Experimental Study on Bond Strength of Foundation Slabs and Anti-floating Anchors with Different Materials
WANG Fengjiao1, BAI Xiaoyu1,*, ZHANG Yunguang2, JING Desheng1, ZHANG Mingyi1, WANG Haigang3, HOU Dongshuai1
1 School of Civil Engineering, Qingdao University of Technology, Qingdao 266520, Shandong, China 2 Qingdao Urban Construction Investment (Group) Co., Ltd., Qingdao 266101, Shandong, China 3 Shandong Expressway Engineering Construction Group Co., Ltd., Jinan 250014, China
Abstract: Glass fiber reinforced polymer (GFRP) anchor has many advantages such as strong corrosion resistance, high tensile strength, poor conductivity and relatively low cost, so it has become a potential substitute for steel anchor in anti-floating engineering of underground structures. The ultimate pullout tests of GFRP and steel anti-floating anchors were carried out on the inverted foundation slab to clarify the bonding and anchoring characteristics between GFRP anti-floating anchor and foundation slab. The influence mechanism of anchor bar material, vertical ancho-rage length, bending radius, bending anchorage length and bond length on the bond strength between anti-floating anchor and foundation slab is revealed. The results show that: (1) GFRP anti-floating anchors and straight-anchored steel anti-floating anchors are prone to shear slip failure, and curved-anchored steel anchors are prone to anchor bar fracture failure. (2) Under the experimental conditions, the bond strength between the anti-floating anchor with a diameter of 28 mm and the base plate is between 1.23—7.79 MPa. (3) Bending anchorage length is the main factor affecting the bond strength between anti-floating anchor and foundation slab, and the effect on GFRP anti-floating anchor is the most significant. (4) Comparing the bond-slip curves of the two kinds of anti-floating anchors, there is an obvious inflection point in the bond-slip curve of the straight-anchored steel anchor, while the straight-anchored GFRP anchor is almost linearly rising.
王凤姣, 白晓宇, 张云光, 井德胜, 张明义, 王海刚, 侯东帅. 不同材质抗浮锚杆与基础底板的黏结强度试验研究[J]. 材料导报, 2023, 37(22): 22050046-8.
WANG Fengjiao, BAI Xiaoyu, ZHANG Yunguang, JING Desheng, ZHANG Mingyi, WANG Haigang, HOU Dongshuai. Experimental Study on Bond Strength of Foundation Slabs and Anti-floating Anchors with Different Materials. Materials Reports, 2023, 37(22): 22050046-8.
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2023, Vol. 37 
