考虑锚固体不均匀及杆体脱黏效应的GFRP抗浮锚杆杆体荷载分布函数

doi:10.13722/j.cnki.jrme.2019.0006

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Abstract On the basis of the load-transfer theory and Kelvin displacement solution，distribution functions of the axial force and shear stress of the GFRP anti-floating anchor rod body along the bolting depth under ideal conditions were deduced and verified through a pullout test for 2 GFRP anti-floating anchors with the same type. The test results show that the distribution curves of the axial force and shear stress are similar to the theoretical curves，which proves the practicability of the developed theory in solving the load-distribution function of the GFRP anchor rod body. Due to the unevenness of the anchorage body and debonding effect of the anchor，however，the test shear stress value is lower than the theoretical value and the main distribution range of the test shear stress is deeper. At the same time，the unevenness of the anchorage body and debonding effect of the anchor contribute to the phenomenon that the axial force decreases slowly and its disappearance depth is larger than the theoretical value. The theoretical distribution function of the shear stress was corrected by using the average shear stress attenuation method under the fixed debonding length and the method of moving down the elastic section，and the distribution function of the shear force was also amended through the functional relationship between the axial force and shear stress distributions. It is shown that the accuracy of the revised load-distribution curves is enhanced obviously.

Key words： foundations GFRP anti-floating anchors axial force shear stress ultimate debonding section debonding effect unevenness of anchorage body

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	Articles by authors
	KUANG Zheng1
	BAI Xiaoyu1
	ZHANG Mingyi1
	WANG Yonghong1
	YAN Nan2

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KUANG Zheng1,BAI Xiaoyu1,ZHANG Mingyi1, et al. Load distribution function of GFRP anti-floating anchors considering the anchorage body unevenness and the anchor debonding effect[J]. , 2019, 38(6): 1158-1171.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2019.0006 OR http://www.rockmech.org/EN/Y2019/V38/I6/1158

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