Experimental And Simulation Analysis Of Brick Walls’ Failure Modes

This master’s thesis is a part of the National Natural Science Foundation projects (approval number is50978177). The brick wall test pieces’earthquake failure modes loaded at different heights and different aspect ratio is studied through the study in experiment and simulation analysis in this article respectively.Static reciprocating test method is used to observe the wall’s destruction process according to the brick masonry’s stress situation under earthquake effect in detail; according to structural form of the pier between two windows, isolation of seam is set between windowsill and pier, brick wall’s test specimen is devised and made, set up, loading scheme is formulated; experiment phenomenons are observed and recorded during the testing process, the test data is processed according to experiment phenomenons and on-spot record. The wall’s ultimate flexural capacity is represented by the test specimen’s ultimate load value which known from the test data and experiment phenomenons’ analysis; the test specimen’s certain shear capacity reserves before destruction is known from the comparison of test results and result calculated with formulas; this test specimen’s good ductility is known from displacement-horizontal load curves and skeleton curve.The finite element models which accord with elastic-plastic is founded with the help of Marc software on the basis of the test specimen’s mode of construction and loading method; changing loading height and depth-width ratio respectively and founding models compared with the fist finite model on the basis of the first finite model with the purpose of realizing constructive analysis.The smaller loading height, the larger horizontal force need to produce same bending moment, which is known from comparing with the displacements, longitudinal bar strains, damping ratios, ductility factors, horizontal load, ultimate bearing capacity coming from the two models with different loading heights.The wall’s horizontal ultimate load decreasing and then showing bending failure mode after partitioning off the windowsill and pier with isolation of seam, and the low ductility factor of the model without isolation of seam whose ultimate shear bearing capacity is represented by horizontal ultimate load and then showing shear failure mode is known from comparing with the displacements, longitudinal bar strains, damping ratios, ductility factors, horizontal load, ultimate bearing capacity, final failure mode coming from the two models with different depth-width ratio.The forward direction ultimate load getting from finite element analysis and test results are about and about which is known from comparing the test results and relevant finite element model whose final failure mode are all bending failure; through the contrast, it is known that, there is considerable difference between the damping ratios, ductility factor coming from finite element analysis which could only compare with each other during the finite element models and that coming from the test results.