Numerical simulation of steam curing pressure and mechanical properties of autoclaved aerated concrete
Based on autoclaved aerated concrete,it uses large-scale finite element analysis software ABAQUS to study the numerical simulation of its steam curing pressure and mechanical properties,and the results show that the failure forms of autoclaved aerated concrete cube compressive test include beveled shear failure,longitudinal splitting failure and corner failure,and the X-type failure phenomenon of ordinary concrete does not appear,and compared with ordinary concrete,the end effect has less influence on the aerated concrete test block.The stress cloud of rebar extracted by post-processing in numerical simulation shows that the maximum stress of the lower rebar of the autoclaved aerated concrete slab reaches a yield strength of 355 MPa,and the rebar in the compression area has no yield stage.The concrete stress cloud showed that the concrete at the bottom of the concrete span had serious tensile damage,shear failure and bending failure occurred in the aerated concrete panel,and the concrete stress concentration phenomenon appeared at the loading point of the autoclaved aerated concrete slab.The numerical simulation results of JQ1 and JQ2 are in good agreement with the test values,the ratio of the cracking load results and the test values of the two specimens is in the range of 0.92 to 1.01,and the ratio of the ultimate load value results and the test values is in the range of 0.99 to 1.04,and the range of deviation is acceptable.After the cracking load of the simulation result of the specimen JQ1,there is a certain deviation from the test value,the test limit load is 38.5 kN,the numerical simulation limit load is 38.0 kN,the deviation is 1.30％,the difference between the numerical simulation value and the bearing capacity test value is small,and the numerical simulation is more accurate.
autoclaved aerationfinite element analysisnumerical simulationconcretemechanical properties
万方数据
维普
