Abstract

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Title:: Review of Seismic Performance of Prestressed Segmental Precast and Assembled Piers

Author(s):: WANG Zhen; WANG Jing-quan; Key Laboratory of C & PC Structures of Ministry of Education, Southeast University

Keywords:: pier; precast segment; assembling; prestressed concrete; self-centering; energy dissipation; seismic performance

Abstract:: In order to promote the application of prestressed segmental precast and assembled piers in high seismicity areas bridge engineering, the relevant researches were summarized systematically from four aspects, including self-centering, energy dissipation, damage tolerance of bottom segment and performancebased seismic design, and the existing problems and future research directions were pointed out. The results show that unbonded prestressed tendons can provide better self-centering, and the residual deformation of pier is very small after the earthquake. Compared with the cast-in-place pier, the prestressed segmental precast and assembled pier is poor in energy dissipation capacity and need to set up a special energy dissipation device, in which the external energy dissipation device can be replaced after the earthquake and is worth popularizing. The robust performance of prestressed segmental precast and assembled piers is poor, which should be paid attention to improve the allowable damage ability of the bottom section. The performance-based seismic design of prestressed segmental precast and assembled piers has just started and needs further development.