Analysis of transfer length of pre-tensioned prestressed CFRP bars and sea water sea-sand concrete slab

doi:10.19936/j.cnki.2096-8000.20221228.005

Abstract

Abstract: In order to study the prestress transfer length of pretensioned CFRP tendons, the bond performance of CFRP bars and sea water sea-sand concrete is tested. According to the theoretical analysis and finite element numerical simulation, several factors affecting the bond performance of CFRP bars and sea water sea-sand concrete are analyzed. The finite element model of pre-tensioned prestressed CFRP bars and sea water sea-sand concrete slab is established by ABAQUS software, and the transfer length of pre-tension prestressed CFRP bars and sea water sea-sand concrete slab is analyzed. The results show that the higher the concrete strength is, the shorter the transfer length of the prestressed member is, because the increase of the bond strength makes the transfer distance of the prestressed shorter. The transfer length can be significantly increased with the increase of CFRP reinforcement and tension control stress. This paper also puts forward the calculation formula of the transfer length CFRP bars sea water sea-sand concrete prestressed members.

Key words: carbon fiber reinforced composite(CFRP), sea water sea-sand concrete, bond performance, transfer length, parameter analysis

CLC Number:

TB332

HUANG Yu-xuan, FAN Ling-yun, GAO Jing. Analysis of transfer length of pre-tensioned prestressed CFRP bars and sea water sea-sand concrete slab[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(12): 37-45.

References

[1] MEYER K F. Transfer and development length of 0.6-inch diameter prestressing strand in high-strength lightweight concrete[D]. Georgia Institute of Technology, 2002.
[2] BUCKNER C D. A review of strand development length for pretensioned concrete members[J]. Pci Journal, 1995, 40(2): 84.
[3] LANE S N. A new development length equation for pretensioned strands in bridge beams and 211 piles[M]. USA: Federal Highway Administration, 1998: 65-67.
[4] 刘九正. 先张法混凝土构件预应力传递长度试验研究[J]. 中外公路, 2013, 33(5): 201.
[5] MITCHELL C S. A review of initial end slip as criteria of acceptable strand bond quality and the relationship between strand diameter and transfer length for prestressed concrete members[D]. University of Wyoming, 2008.
[6] CHOI W. Flexural behavior of prestressed girder with high strength concrete[D]. North Carolina State University, 2006.
[7] Guide for the design and construction of structural concrete reinforced with FRP bars: ACI Committee 440[S]. ACI 440.1R-06, U.S.A, 2006.
[8] SAEED Y M. Behavior of prestressed concrete beams with CFRP strands[D]. Portland State University, 2016.
[9] LIM E Y. Bond strength and characteristics of carbon fiber reinforced plastic (CFRP) bars in concrete beams[D]. University of Windsor,
2000.
[10] JAWDHARI A R. Behavior of RC beams strengthened in flexure with spliced CFRP Rod panels[D]. University of Kentucky, 2016.
[11] JOSHI K. Investigation of carbon fiber composite cables (CFCC) in prestressed concrete piles[D]. The Florida State University, 2013.
[12] OKELO R. Development and splice lengths criteria for straight fiber reinforced polymer composite bars in tension[D]. The University of Texas at Arlington, 2002.
[13] AMER A H. Structural behavior of concrete structures pretensioned with fiberglass tendons[D]. University of Illinois at Chicago, 1993.
[14] LIANG Y J. Ductility and damage evaluation of post-tensioned concrete beams with hybird FRP tendon[D]. University of Illinois at Chicago, 2004.
[15] 谢丽丽, 冯辉, 刘立新, 等. 先张法预应力混凝土梁钢绞线预应力传递长度的试验研究[J]. 建筑科学, 2007, 23(5): 34-36, 4.
[16] 程文瀼, 李爱群, 王铁成, 等. 混凝土结构设计原理[M]. 5版. 中国建筑工业出版社, 2011.
[17] 混凝土结构设计规范: GB 50010—2010[S]. 北京: 中国建筑工业出版, 2015.
[18] 宋泽鹏, 陆春华, 宣广宇, 等. 螺纹GFRP筋与混凝土黏结性能试验与理论计算[J]. 建筑材料学报, 2021, 24(4): 887-894.
[19] 预应力混凝土结构设计规范: JGJ 369—2010[S]. 北京: 中国建筑工业出版, 2016.