Bridge (graph theory)

Earthquake engineering

Displacement (psychology)

Physics

Internal medicine

Engineering

Dissipation

Earthquake resistant structures

Bent molecular geometry

Psychology

Pier

Composite material

Seismic analysis

Geotechnical engineering

Materials science

Resilience (materials science)

Psychotherapist

Structural engineering

Medicine

Thermodynamics

Engineering Structures

Seismic resilient structures with low structural damage and self-centering behavior after an earthquake are focus issues of current earthquake engineering. Unbonded pretensioned rocking columns offer advantages for accelerated bridge construction in seismic regions, which utilize column-uplifting mechanisms, high strength post-tensioning, and replaceable energy dissipation devices to enhance seismic performance and resilience. The experiment of three 1:3 scale unbonded, post-tensioned rocking bridge bents with different types of external replaceable energy dissipation devices subjected to quasi-static loading protocols, were carried out according to practical engineering demand in high-intensity earthquake regions. An improved analytical model was proposed for predicting the force-displacement relationship of the post-tensioned rocking bridge bent systems considering the neutral axis depth. Minimal physical damage was observed for the post-tensioned rocking bridge bent systems, which exhibit good energy dissipation and self-centering behavior. Especially, the external replaceable buckling-restrained plates dissipaters can be easily replaced if severely damaged subjected to higher than expected ground motions. The satisfactory analytical and experimental comparisons are presented as a validation of the reliability for the high-performance seismic-resistant bridge bent systems and the modelling techniques in this study.

Hysteretic behavior investigation of self-centering double-column rocking piers for seismic resilience