Experimental Study On Local Bearing Of Perforated Brick Of Shale And Finite-element Analysis

Fired model perforated brick of shale is a new type insulation architectural construction material of masonry. The main raw material of this brick is shale, with no clay, burning with high temperature, with major rate of hole. This brick has good action of insulation and cater the require insulation 50% in our province. There is a good application foreground because with protecting land resources and economizing energy.Firstly, the experimental studies of axial compression and local bearing of fired module perforated brick shale are done. In the experimental of perforated brick of shale, we get three phases of axial compression failure and state of cracking and failure. S econdly, we do the experiment of local bearing about perforated of shale. The test data of initial crack, distribution of crack, cracking load, failure load, failure state is obtained. In order to know the reason of increase of local bearing strength, we do the nonlinear finite-element analysis. From the result we know the reason of increase local bearing strength, appearance of crack, position of c rack, r eason o f c rack d eveloping. Wed iscuss t he d ispersion o f c ompression s tress a nd route of dispersion. Thirdly, the mode of actual and the mode with concrete pad stone are founded. The result is good. Fourthly, we get the magnifying coefficient of bearing strength through stating the data of experimental and the data of nonlinear finite-element analysis. We discuss the influencing factor of magnifying coefficient of bearing strength y and parameter b in γ. Lastly, we give y differing with design code for masonry structure. Some advice is given in design and construction.The result of experiment investigation indicates that the magnifying coefficient of bearing strength y differing with design code for masonry structure. The y less than the y in design code for masonry structure. The results of the nonlinear finite-element analysis discover the reason of increase of local bearing strength, the position of crack, the crack developing. There is increase of strength because increase of local bearing area with concrete pad stone. At last we give magnifying coefficient of bearing strength y and some advice in design and construction.