Abstract
Recently, several high-rise RC buildings with a core wall have been designed and constructed. Due to demands of architectural planning, these core walls often become open section walls. Bending and shear loading tests and analyses were conducted for evaluating the structural capacities of the open section core walls. Major conclusions obtained from the tests and the analyses are as follows ; 1. In designing and analyzing the open section core walls, their loading directions must be taken into consideration since their structural behavior varies largely with the loading directions. 2. The test results can be well simulated by a fiber model bending analysis based on the linear strain assumption. 3. The lateral displacement which is calculated by a fiber model bending analysis, adding the shear displacement as well as the displacement caused by slip away from the foundation, can simulate the test results. 4. The ultimate bending strength for the core wall calculated by a fiber model analysis assuming the limitation of 0.3% concrete strain or 1.0% longitudinal rebar strain, can estimate conservatively the test results. 5. The required design ductility of the core wall can be obtained by confining the compression area concrete of a wall-column by lateral reinforcements. The required design curvature corresponding to the allowable lateral displacement, is assured by the proposed calculation method using a fiber model analysis. The results from this method can simulate conservatively the test results.
