A TIME-VARYING STRESS-STRAIN MODEL OF STIRRUPS CONFINED CONCRETE CONSIDERING THE EFFECT OF PITTING CORROSION

WANG Bin; FENG Boqiang; SUN Yongfeng; YANG Qian; WANG Jiabin

doi:10.13204/j.gyjzG20092906

Volume 51 Issue 9

Jan. 2022

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WANG Bin, FENG Boqiang, SUN Yongfeng, YANG Qian, WANG Jiabin. A TIME-VARYING STRESS-STRAIN MODEL OF STIRRUPS CONFINED CONCRETE CONSIDERING THE EFFECT OF PITTING CORROSION[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(9): 106-112,155. doi: 10.13204/j.gyjzG20092906

Citation:

WANG Bin, FENG Boqiang, SUN Yongfeng, YANG Qian, WANG Jiabin. A TIME-VARYING STRESS-STRAIN MODEL OF STIRRUPS CONFINED CONCRETE CONSIDERING THE EFFECT OF PITTING CORROSION[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(9): 106-112,155. doi: 10.13204/j.gyjzG20092906

Citation:

WANG Bin, FENG Boqiang, SUN Yongfeng, YANG Qian, WANG Jiabin. A TIME-VARYING STRESS-STRAIN MODEL OF STIRRUPS CONFINED CONCRETE CONSIDERING THE EFFECT OF PITTING CORROSION[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(9): 106-112,155. doi: 10.13204/j.gyjzG20092906

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A TIME-VARYING STRESS-STRAIN MODEL OF STIRRUPS CONFINED CONCRETE CONSIDERING THE EFFECT OF PITTING CORROSION

doi: 10.13204/j.gyjzG20092906

1. School of Civil and Architecture Engineering, Xi'an Technological University, Xi'an 710021, China;
2. State Key Laboratory of Green Building in Western China, Xi'an University of Architecture & Technology, Xi'an 710055, China

Received Date: 2020-09-29
Available Online: 2022-01-11

Abstract

Abstract

In order to study the influence of pitting corrosion on the stress-strain of concrete confined by stirrups, based on the existing research results, the time-varying damage model of corroded reinforcement with uniform corrosion and pitting corrosion was obtained through analyzing the change rule of pitting depth and probability distribution with corrosion time. Then, the existing confined concrete stress-strain model was modified by analyzing the influence of pitting corrosion on confined concrete with corroded stirrups. Finally, a time-varying stress-strain model of concrete confined by strirrups considering the effect of pitting corrosion was constructed, and the reliability of the model was verified by comparing the calculated results with the experimental results. The results showed that the proposed model could better reflect the change of mechanical properties of concrete with corroded stirrup and provide reference to elaborate numerical analysis of reinforced concrete structure in chloride ion erosion.
- corroded stirrup,
- pitting corrosion,
- damage model,
- time-varying stress-strain model,
- confined concrete

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References(19)

References

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