Wada konstrukcyjna, która niemal zmiotła z powierzchni ziemi wieżowiec w Nowym Jorku

@PalNick To jakiś nabijacz wyświetleń tej stronie? To niby tłumaczenie, ale nie ma linku do oryginału.... :pirate_flag: Poza trym strona bez https..... Jak bym tego nie piorunował.

@PalNick

Wada konstrukcyjna, która niemal zmiotła z powierzchni ziemi wieżowiec w Nowym Jorku

Fajnie, ale nie:

Ultimately, the retrofitting may not have been necessary. A NIST reassessment using modern technology later determined that the quartering wind loads were not the threat that LeMessurier and Hartley had thought. They recommended a reevaluation of the original building design to determine if the retrofitting had really been warranted.[3] It is not clear whether the NIST recommended reevaluation was ever conducted, although the question is only an academic one, since the reinforcement had been done - https://en.m.wikipedia.org/wiki/Citicorp_Center_engineering_crisis

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Swoja drogą, poleganie na aktywnym elemencie do stabilizacji budynku jest takie trochę…

Citicorp Center engineering crisisIn July 1978, a possible structural flaw was discovered in Citicorp Center, a skyscraper that had recently been completed in New York City. Workers quietly made repairs over the next few months. The building, now known as Citigroup Center, occupied an entire block and was to be the headquarters of Citibank. Its structure, designed by William LeMessurier, had several unusual design features, including a raised base supported by four offset stilts and a column in the center, diagonal bracing which absorbed wind loads from upper stories, and a tuned mass damper with a 400-ton concrete weight floating on oil to counteract oscillation movements. It was the first building that used active mechanical elements (the tuned mass damper) for stabilization. Concerned about "quartering winds" (wind directed diagonally toward the corners of the building rather than perpendicular to a wall) an undergraduate engineering student from Princeton University, Diane Hartley...Wikipedia

A potem spawacze w nocy spawali konstrukcję w działającym budynku.