Seismic fragility analysis of reinforced concrete structures considering reinforcement corrosion

被引：0
|
作者：
Dai K. [1 ]
Yu X. [2 ,3 ]
Li Y. [4 ]
Lü D. [3 ]
机构：
[1] School of Civil Engineering, Zhengzhou University, Zhengzhou
[2] College of Civil Engineering and Architecture, Guilin University of Technology, Guilin
[3] School of Civil Engineering, Harbin Institute of Technology, Harbin
[4] China State Construction Engineering Corporation Limited, Egypt Branch, New Cairo
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2022年 / 43卷 / 08期
关键词：
RC structure; Reinforcement corrosion; Seismic capacity; Seismic demand; Seismic fragility;
D O I：
10.14006/j.jzjgxb.2021.0081
中图分类号：
学科分类号：
摘要：
Reinforcement corrosion is an important factor that affects the durability of reinforced concrete (RC) structures. It can lead to elongation of structural natural period, change of structural demand, and deterioration of seismic capacity. This makes the seismic fragility analysis results for the corroded RC structures different from those for the uncorroded RC structures. An RC frame structure designed according to the existing code was taken as a study case. Nonlinear finite element models of uncorroded and corroded RC frame structures were developed and validated. Seismic fragility curves and the corresponding parameters of the case study building under the uncorroded and corroded conditions were obtained by both the cloud method and the stripe method. The special characteristics of the seismic fragility analysis method for the corroded RC structures were analyzed and their effects on the corresponding seismic fragility results were examined. The results show that the seismic fragility of the corroded RC structure cannot be estimated correctly without considering the elongation of structural period due to reinforcement corrosion. The seismic fragility analysis using the cloud method probably results in a lower failure probability exceeding a specific limit state for the corroded structure than that for the uncorroded counterpart. Therefore, the stripe method can better reflect the effect of reinforcement corrosion on the seismic fragility of RC structures than the cloud method. Ignoring the deterioration of structural seismic capacity will underestimate the results of seismic fragility of corroded RC structures. The Pushover-based limit state definition method is recommended to be used in the seismic fragility analysis of corroded RC structures. © 2022, Editorial Office of Journal of Building Structures. All right reserved.
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页码：20 / 31
页数：11
相关论文
共 42 条
  • [1] DU Y G, CLARK L A, CHAN A H C., Residual capacity of corroded reinforcing bars[J], Magazine of Concrete Research, 57, 3, pp. 135-147, (2005)
  • [2] LEE H S, CHO Y S., Evaluation of the mechanical properties of steel reinforcement embedded in concrete specimen as a function of the degree of reinforcement corrosion[J], International Journal of Fracture, 157, 1, pp. 81-88, (2009)
  • [3] WU Qing, YUAN Yingshu, Experimental study on the deterioration of mechanical properties of corroded steel bars, China Civil Engineering Journal, 41, 12, pp. 42-47, (2008)
  • [4] XU Shanhua, The models of deterioration and durability evaluation of reinforced concrete structure, pp. 53-70, (2003)
  • [5] JIN Weiliang, LU Qingfang, ZHAO Yuxi, Et al., Research progress on the durability design and life prediction of concrete structures, Journal of Building Structures, 28, 1, pp. 7-13, (2007)
  • [6] LUO Daming, NIU Ditao, SU Li, Research progress on durability of stressed concrete under environmental actions, Engineering Mechanics, 36, 1, pp. 4-17, (2019)
  • [7] LU Qingfang, Fundamental research on durability environmental zonation standard (DEZS) of concrete structures, (2007)
  • [8] Seismic ground motion parameters zonation map of China:GB 18306-2015, (2015)
  • [9] LU Dagang, YU Xiaohui, WANG Guangyuan, Theoretical study of probabilistic seismic risk assessment based on analytical functions of seismic fragility, Journal of Building Structures, 34, 10, pp. 41-48, (2013)
  • [10] YU Xiaohui, LU Dagang, WANG Guangyuan, Application study of probabilistic seismic risk assessment based on analytical functions of seismic fragility, Journal of Building Structures, 34, 10, pp. 49-56, (2013)
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