CREEP TESTING STUDY OF FULL-LENGTH BONDING THREAD GLASS FIBER REINFORCED POLYMER ANTI-FLOATING ANCHOR
BAI Xiaoyu1，2，ZHANG Mingyi1，2，ZHANG Shunquan1，2
(1. College of Civil Engineering，Qingdao Technological University，Qingdao，Shandong 266033，China；2. Collaborative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone，Qingdao Technological University，
Qingdao，Shandong 266033，China)
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.
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2015, Vol. 34 
