In order to analyze the connection performance of grouted anchor lap splice specimens under freeze-thaw en-vironments,the type of grouting material (high-strength cementitious grout,epoxy resin grout,geopolymer grout) and the number of freeze-thaw cycles (0,50,100) were selected as the main test parameters.A total of 27 unidirectional pull-out tests were conducted on grouted anchor lap splice specimens.The changes in specimen appearance,failure modes,ultimate load,load-displacement curves,and load-strain curves were analyzed.After 50 freeze-thaw cycles and at room temperature,the specimens exhibited rebar fracture failure,while after 100 freeze-thaw cycles,the speci-mens exhibited splitting failure.The results show that the connection performance of grouted anchor lap splice speci-mens with the three types of grouting materials was reliable at room temperature and after 50 freeze-thaw cycles.How-ever,when the number of freeze-thaw cycles reached 100,the ultimate load significantly decreased.The ultimate bond strength of the specimens gradually decreased with the increase in freeze-thaw cycles.The grouted anchor lap splice connection performance is reliable,and all three types of grouting materials can meet anchoring requirements,provi-ding reference value for the selection of grouting materials.
关键词
约束浆锚搭接/冻融循环/单向拉伸/锚固能力/极限粘结强度
Key words
restraint grouting-anchoring overlap-joint/freeze-thaw cycle/uniaxial tensile test/anchoring capacity/ultimate bond strength
维普
万方数据