全长黏结螺纹玻璃纤维增强聚合物抗浮锚杆蠕变试验研究

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Abstract Based on four pull-out creep tests of full-length bonding thread GFRP anti-floating anchors under long-term load，the creep mechanics model of pulling anchor has been established，and the creep mechanics parameters of the model were derived and the correctness of the model was validated in this paper. In addition，the concepts of the time damage effect were developed; the long-term pull-out strength of GFRP anti-floating anchor has been obtained. The experimental results demonstrate that， in moderately weathered granite，creep behavior of GFRP anti-floating anchors occurred under the ultimate load of 40%，and the creep properties of GFRP anti-floating anchor are excellent under the low load level which meets the needs of projects. The Burgers model can well describe the creep law of GFRP anti-floating anchors，and the predicted results are consistent with the experimental results，and that the mechanical parameters in the Burgers model are reduced gradually with the increase of drawing load. It has better applicability that creep damage model is used to predict the long-term pull-out strength of GFRP anti-floating anchors.

Key words： moderately weathered granite glass fiber reinforced polymer(GFRP) anti-floating anchor pull-out test；creep long-term pull-out strength damage

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http://www.rockmech.org/EN/Y2015/V34/I04/804

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