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Stress development of a supertall structure during construction : field monitoring and numerical analysis

机译:超高层建筑施工过程中的应力发展:现场监测与数值分析

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摘要

The safety of the 610 m Guangzhou New Television Tower, due to become China's tallest structure on completion, is an issue that concerns many parties because of the lack of sufficient experience, official design codes, and construction guidelines for such a skyscraper. This article investigates the strain/stress development of this supertall structure through the integration of finite element analysis and field monitoring during the construction stage with a particular focus on the following issues: (1) the shrinkage and creep properties of high-strength low-shrinkage concrete; (2) the strain response of the structure to extreme events including typhoons, a major earthquake, and unfavorable construction loads; and (3) the stress evolution of the supertall structure as construction activity progresses. Field monitoring results demonstrate that the strain responses of the structure to natural hazards are within safe ranges. Finite element model predictions made at different stages of construction are in good agreement with measurement data. The monitoring exercise described in this article provides the designer, the contractor, and the client valuable data regarding the safety of the tower. It verifies the effectiveness and importance of monitoring during the construction phase for such a complex supertall structure.
机译:610 m的广州新电视塔建成后将成为中国最高的建筑物,其安全问题因缺乏足够的经验,官方设计规范以及此类摩天大楼的施工准则而引起了许多各方的关注。本文通过在施工阶段将有限元分析与现场监测相结合来研究这种超高层结构的应变/应力发展,特别关注以下问题:(1)高强度低收缩率的收缩和蠕变特性具体; (2)结构对极端事件的应变响应,包括台风,大地震和不利的建筑荷载; (3)随着施工活动的进行,超高层结构的应力演化。现场监测结果表明,该结构对自然灾害的应变响应在安全范围内。在施工的不同阶段进行的有限元模型预测与测量数据非常吻合。本文中描述的监视工作为设计人员,承包商和客户提供了有关塔楼安全性的宝贵数据。它验证了在如此复杂的超高层建筑施工阶段进行监控的有效性和重要性。

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