The Simulation And Experimental Comparison Of The Masonry Structures’ Compressive And Aseismic Capacity

In this paper, the author firstly analyzes the main method of masonry structures’ nonlinear numerical analysis, summarizes masonry structures’ basic theory, such as the constitutive relations and failure criteria, researches on nonlinear finite element analysis, based on this model experiment of masonry structure. Considering the masonry is the composite material bonded by brick and mortar, finite element space models which separate bricks and mortar is established.By simulated compression test specimen of the common brick masonry, observing the whole process of the cracking and destruction, reach as the cracking loads and destroy loads of compression specimen. Compared the calculated results with the test result, the applicability of the model in the paper has been verified, and it would be proved that the finite element model can be used to assist the corresponding engineering research.Under the horizontal earthquake, the masonry shows complex mechanical characteristics in the pressure-shear condition. In order to study the seismic performance of masonry structures by using the finite element software, the author chooses the micro modeling which contain contact in this paper, simulated two solid brick wall test specimens and a rowlock cavity wall test specimen, the applicability of the model in the paper has been verified by compared the calculated results with the test results. Choosing the macro modeling, simulated three solid brick wall test specimens, and compared the calculated results with the test result; verified the correctness of the model.Vertical compressive stress and the wall height-width ratio is the main impact factor of unreinforced masonry structures’ seismic behavior. In order to study the effect factors on wall shear behavior, the author chose proven models to establish finite element model of the brick wall in different height-width ratio. For the same height-width ratio wall model, changing the vertical stress, the author discussed that vertical compressive stress how to influence cracking process and the shear strength of the wall; for different height-width ratio wall models, under different vertical stress, seismic performance which the whole process from cracking to destruction was analyzed, the rule that vertical compressive stress and height-width ratio influence of walls’cracking and strength was discussed, summaried the capability of seismic shear formula of the brick wall, which is a practical method either for enriching masonry structures’ basic theory or engineering design.