Comparative analysis of pull-out resistance of post-anchored chemical anchor bolts in lightweight aggregate concrete and ordinary concrete under freeze-thaw cycles
To study the pull-out properties of chemical anchor bolts in lightweight aggregate concrete under freeze-thaw cycles,the influence of the freeze-thaw cycles on the tensile properties is analyzed,and the performance of post-anchored chemical anchor bolts in ordinary concrete.The inverted conical chemical anchor bolts are selected to make 24 chemical anchor bolts of lightweight aggregate concrete and ordinary concrete respectively.The static restraint tensile tests are conducted to compare the experimental phenomena,and analyze the pulling resistance and bonding strength of chemical anchor bolts in the two concretes.It is found that the failures of the inverted conical chemical anchor bolts are mainly in the glue-reinforcement interface in both two concretes.The bond strength and pull-out resistance decrease with the increase of freeze-thaw cycles,but the decrease rate in lightweight aggregate concrete is obviously lower than that in ordinary concrete.
chemical anchor boltslightweight aggregate concretefreeze-thaw cyclebonding strengthpull-out bearing capacity
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