Bond Behavior Of Post-installed Rebar With Inorganic Adhesive

In recent years, anchorage technology has been widely applied in the fields of strengthening and retrofitting engineering in our country. However, the current research mainly is concentrated in the application of organic adhesive, few study has been carried out on the behavior of inorganic adhesive. In this paper structural performance of cement-based inorganic adhesive specimens were investigated under static and low cyclic axial loading test. The effect of embedment depth on anchorage performance has been analyzed and bond-slip model as well as restoring-force model in low cyclic loading have been set up, according to which theory basis could be studied in mechanical properties of inorganic adhesive and safety of anchorage. The main research contents are as follows.(1) The bond-slip model which has been existed was reviewed and has been summarized.(2)Static pull-out experiment was carried out on inorganic adhesive specimens. The tensile capacity and the slip at the loaded end were surveyed to inorganic adhesive anchorage.Ultimate strength, failure form, bond stress distributing curve and bond-slip model of cement based inorganic adhesive specimen in static load were completely studied. The position function of bond-slip model mentioned in this study was amended.(3) Low cyclic loading test was carried out on inorganic adhesive specimens. The failure mode was surveyed and hysteretic curves of load-slip,load-strain curve and bond-slip restoring force model were studied, which could provide technical basis for seismic application.(4) ABAQUS software was used to model, analyze and calculate, bond-slip model needs to be amended and the results have satisfactory agreement with the testing values.At the end, the conclusions for this study were summarized and the following works were also suggested.