A tuned mass damper is a heavy mass, usually steel or concrete, mounted near the top of a tall building and tuned to swing against the structure's natural sway. By moving out of phase with wind or earthquake motion, it absorbs vibration energy and keeps the building stable and comfortable....
Skyscrapers stay up because two systems work together: a deep foundation that transfers the building's weight to firm soil or bedrock, and a stiff vertical skeleton of columns, cores, and frames that resists wind and earthquake forces. Every load, from gravity to a typhoon gust, follows a continuous path down...
The Chicago School of architecture was a group of architects and engineers working in Chicago between the 1880s and roughly 1910 who developed the steel-frame skyscraper. Their commercial buildings used metal skeletons instead of thick masonry walls, large plate-glass windows, and restrained ornament, laying the technical and visual groundwork for...
