Performance-Based Seismic Bridge Design (2013) / Chapter Skim
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Pages 58-63
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From page 58... ...
58 CHAPTER EIGHT ORGANIZATION-SPECIFIC CRITERIA FOR BRIDGES This chapter reviews example seismic design performance criteria for several DOTs, plus FHWA's seismic retrofit criteria and those of several international agencies responsible for development of earthquake design criteria. The summaries focus on the stated performance and seismic hazard aspects of the project and not on the details of the analysis and design to achieve the stated performance goals.
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From page 59... ...
59 – 1,000-year event with deterministic limits, no collapse – Limits maximum concrete, mild steel, and prestressing steel strains, which are the same as the SGS. Ordinary nonstandard and important bridges are designed according to project-specific criteria based on the procedures outlined in the Memo to Designers 20-11 (Caltrans 1999)
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60 (2008) set of criteria is one of the more complete performance-based criteria available today.
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61 TABLE 19 DISPLACEMENT PERFORMANCE LIMITS (SCDOT 2008) Bridge System Design Earthquake Operational Classification (OC)
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62 its seismic design specifications in 1996 (JRA 1996)
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From page 63... ...
63 a total permanent displacement greater than 15 cm, and such cases proved quite difficult to repair and to provide adequate new bearing support lengths. Accordingly, the residual drift limit was set at 1/100 or 1%.
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