Creep tests and standard linear solid model for large-diameter glass fiber-reinforced polymer anti-floating anchors
BAI Xiao-yu1,2, ZHENG Chen1, ZHANG Ming-yi1,2, WANG Yong-hong1,2, WANG Hai-gang1
1. School of Civil Engineering, Qingdao Technological University, Qingdao 266033, China; 2. Cooperative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone, Qingdao 266033, China
Abstract：With the advancement of science and technology and the concept of green environmental protection, China's construction industry is gradually moving towards green and sustainable buildings. The application of glass fiber-reinforced polymer (GFRP) anchor rods instead of the traditional steel anchor rods and underground anti-floating engineering can not only save the engineering cost effectively, but also extend the service life of anti-floating structures and prevent the pollution of corrosion steel bars to underground environment. In order to further explore the changes of mechanical properties of large-diameter GFRP anti-floating bolts under long-term stress, an indoor full-scale test on GFRP anti-floating bolts is conducted by applying long-term loads. The test results show that the test bolt does not creep until 38%~45% of its failure load is applied. Through the standard linear solid model, the creep law of GFRP anti-floating bolts is investigated. The model fits the stiffness versus time curve, and the fitted curve agrees well with the measured one. Furthermore, the combination of damage mechanics theory and creep model is used to derive the uplift capacity of GFRP anti-floating anchors, and the accurate prediction of long-term bearing capacity of GFRP anti-floating anchors is realized, which provides a theoretical basis for the application of GFRP anchors in anti-floating engineering.
白晓宇, 郑晨, 张明义, 王永洪, 王海刚. 大直径GFRP抗浮锚杆蠕变试验及蠕变模型[J]. 岩土工程学报, 2020, 42(7): 1304-1311.
BAI Xiao-yu, ZHENG Chen, ZHANG Ming-yi, WANG Yong-hong, WANG Hai-gang. Creep tests and standard linear solid model for large-diameter glass fiber-reinforced polymer anti-floating anchors. Chinese J. Geot. Eng., 2020, 42(7): 1304-1311.
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