Experimental study on bending performances of hybrid FRP-concrete composite T-beams

被引：8

作者：

Zhang P. ^{[1
,2
]}

Zhu H. ^{[1
,2
]}

Meng S. ^{[1
,2
]}

Lei Y. ^{[1
,2
]}

Wu G. ^{[1
,2
]}

Wu Z. ^{[2
]}

机构：

[1] Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University

[2] International Institute for Urban Systems Engineering, Southeast University

来源：

Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2010年 / 40卷 / 03期

关键词：

Bending performance; FRP-concrete composite beams; Hybrid effect; Interface mode; Wet-bond;

D O I：

10.3969/j.issn.1001-0505.2010.03.022

中图分类号：

学科分类号：

摘要：

A type of hybrid fiber reinforced polymer-concrete (HFRP-RC)composite beams with high durability is designed and researched. 12 pieces of 4-point bending experiments of T-shaped beams are carried out to further study the reliability of the wet-bonding and the performances of the HFRP-RC composite beams. After the yielding of the steel bars, the HFRP-RC composite beams still have secondary stiffness, high bearing capacity and good displacement ductility. The failure modes of all of the C50 beams are fiber fracture, showing that good bond behaviors can be achieved by externally bonding the FRP onto the precast concrete (referred to as dry-bond), by applying adhesive to the FRP shuttering before the fresh concrete is cast (referred to as wet-bond), and by coating gravel on the inside surface of the FRP shuttering before the fresh concrete is placed in position. Hybridizing the basalt fiber reinforced polymer (BFRP) with the carbon fiber reinforced polymer (CFRP) can improve the ultimate strain of the latter. And the higher the ratio of the BFRP is, the higher the ultimate strain of the CFRP is. Therefore, the improvement factor of the ultimate strain value of the CFRP should be introduced when calculating the critical mixing ratio and the theoretical capacity load values of the HFRP-RC composite beams.

引用

页码：548 / 553

页数：5

共 13 条

[1] Hao Q., Wang B., Ou J., Fiber reinforced polymer rebar's application to civil engineering, Concrete, 9, pp. 38-44, (2006)
[2] Wu Z., Bi W., Sakuma N., Innovative externally bonded FRP-concrete hybrid flexural members, Composite Structures, 72, 3, pp. 289-300, (2006)
[3] Shao Y., Wu Z.S., Bian J., Wet-bonding between FRP laminates and cast-in-place concrete, International Symposium on Bond Behavior of FRP in Structures, pp. 91-96, (2005)
[4] (2007)
[5] Canning L., Hollaway L., Thorne A.M., An investigation of the composite action of an FRP/concrete prismatic beam, Construction and Building Materials, 13, 8, pp. 417-426, (1999)
[6] Deskovic N., Triantafillou T.C., Meier U., Innovative design of FRP combined with concrete: short-term behavior, Journal of Structural Engineering, ASCE, 121, 7, pp. 1069-1078, (1995)
[7] Hulatt J., Hollaway L., Thorne A., Short term testing of hybrid T beam made of new prepares material, Journal of Composites for Construction, 7, 2, pp. 135-144, (2003)
[8] (2008)
[9] Kong Q., Experimental investigation of RC beam strengthened with CFRP, Journal of Zhengzhou University: Engineering Science, 25, 4, pp. 24-27, (2004)
[10] Li G., Zhang A., Jin W., Effect of sustaining load level on flexural behavior of RC beams retrofitted with CFRP sheets, China Civil Engineering Journal, 39, 1, pp. 13-20, (2006)

← 1 2 →