A NEW TYPE OF MULTI-VERTICAL-LINE-ELEMENT MODEL OF SHEAR WALLS: PRINCIPLE AND APPLICATION

Based on the classical beam theory, a new type of multi-vertical-line-element model of shear walls is proposed. The transverse displacement function of the new model is cubic along longitudinal direction. In stiffness matrix, the interaction of axial deformation, bending deformation and shear deformation is considered. Four vertical springs are used in longitudinal direction of the element, so the longitudinal normal strain is fitted by four constant normal strains. The calculation accuracy is not affected by the increase of aspect ratio nearly, thus the calculation speed is imporved due to the small number of elements. Good accuracy is achieved under various load combinations. Finally, an example shows that the model can yield good accuracy and can be used in the elastic-plastic static analysis and dynamic analysis of high rise building structures.