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为了解决既有高层建筑结构增设大跨度悬挑梁所面临的问题,采用了体内外同索预应力技术进行悬挑梁设计,不仅提高了悬挑梁根部的抗裂性,而且还对既有结构边跨梁端负弯矩区实现了加固。本文结合工程实例探讨了体内外同索预应力技术进行大跨悬挑梁的设计和计算方法。实践证明,本文方法是切实可行的,并具有一定的优越性。
In order to solve the problems faced by the addition of large-span cantilevered beams in high-rise building structures, the in-vivo and external-cable prestressing techniques were used to design cantilevered beams, which not only improved the crack resistance of the cantilever beam but also had The structure has been strengthened by the negative bending moment region of the side span beam. In this paper, the design and calculation methods of long-span cantilevered beams with prestressing technique in-line and in-out are discussed in combination with engineering examples. Practice has proved that this method is feasible and has certain advantages.