Abstract

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Title:: Experiment on Seismic Behavior of Precast Segmental Concrete Bridge Piers Under Quasi Static Cyclic Loading

Author(s):: BU Zhan-Yu; WU Wei-ye; Faculty of Architectural, Civil Engineering and Environment, Ningbo University

Keywords:: precast segmental concrete bridge pier; quasi static; cyclic loading; seismic behavior

Abstract:: In order to study the difference of seismic behavior of precast segmental bridge piers and integral cast insitu bridge piers, three 1∶3.5 scale specimens were fabricated according to the urban viaduct bridge practice. The integral cast insitu and unbonded prestress precast segmental bridge pier specimens were used for quasi static cyclic loading test. The seismic behavior differences of precast segmental bridge pier and integral cast insitu bridge pier were investigated in five aspects through imposing cyclic displacement on the column top. The test results were also compared with fiber model calculation results. The results show that the unbonded prestressing precast segmental concrete piers have minor damage, lower energy dissipation, little residual displacement, and are fitted for low earthquake intensity area. The unbonded prestressing precast segmental concrete piers with energy dissipation bars show obvious concrete crush, higher energy dissipation, relatively lower residual displacement compared with monolithic reinforced steel concrete piers, and are fitted for moderate to high earthquake intensity area.