| 摘要 |
<p>In its optimal form this building possesses a streamlined aerodynamic profile in one direction and convex shaped shell type closure components in the orthogonal direction .The system's main load carrying member, the truncated ellipse structural rib provides most of the streamlined aerodynamic profile and the rest is provided by concave surfaces connected externally to the rib's extremities. Where possible, the ribs are aligned with the anticipated direction of maximum wind velocity. Gravity loads induce vertical and horizontal foundation reactions. When the truncation points with their foundations are suitably located, the horizontal forces are directed towards the center of the rib. The rib then behaves like a closed elliptical ring capable of resisting substantial in plane forces. Under wind loading this building attracts much less wind force than a conventionally shaped building. This invention focuses on the building's ability to attract low wind forces while providing very long clear spans.</p> |
