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THE NORTHRIDGE EARTHQUAKE: PROGRESS MADE, LESSONS LEARNED IN SEISMIC-RESISTANT BRIDGE DESIGN.
| 题名： | THE NORTHRIDGE EARTHQUAKE: PROGRESS MADE, LESSONS LEARNED IN SEISMIC-RESISTANT BRIDGE DESIGN. |
| 作者： | Cooper-JD; Friedland-IM; Buckle-IG; Nimis-RB; McMullin-Bobb-N |
| 关键词： | BRIDGE-DESIGN; SEISMIC-DESIGN; SEISMIC-RESPONSE; HIGHWAY-SYSTEMS; MITIGATION-; EARTHQUAKE-RESISTANT-DESIGN; EARTHQUAKE-RESISTANT-STRUCTURES |
| 摘要： | The Federal Highway Administration (FHWA) conducts and supports extensive research to identify new technologies that will mitigate the effects of natural hazards on the Nation's transportation system. In this article, the authors review how roads and highways have been better built or improved through new technology and retrofitting, that is, strengthening old structures. The January 1994 Northridge Earthquake shows, in particular, the vulnerability of bridges during seismic activity. To improve the seismic resistance of highway bridges, two approaches are generally used. The first approach is to update design guidelines as knowledge is gained about the response of specialized transportation structures to seismic activity. The new guidelines are applied to new construction. The second approach is to identify those structures important to the network, which are susceptible to significant damage or collapse, and then retrofit them to enhance their response to seismic activity. The authors provide observations about the performance of bridges in the Northridge Earthquake, reporting that of 2,000 bridges, 6 failed and 4 were badly damaged. Although the failure rate was low, the damaged or failed bridges caused considerable hardship for the traveling public. The authors also provide recommendations that resulted from the Northridge Earthquake as well as recommendations for new design and existing construction from past experiences. FHWA currently operates a Seismic Research Program, which is conducted by the National Center for Earthquake Engineering Research. |
| 总页数： | Public Roads. 1994. Summer 58(1) pp26-36 (Phots., 6 Ref.) |
| 报告类型： | 科技报告 |
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