBI) are comprised of five complex curved structures that were designed to provide access to the new east-span of San Francesco Bay Bridge (SFOBB). The construction contract of the project was awarded in late 2013. Yerba Buena Island is located in very high seismic zone within the San Francisco Bay. Two major earthquake sources are the Hayward fault at about 12 km east of the project site and the San Andrea faults at 18 km west of the project site. The terrain at the bridge site highly varies with the ground surface elevations, which make seismic design very challenging. This paper discusses a number of innovative design solutions; foundation, superstructure, seismic deck joints, in-span hinges, spherical bearings, and etc. to deal with the stringent seismic design challenges. |
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| Keywords: |
post-tensioning steel-box SFOBB concrete-box GFRC seismic joints
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