| Title |
Relation between Structural Weight and Lateral Displacements according to Drift Design based on Resizing Algorithms with Design Variable Linking Strategy |
| Authors |
Seo Ji-Hyun ; Park Hyo-Seon |
| Keywords |
resizing technique ; drift design ; high-rise buildings ; structural optimization ; weight control factors |
| Abstract |
The weight of building structures with respect to vertical loads, especially for the vertical structural elements, increases roughly linearly with height since the weight is proportional to the axial stresses. Also, it is well-known that the weight of structural system to resist lateral loads increases in nonlinear fashion with an increase in building height and slenderness ratio. For a given building height or slenderness ratio, the weight of structural system subjected to lateral loads depends on the degree of stiffness of the building structure. Therefore, drift design is one of the core techniques in the structural design of high-rise buildings. Resizing techniques are regarded as a practical drift design method of high-rise buildings because it doesn't require calculating sensitivity coefficients and recursive structural analysis. Resizing techniques re-distribute the structural weight on the basis of displacement participation factors to minimize the target displacement without the change of structural weights. In this paper, resizing techniques that can control the weight of the structure without deterioration of drift control performance is proposed by incorporating the weight control factor in the formulation of resizing algorithm. Based on the proposed drift design method, the relation between the structural weight and lateral displacement limit is investigated using the two examples. |