| Title |
Estimation on the Displacement Capacity of Coupled Shear Wall Designed by Strength-Based Design Method |
| Authors |
Seo Soo-Yeon ; Yoon Seung-Joe |
| Keywords |
Displacement capacity ; Strength-based design method ; Life-safety level ; Coupled shear wall ; Isolated shear wall |
| Abstract |
In this paper, the displacement capacity of shear wall designed by strength-based design method is evaluated at the life-safety level. A procedure to evaluate the displacement capacity of coupled shear wall is introduced through an evolution on the Sasani's study(1998). Six shear wall buildings (5, 10, and 15 story), three buildings with isolated shear walls and three buildings with coupled shear walls, are designed according to the strength-based design method(UBC 97). Using the proposed procedure, the displacement demand and capacity of these buildings are evaluated. For all cases, shear walls showed displacement capacities higher than demands as well as not exceeding the maximum drift limit, 0.02 (Vision 2000, 1995). In 5 story buildings, especially, this phenomenon was definitely clear. This means that the shear wall building can be designed to have too high displacement capacity when it is designed by the strength-based design method. On comparing with buildings with isolated shear walls and coupled shear walls, the former showed lower displacement demand and capacity than the latter. This change of displacement demand and capacity due to the coupling wall was maximized in 15 story buildings. From this, it is concluded that while the coupling walls can increase the strength and stiffness of building and reduce displacement demand, it also decreases the displacement capacity. |