Experimental Research on Pull-Out Performance of Grouted Anchor Rods with Bushings Inside Brick Masonry
The technique of grouted anchor rods with bushings is a new strengthening and repair technique that can be used for repairing mass brick masonry ancient buildings without damaging their appearance.In order to study the pull-out performance of grouted anchor rods inside historic masonry,pull-out tests on 21 anchor rods with the fullness of mortar joints,anchoring depth,drilling diameter and anchorage direction as research parameters were designed and completed,and the failure modes of anchor rods,pull-out force-slip curves,the distribution of anchor bar strains as well as interface bonding stresses and peak pull-out forces were analyzed.The test results showed that the pull-out force-slip curves of grouted anchor rods with bushings exhibited distinct four-stage characteristics;the anchor bars within the anchor rods showed resistance to yielding;the failure modes of anchor rods were directly affected by the fullness of mortar joints and the drilling diameter;the peak pull-out forces of anchor rods had a non-linear growth relation with the anchorage depth;the peak pull-out forces of anchor rods with high fullness of mortar joints and large drilling diameter were high;and compared with horizontal anchor rods,the peak pull-out forces of vertical anchor rods were significantly higher.
grouted anchor rod with bushingbrick masonryfullness of mortar jointanchoring depthdrilling diameterpull-out performance
NETL
NSTL
万方数据
维普
