Friction characteristics of post-tensioning tendons in full-scale structures

被引：15

作者：

Kim, Sang-Hyun ^{[1
]}

Park, Sung Yong ^{[2
]}

Park, YoungHwan ^{[2
]}

Jeon, Se-Jin ^{[1
]}

机构：

[1] Ajou Univ, 206 Worldcup Ro, Suwon 16499, Gyeonggi Do, South Korea

[2] Korea Inst Civil Engn & Bldg Technol, 283 Goyang Daero, Goyang Si 10223, Gyeonggi Do, South Korea

来源：

ENGINEERING STRUCTURES | 2019年 / 183卷

关键词：

Friction coefficient; Prestressing tendon; Strand; Sheath; Duct; Prestressed concrete structure; Optical fiber sensor; Fiber Bragg grating; BRAGG GRATING SENSORS; PRESTRESS-LOSS; STEEL STRAND; BEAMS;

D O I：

10.1016/j.engstruct.2019.01.026

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Friction characteristics between the strands and the duct have a significant effect on the distribution of prestressing force and can be incorporated by the curvature and wobble friction coefficients in the design of prestressed concrete structures. However, the recommended friction coefficients show a wide range of variation, which can cause the inaccurate estimation of prestressing force. In this study, the friction coefficients were evaluated based on the strains of tendons measured by Smart Strands using optical fiber sensors in a full-scale test specimen and two actual long-span girder bridges. The test specimen was investigated to determine how the duct shapes and other factors affect the friction coefficients. Simultaneous equations method and least squares method for obtaining friction coefficients were employed and the results were compared in the actual bridges. This study shows one of the applications of the developed Smart Strand system that can overcome several drawbacks of the existing measurement system.

引用

页码：389 / 397

页数：9

共 50 条

[1] PROTECTING POST-TENSIONING TENDONS IN CONCRETE STRUCTURES
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[J]. CIVIL ENGINEERING, 1982, 52 (12): : 43 - 45
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[J]. CIVIL ENGINEERING, 1978, 48 (03): : 72 - 73
[4] Factors that influence friction in tendons of unbonded post-tensioning systems
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[5] LARGE POST-TENSIONING TENDONS
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[J]. JOURNAL PRESTRESSED CONCRETE INSTITUTE, 1972, 17 (06): : 70 - 71
[6] LARGE POST-TENSIONING TENDONS
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[J]. JOURNAL PRESTRESSED CONCRETE INSTITUTE, 1972, 17 (03): : 14 - &
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[10] REALISTIC REQUIREMENTS FOR UNBONDED POST-TENSIONING TENDONS
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