| dc.description.abstract | The September 11, 2001 events attracted the attention of civil engineers of the world to the problem of safety of towers and skyscrapers. According to recent studies, the WTC collapse was caused by man-made explosions on a critical floor located much lower than the floors hit by terrorist planes which supports the wide-spread rumor in the U.S. that MASAD agents used the aftermath mess-up after the crush of the planes, put some explosives in the critical floor and detonated them in a while. These or any other possible calamities must be technically treated which can be achieved by drastic increase of safety factor of tower design. In the present paper a new approach to the optimal design of towers is advanced based on the principle of equistrength. Introductive Section 1 provides a short overview of the theory of equistrong structures given in the book by Cherepanov and Ershov (1977). In Section 2, a continuum model is used for the design of equistrong towers. The same problem is studied in Section 3 with an account of the discrete, floor-by-floor structure of equistrong towers. Conclusion emphasizes that the equistrong tower designs allow developers to achieve the maximum possible safety factor. Current designs of skyscrapers including WTC towers are as primitive as the Tower of Babylon. | ru |
