Performance-Based Seismic Bridge Design (2013) / Chapter Skim
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Pages 68-75
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From page 68... ...
68 CHAPTER TEN SUMMARY OF ORGANIZATION AND PROJECT-SPECIFIC CRITERIA This chapter summarizes the organization- and projectspecific criteria reviewed and discussed in chapters eight and nine. Criteria will be compared for trends, consensus, and differences.
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69 hensive summary of the data presented in this synthesis, organized by damage descriptors along the top and seismic hazard (in terms of return period) down the side.
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70 It is difficult to put all the damage descriptors and criteria together in one table without some ambiguity or inconsistencies. This is because the terminology used in various criteria and reconnaissance and laboratory work is not always consistent; nor are the statements of performance objectives.
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71 ing steel (Table 27) , compressive concrete strain (Table 28)
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72 engineers to know what performance is intended (i.e., what damage is prevented) by adherence to the strain limit.
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73 TABLE 28 COMPRESSION STRAIN LIMITS -- CONCRETE Agency Year Ground Motion Component and Location Explicit Damage State? Damage State Strain Limit (in./in.)
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74 To put strain limit data into a probabilistic PBSD format will require the use of distribution functions using a central tendency (mean or median value) and a dispersion measure, as has been discussed previously.
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75 TABLE 29 COMPRESSION AND TENSION STRAIN LIMITS -- STRUCTURAL STEEL Agency Year Ground Motion Component Explicit Damage State? Damage State Strain Limit POLA/POLB 2010/2009 50% in 50 yr (72-yr RP)
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