Study on deformation-based seismic performance of non-uniform corroded reinforcement concrete columns

被引：0
|
作者：
Chen S. [1 ,2 ]
Jiang H. [1 ,2 ]
机构：
[1] Department of Disaster Mitigation for Structures, Tongji University, Shanghai
[2] State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai
来源：
Tumu Gongcheng Xuebao/China Civil Engineering Journal | 2022年 / 55卷
关键词：
deformation-based performance index; FEM; non-uniform corrosion; reinforcement concrete column; seismic performance;
D O I：
10.15951/j.tmgcxb.2022.s1.0225
中图分类号：
学科分类号：
摘要：
To study the effects of non-uniform corrosion on the seismic performance of reinforcement concrete (RC) columns, the finite element models of 660 columns corroded by chloride were established after the accuracy of the numerical analysis method was validated. The effects of corrosion ratio, axial compression ratio, stirrup ratio and nonuniform corrosion characteristic value on the seismic performance of corroded RC columns were analyzed. Based on the definition of limit state of corroded RC columns in this paper, plastic rotation is selected as the deformation performance index the limit ultimate plastic rotation of corroded RC columns is obtained by taking plastic Angle as deformation performance index, and the statistical characteristic values of plastic rotation angle obtained from the numerical results. When the average corrosion ratio is low, the deformation performance of corroded RC columns is similar to that of undamaged component. With the increase of the average corrosion ratio, the deformation performance of the RC column degrades significantly. With the increase of the non-uniform corrosion characteristic value, the deformation capacity of the RC column decreases gradually. With the increase of axial compression ratio, the deformation capacity of RC column decreases. The influence of the non-uniform corrosion characteristic value is more obvious for the RC columns with smaller axial compression ratio. In order to correctly evaluate the seismic performance of corroded columns, the non-uniformity of corroded columns should be considered. © 2022 Editorial Office of China Civil Engineering Journal. All rights reserved.
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页码：1 / 8
页数：7
相关论文
共 10 条
  • [1] Chung L, Jay Kim J H, Yi S T., Bond strength prediction for reinforced concrete members with highly corroded reinforcing bars, Cement and Concrete Composites, 30, 7, pp. 603-611, (2008)
  • [2] Parulekar Y M, Dutta D, Thodetti N, Et al., Performance assessment of corroded reinforced concrete structure considering bond deterioration, Journal of Performance of Constructed Facilities, 34, 2, (2020)
  • [3] Radhi M S, Gorgis I N, Hassan M S., Analytical analysis of design-oriented models for forecasting the performance of CFRP-confined corrosion-affected concrete columns, Construction and Building Materials, 313, (2021)
  • [4] Jia J, Zhao L, Wu S, Et al., Experimental investigation on the seismic performance of low-level corroded and retrofitted reinforced concrete bridge columns with CFRP fabrit [J], Engineering Structures, 209, (2020)
  • [5] Li Q, Huang L, Ye H, Et al., Mechanical degradation of reinforced concrete columns corroded under sustained loads, International Journal of Civil Engineering, 18, 8, pp. 883-901, (2020)
  • [6] Li D, Wei R, Xing F, Et al., Influence of non-uniform corrosion of steel bars on the seismic behavior of reinforced concrete columns, Construction and Building Materials, 167, pp. 20-32, (2018)
  • [7] Choe D, Gardoni P, Rosowsky D, Et al., Probabilistic capacity models and seismic fragility estimates for RC columns subject to corrosion, Reliability Engineering & System Safety, 93, 3, pp. 383-393, (2008)
  • [8] Yeh Y K, Mo Y L, Yang C Y., Seismic performance of rectangular hollow bridge columns, Journal of Structural Engineering, 128, 1, pp. 60-68, (2002)
  • [9] Jiang Huanjun, Wang Bin, Lv Xili, Performance limit states and deformation limits of RC beams and columns, Building Structure, 40, 1, pp. 10-14, (2010)
  • [10] Liu Bangyu, Jiang Huanjun, Numerical analysis of RC structures corroded by chloride, Structural Engineers, 35, 5, pp. 47-53, (2019)
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