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首页> 外文期刊>Structural Design of Tall Buildings >Outrigger system analysis and design under time-dependent actions for super-tall steel buildings
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Outrigger system analysis and design under time-dependent actions for super-tall steel buildings

机译：高层钢结构时变作用下的支腿系统分析与设计

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摘要

The outrigger system has been widely adopted as an efficient structural lateral-load resisting system for super-tall buildings in recent years. Although the outrigger system has many structural advantages, it has a significant defect due to differential shortening, which cannot be neglected. Due to the shrinkage and creep of concrete, as well as the differential settlement of foundation, the shortening of the structural member is an important time-dependent issue, which leads to additional forces in the outriggers after the lock-in of the outriggers. As a result, it will increase the size of the structural member cross section in the design. In a real project, engineers can delay the lock-in time of the outrigger system to release the additional forces caused by the differential shortening during the construction phase. The time-dependent actions, such as the column shortening and the differential settlement of the foundation, were estimated. A mega frame steel structure was employed to illustrate the analysis and design of the outrigger under the time-dependent actions. Furthermore, a simple optimal method, considering the structural stability and overall stiffness, was proposed to optimize the construction sequence of the outrigger system.
机译：近年来，支腿系统已被广泛用作超高层建筑的有效结构侧向抗力系统。尽管支腿系统具有许多结构优势，但由于差异缩短而具有明显的缺陷，不能忽略。由于混凝土的收缩和蠕变以及地基的不均匀沉降，结构构件的缩短是一个重要的时效问题，在支腿锁定后，支腿会产生附加力。结果，它将增加设计中结构构件横截面的尺寸。在实际的项目中，工程师可以延迟支腿系统的锁定时间，以释放在施工阶段由差异缩短引起的额外作用力。估计了与时间有关的动作，例如缩短柱和基础的差异沉降。采用巨型框架钢结构来说明支腿在时变作用下的分析和设计。此外，提出了一种考虑结构稳定性和整体刚度的简单优化方法，以优化支腿系统的施工顺序。

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