Research on Transfer Length of Pretensioned Prestressed Concrete Members Under Corrosion

YI Ju; WANG Lei; LEI Ming; HU Zhuo; TU Ronghui

doi:10.13204/j.gyjzG22042520

Volume 53 Issue 10

Oct. 2023

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2023 > 53(10): 44-50

YANG Yuan, CUI Qiandao, LIAN Jijian, LIU Hongbo, ZHOU Guangen, CHEN Zhihua. LSTM-BASED DAMAGE PREDICTION AND ASSESSMENT OF SPATIAL FRAME STRUCTURE[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(7): 203-208. doi: 10.13204/j.gyjzG20092308

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YI Ju, WANG Lei, LEI Ming, HU Zhuo, TU Ronghui. Research on Transfer Length of Pretensioned Prestressed Concrete Members Under Corrosion[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(10): 44-50. doi: 10.13204/j.gyjzG22042520

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Research on Transfer Length of Pretensioned Prestressed Concrete Members Under Corrosion

doi: 10.13204/j.gyjzG22042520

YI Ju¹,
WANG Lei^{2
,
,},
LEI Ming¹,
HU Zhuo²,
TU Ronghui^2,3

1. School of Civil Engineering, Changsha University, Changsha 410022, China;
2. School of Civil Engineering, Changsha University of Science & Technology, Changsha 410114, China;
3. Traffic Engineering Management Center of Zhejiang Province, Hangzhou 310014, China

Received Date: 2022-04-25
Available Online: 2023-12-18

Abstract

Abstract

The evaluation of prestress transfer length of corroded pretensioned prestressed concrete (PC) members plays a significant role in assessing the performance of these structures. Firstly, the concrete cracking at member end and mechanical characteristics at the transfer interface caused by prestress releasing were analyzed based on the thick-walled cylinder model. Then, considering the rust expansion characteristics of seven-wire cross-section of steel strands, the further cracking characteristics of concrete along the transfer length under corrosion were analyzed by combining initial releasing cracking and corrosion-induced cracking, the relations between corrosion depth, corrosion loss and interfacial rust expansion displacement were established along the transfer length, considering the tensile softening of cracked concrete, the radial confining stress model of strands under the combined confinement of cracked concrete and stirrups was derived along the transfer length, then the bond stress distribution was obtained. Finally, based on the equilibrium relations between bond stress and prestress, the strain distribution of steel strands and concrete was obtained, and the prestress transfer length under corrosion-induced concrete cracking was determined. The comparison between analytical and experimental results showed that this method could reasonably predict the development laws of transfer length of corroded pretensioned PC members with various corrosion locations and degrees.
- pretensioned,
- prestressing,
- concrete,
- corrosion,
- transfer length

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References(19)

References

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