Overall Conceptual Seismic Design and Local Seismic Capacity Design for Components of Bridges - Structural Seismic Design Optimization and Earthquake Engineering - page 300

Figure 31. Hysteretic curves

damping ratio is reduced by 41.7%. The pinching
effects of RC models are more obvious, while the
hysteretic loops are plumper for models strength-
ened with SPPs. Comparisons between the ex-
perimental and numerical responses show that the
numerical results agree with the experimental
trends well.

important design parameters are determined by
theoretical analyses and experiment testing. The
application of the new bearing in a girder-arch
composite bridge shows that the relative seismic
displacements between the girder and piers are
reduced significantly and the seismic forces at
almost all the pier bottoms are also reduced when
the new bearing replaces the original frictional
one on the fixed pier.
Based on the proposed nonlinear material
constitutive model of SFRC, the seismic capaci-
ties of single-column bridge piers wholly and
locally reinforced with SFRC are studied by the
pushover method. Analysis results show that the
bending strength and the curvature ductility of
the piers are improved if the SFRC replaces the
CRC. The improvement extent of the ductility is

Solutions and Recommendations

To realize more economical, applicable and valid
seismic design of bridges, some local element
seismic design strategies are presented to improve
the seismic capacities for bridges. Considering the
disadvantages of some typical isolation devices,
a new cable sliding friction aseismic bearing
is invented. Its performance criteria and some