Study On Experimental On Pull-out Mechanical Properties Of The Embedded Hanging Parts

With the rapid development of prefabricated concrete structure in our country recently,all kinds of embedded hanging parts applied widely.There is no performance testing standard for embedded hanging parts in our country currently,the lack of standard mechanical performance testing methods results in thesecurity risk during use.Based on this,the mechanical properties of the test by drawing embedded hanging parts can understand the mechanical properties and failure modes embedded hanging parts,providing the basis for a standard test method to determine.The main work and achievements are as follows:Consider embedded hanging parts and anchors tension forces are similar,summarizes the domestic and foreign anchor specifications,recommendations for determining the embedded drawing hanging parts standard test method for mechanical properties.24 specimens were get on pull-out tests,in which the influence of the concrete slab 15 borderless,bordered concrete slab 9.Analysis of the testing process different hanging parts embedded in the same concrete strength,failure mode and pull-out strength.By contrast with the nominal load value,determine the feasibility of this test method.Using ABAQUS finite element software to draw the mechanical behavior of embedded hanging parts given by and company B in finite element simulation,the ultimate load values company A simulation nominal load values were analyzed to determine what relationship there is between the two.The company B simulation ultimate load value and the nominal value of the load were analyzed to determine what kind of embedded hanging parts of sample size is more reasonable.The results obtained through simulation analysis:company A ultimate load value and the nominal value of the load company A two kinds of embedded hanging parts too large in comparison;three simulated specimens dimensions calculate by length × width × thickness ?800mm × 200mm × 400mm are suitable for the actual size of the specimen.Provide the basis for the size of specimen design.Testing results obtained by the analysis:company A offers embedded hanging parts in the riser member,screw anchors and anchor rebar bending occurred hanging parts embedded pull off damaged concrete slab specimens stud bolt splitting failure occurred tablet riser member occurred over the concrete cone damage,B enterprises all three embedded hanging parts of concrete cone damage has occurred,this test method can be effectively measured ultimate load hanging parts embedded value,indicating that this test method is feasible.