EXPERIMENTAL RESERCH ON SHEAR PROPERTIES OF RC BEAMS REINFORCED WITH FRP GRIDS AND EPOXY MORTAR

DU Min; CHEN Siyuan; GUO Jingye; HAO Han; GUO Rui

doi:10.13204/j.gyjzG20110320

Volume 51 Issue 8

Nov. 2021

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DU Min, CHEN Siyuan, GUO Jingye, HAO Han, GUO Rui. EXPERIMENTAL RESERCH ON SHEAR PROPERTIES OF RC BEAMS REINFORCED WITH FRP GRIDS AND EPOXY MORTAR[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(8): 206-213,119. doi: 10.13204/j.gyjzG20110320

Citation:

DU Min, CHEN Siyuan, GUO Jingye, HAO Han, GUO Rui. EXPERIMENTAL RESERCH ON SHEAR PROPERTIES OF RC BEAMS REINFORCED WITH FRP GRIDS AND EPOXY MORTAR[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(8): 206-213,119. doi: 10.13204/j.gyjzG20110320

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EXPERIMENTAL RESERCH ON SHEAR PROPERTIES OF RC BEAMS REINFORCED WITH FRP GRIDS AND EPOXY MORTAR

doi: 10.13204/j.gyjzG20110320

DU Min¹,
CHEN Siyuan²,
GUO Jingye³,
HAO Han⁴,
GUO Rui^{5
,
,}

1. Department of Transportation and Municipal Engineering, Sichuan College of Architectural Technology, Chengdu 610399, China;
2. Fujian Academy of Building Research Co., Ltd., Fuzhou 350001, China;
3. China Railway Shanghai Design Institute Group Co., Ltd., Shanghai 200070, China;
4. China Railway Zhengzhou Group Co., Ltd., Zhengzhou 450000, China;
5. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China

Received Date: 2020-11-03
Available Online: 2021-11-10
Publish Date: 2021-11-10

Abstract

Abstract

The four-point bending static loading tests of seven test beams were carried out to study the interface mechanism and failure mode of reinforced concrete beams strengthened with FRP grids and epoxy mortar in the shear process. The shear reinforcement effect of this method with different reinforcement parameters and the actual stress behaviors of FRP grids were analyzed. The five calculation models were analyzed and compared based on the collected test data. The results showed that the specimens strengthened with FRP grid could constrain the development of diagonal cracks, delay the formation of main oblique cracks, greatly improve the ultimate bearing capacity and deformation capacity of specimens, and the reinforcement effect was remarkable. When the width of the shear diagonal crack of the original concrete beam was too large or the shear compression failure occured, the interface between the reinforcement layer and the original concrete beam was easy to produce different degrees of peeling failure. In a certain range, the shear contribution of FRP grids was negatively correlated with the concrete strength or shear-span ratio, and positively correlated with the reinforcement amount of FRP grids, and the greater the concrete strength or shear-span ratio, the higher the possibility of interface peeling off in advance.
- FRP grid,
- epoxy mortar,
- reinforced concrete beam,
- shear porperty test

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References(19)

References

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