Hysteretic Model for Corroded Rectangular Reinforced Concrete Bridge Column Under Seismic Loading

doi:10.1007/s12204-021-2282-8

Abstract

Abstract: Additional hysteretic experiments for corroded rectangular reinforced concrete (RC) columns withan axial load ratio of 0.27 were implemented. A quasi-static cyclic lateral loading with constant axial force wassubjected to tests. Herein, a modified ductility factor model for corroded RC column is developed on the basisof the previous work and additional experiments. The model involves the influence of both the corrosion ratioof longitudinal rebar and the axial load ratio. A four-linear envelope curve model concerning lateral load anddisplacement is proposed in a combination of determination rules of the peak point and the failure strength point.The hysteretic model of corroded RC columns is developed by considering both degraded unloading stiffness andreloading stiffness on the history peak point. The hysteretic model can predict the residual life of corroded RCcolumns under seismic loading.

Key words: hysteretic model, reinforced concrete (RC) column, rebar, corrosion, seismic loading, ductility factor,envelope curve

CLC Number:

TU 375.3

YANG Shuyan ∗ (杨淑雁), SONG Xiaobing (宋晓冰), JIA Hongxue (贾红学),CHEN Xi (陈溪), LIU Xila (刘西拉). Hysteretic Model for Corroded Rectangular Reinforced Concrete Bridge Column Under Seismic Loading[J]. J Shanghai Jiaotong Univ Sci, 2021, 26(6): 794-803.

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