STUDY OF NONLINEAR ANALYSIS METHOD FOR MASONRY BASED OPENSEES

The finite element analysis of masonry structures has always been complex and difficult to ensure its accuracy． To avoid the difference of the stiffness by using the equivalent framework to simplify and analyse the masonry，the single bending deformation adjustment factor α and single shear deformation adjustment factor β were used to adjust the stiffness of the structure，which was verified from theoretical analysis and simulation，showing that the introduction of the adjustment factors was accurate and reasonable to do the nonlinear numerical analysis of the masonry． The result also showed that using shear deformation adjustment factor was superior to bending adjustment factor in precision of simulating．