The experimental study on mechanical properties of high strength grouting material and full grouting sleeve connector after different freeze-thaw cycles were carried,and the damage of full grouting sleeve after freeze-thaw cycles was simulated by ABAQUS.The results show that the compressive strength loss of the test block is the most serious after the freeze-thaw cycle.Within 50 freeze-thaw cycles,the loss rate of flexural strength of the test block is less than 5%.Under the action of freeze-thaw cycles,the bonding force of each contact surface of the specimen decreases,the shear force at the ring rib position increases,the strain decreases,and the average failure displacement increases.After 75 freeze-thaw cycles,the ultimate bond strength of the specimens decreases by 10.3%on average.The comparison between the test and the simulation shows that when the freeze-thaw cycle is 75 times,the grouting material in the full grouting sleeve is seriously damaged,but the anchoring performance between the grouting material and the steel bar is not completely invalid.When the freeze-thaw cycle is 100 times,the steel bar is scraped out and the specimen is destroyed.
high strength grouting materialfull grouting sleevefreeze-thaw cyclebonding performancecompressive strengthbroken form
NETL
NSTL
万方数据
