205 Seismic Performance Criteria 2051 Atcmceer Guidelines

Table 20.1 gives the seismic performance criteria for highway bridges specified in the proposed ATC/MCEER Guidelines [37]. As a minimum, a bridge shall be designed for the life safety level of kr

Longitudinal

Longitudinal

Abutment resistance not required as part of ERS

Plastic hinges in inspectable locations or elastic design of columns

Knock-off backwalls permissible

Transverse Transverse

Abutment not required in ERS, breakaway shear keys permissible

Plastic hinges in inspectable locations or elastic design of columns

Transverse or longitudinal

Abutment resistance required, but abutment able to resist 3% in 75-year earthquake elastically and passive soil pressure in longitudinal direction is less than 0.70 X presumptive value given in Article 7.5.2 in Guidelines

Abutment not required as part of ERS

Isolation bearings accommodate full displacement

Longitudinal and transverse

Isolation bearings with significant energy dissipation capacity or energy dissipators are used at the abutment to limit overall displacements

Plastic hinges in inspectable locations or elastic design of columns

Longitudinal

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