Separate Modeling Of Unreinforced Masonry Walls And Cracking Shape Simulation

There have been no standard experiment procedures and specimen size for theresearch of masonry mechanical properties due to the discreteness of materials usedin masonry structures and the diversity of methods for masonry construction,and nocommon accepted theories or explanation exist in terms of the construction relationfor masonry material under various stress conditions. With the revival of masonrystructure in modern times, the urgency of exploration related to mechanical propertiesof masonry structures is increasing continually.However modern masonry structuresmay show remarkable differences, not only in terms of material, masonry techniqueswill also aggravate the difference expansion.This article will undertake a special numerical analysis based on a mechanicsexperiments about unreinforced masonry walls designed by Jason Ingham, aprofessor working in the University of Auckland, which can be used in the research ofin-plane cracking characteristics of unreinforced masonry walls.The numerical resultsgained from them will be compared with each other finally. This research is mainlyused to evaluate the feasibility of models, and further explorations are conducted interms of the feasibility in various performance analysis about masonry walls.This article firstly introduce the research course of masonry numerical analysisand the development of research by means of comparing the pros and cons of separatemodels and homogenization models, then, further studies will be done about theformer one, namely the separate models, in two big ways, those are the theories aboutmasonry mechanics and the formulation of masonry models. It is assumed that thematerials used in masonry walls constructions present liner mechanical propertieswhile the interface junction between different materials present nonlinear mechanicalproperties. Due to the nonlinearity of material distribution and interface, masonrywalls present a nonlinearity to a large degree, particularly in the aspect of cracking.This article will utilize finite analysis software ANSYS as the tool for numericalcalculation and processing, accounting for different feasibilities, from threeperspectives.Force-Displacement curves of the three kinds of models will be deeplycompared with each other, which will also be compared with crack shape observed in actual tests to verify its rationality. Finally, the problems in terms of the combinationof the theories and models are discussed and summarized for detailed follow-upwork.