The core system in building structure that is composed only of reinforced concrete walls and slabs are adopted on many high-rise apartment buildings constructed recently in Korea. And the framed structure with shear wall core that can effectively resist horizontal forces is frequently adopted for the structural systems for high-rise building structures.
The current analysis method commonly used for the analysis of the coupled wall system can not correctly evaluate the structural behavior when 2-DOF membrane elements is connected to 3-DOF beam element. Thus, the current analysis method has the incompatibility problem between beam element and shear wall element.
In this study, using the membrane elements with drilling degree of freedom (NMD4) the incompatibility problem between beam element and shear wall element in the analysis of coupled shear wall and frame-shear wall interaction can be solved.
Shear wall structures are modeled by NMD4(4-node Nonconforming Membrane element with Drilling degrees of freedom) element, which are the defect-free membrane element with 3 degrees of freedom per a node. Beams are modeled by in-plane beam finite elements with 3 DOF.
The developed finite element models for the analysis of coupled shear wall system are validated through comparisons with test results of a number of analytical models, various mesh grading is presented to show the efficiency of the variable node elements.
