DAMAGE ESTIMATION OF A SELF-CENTERING PRECASTCONCRETE BRIDGE PIER SYSTEM USING A PERFORMANCE-BASEDASSESSMENT METHODOLOGY

摘要

A precast segmental concrete bridge pier system is being investigated for use in seismic regions. Thernproposed system uses unbonded post-tensioning (UBPT) to join the precast segments and has the optionrnof using a high performance fiber-reinforced cement-based composite (HPRFCC) in the precast segmentsrnat potential plastic hinging regions. The UBPT is expected to facilitate self-centering of the columns (I.e.rnCause minimal residual displacements) after cyclic loading and allow only a low amount of hystereticrnenergy dissipation. The HPFRCC material is expected to add hysteretic energy dissipation and damagerntolerance to the system. Large-scale experiments on columns using the proposed system were conductedrnand are briefly reviewed. An overview of the performance-based framework developed by the PacificrnEarthquake Engineering Research Center is presented, and an assessment of the potential damage in thernproposed system using the performance-based methodology is presented.