Detailed Modeling Method On Masonry And Quasi-static Experimental Numerical Simulation Analysis Of Masonry

This paper, based on quasi-static experiment of masonry wall between windows, mainly explores and researches the separated modeling method of masonry structure, which is in line with the actual more. On the basis of this, two kinds of modeling methods are used to simulate masonry wall between windows, maily compared and analyzed from failure patterns, hysteretic behavior and ductility, to explore two modeling methods respective advantages and disadvantages;two-story unreinforced masonry structure is simulated and analysed by using integral modeling method, to investigate the applicability of the modeling method for the analysis of the entire structure.First, expounding the long development history of masonry structure, the development status of the present and the development direction of the future masonry structure; analysing the characteristics of the earthquake damage of masonry structure; aiming at the deficiencies in the research field of masonry structure at present, putting forward the problems, content and purpose of the research in this paper.Second, in view of powerful structure analysis ability of the ABAQUS finite element software, which is used to simulate and analyse the masonry structure; masonry materials and concrete material properties are defined by the concrete damaged plasticity model, setting the parameters neeeded to input. On the basis of this, the numerical simulation is carried out to verify the rationality of the constitutive model.Third, the effect of mortar is simulated by establishing the interface contact criterion between the solid element interface; the operation mechanism of interface contact criterion is expounded, including normal and tangential behavior; numerical simulation was conducted to verify the operation mechanism and the rationality of the defined parameters; the separated modeling method is used to simulate masonry structure, failure modes of masonry members is simulated and analysed from the uniaxial compression(including axial compression and eccentric compression and uniaxial tensile(including the dentiform destruction, failure along the block and failure along the horizontal seam), and simulating and anlysing the energy dissipation capacity of masonry member under repeated load.Fourth, based on the quasi-static experiment of masonry wall, the numerical simulation analysis is carried out by using separate modeling method and integral modeling method, which mainly analyse the shear failure mode, hysteresis curve, skeleton curve, ductility and so on. Then, the application scopes and limitations of the two modeling methods are discussed.Fifth, according to the experiment project of the literature, a two-story masonry structure designed, which is simulated by using integrated modeling method. The main failure modes of the entire structure is simulated and analysed in two mutually perpendicular horizontal earthquake, which compares with the results of the experiment.