全长黏结GFRP抗浮锚杆界面剪切特性试验研究

doi:10.13722/j.cnki.jrme.2017.1616

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Abstract The field pull-out tests were conducted to the steel rebar and GFRP anti-floating anchor with sockets of different lengths and diameters buried in medium weathered granite. The distribution of the axial force and shear stress in GFRP anti-floating anchor body，anchorage body center and second interface(anchorage body/rock) were synchronously measured with the triple fiber grating sensors. The relative slippage between the anchor and anchorage body was obtained by the improved slippage test device and the multi-interface shear behavior of GFRP anti-floating anchor was studied. The synergy between GFRP anti-floating anchors was found to be better than the steel anchor in anti-floating. The bearing capacity of the GFRP anchor with diameter of 28 mm，anchorage length of 4.5 mm was up to 400 kN and its pull-out displacement was small，which meet the engineering needs. The maximum axial force of GFRP anchor is only 1 200–1 800 kPa，with the effective length of 1.5–1.8 m，and has a section of axial force attenuation. The maximum shear stress is 160–260 kPa，with the effective length of 1.8 m and significant stress concentration. The maximum axial force of the second interface is 1/6 times that of anchorage body and the section of axial force attenuation also exists but with a downward trend. The maximum shear stress occurred at 1/3 in anchorage body，with the effective length of 1.2 m.

Key words： rock mechanics medium weathered granite GFRP anti-floating anchor triple fiber bragg grating sensor shear stress field test

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	Articles by authors
	BAI Xiaoyu1
	2
	ZHANG Mingyi1
	2
	ZHU Lei1
	WANG Yonghong1
	ZHAO Tianyang1
	CHEN Xiaoyu1

Cite this article:

BAI Xiaoyu1,2,ZHANG Mingyi1, et al. Experimental study on shear characteristics of interface of full-bonding glass fiber reinforced polymer anti-floating anchors[J]. , 2018, 37(6): 1407-1418.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2017.1616 OR http://www.rockmech.org/EN/Y2018/V37/I6/1407

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