doi:10.16186/j.cnki.1673-9787.2020080005

Received:2020-08-01 00:00:00

Revised:2020-09-08 00:00:00

Published:2022/07/15

Research on horizontal bearing characteristics of CFRP composite piles in seawater erosion environment

ZHANG Jianwei1,2, FAN Yalong1, YUE Jianwei1,2, LI Rongxiang1, WANG Hao1,2

1.School of Civil Engineering and Architecture， Henan University， Kaifeng 475004 ， Henan， China;2.Henan Provincial Research Center of Engineering on Intelligent Construction of Rail Transit， Kaifeng  475004 ， Henan， China

Abstract: In order to study the horizontal bearing characteristics of CFRPcomposite piles in the marine envi- ronment , artificially configured high-concentration seawater was used as the immersion solution to carry out tensile tests of CFRP materials under different immersion times,flexural rigidity tests of the pile body, and full-scale model tests of horizontal load-bearing piles. The results showed that under the same test conditions, after 180 days of soaking, the strength of CFRP tendons，CFRP sheets, and steel bars decreased by 5.34%，6. 64% ， and 12. 93% , respectively; The bending stiffness of composite piles and reinforced concrete piles decreased by 7.89% and 26.50% ; 4 kN horizontal load was applied to the top of the pile ,the maximum dis- placements of composite piles and reinforced concrete piles were 14.22 mm and 18. 65 mm，respectively, which were 17.42% and 40.12% higher than the horizontal displacements in the unsoaked stage;The maximum bending moments of the composite piles and reinforced concrete piles were 417.5 N·m and 514.1N·m , respectively, which were 7.30% and 21.29% higher than the unsoaked stage. The experimental results could provide references for the horizontal bearing capacity design of CFRP composite piles in marine environments.

Key words:CFRP composite pile;artificial seawater;soaking experiment;horizontal bearing characteristic;durability

海水侵蚀环境下CFRP复合桩水平承载特性研究_张建伟.pdf