A novel damped braced tube system for tall buildings in high seismic zones
A novel damped braced tube system for tall buildings in high seismic zones
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一种适用于高地震区高层建筑的新型阻尼支撑管系统
DOI：
10.1002/tal.1926
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Takeuchi Toru
中科院分区：
文献类型：
--
作者：
Ishibashi Yoji;Terazawa Yuki;Tanaka Haruki;Yokoyama Ryo;Mizuno Hiroki;Takeuchi Toru
已知阻尼支腿系统在高度超过250 m的建筑物中有效地提供附加阻尼。然而，特别是对于日本东京市中心的超高层建筑，从中心核心到外部柱的伸臂桁架需要跨越超过20 m的距离。这增加了对悬臂梁的弯曲刚度需求，这导致更大的桁架深度，使得阻尼悬臂梁系统效率低下。对于这种具有大平面的高层建筑，提出了一种新的阻尼修改系统，即“阻尼支撑管系统”，其中弹性巨型支撑的外表面被部分垂直移除以产生裂缝，并被消能器（耗能装置）取代。阻尼支撑管系统增强了抗震性能，因为弹性巨型支撑的外表面与阻尼狭缝一起工作，就像在耦合墙系统中一样，并增加了整体阻尼比。本文以日本一个真实的工程为基础，建立了一个采用油阻尼器（简称粘滞消能器）的阻尼筒支撑体系的397 m超高层建筑的数值模型。以地震反应最小化为目标，进行了一系列基于广义反应谱的数值分析和优化。所提出的系统具有更好的阻尼性能，第一至第三模态阻尼比达到7%以上，同时提供了广泛的选择范围内的消能工的分布设计。最后，考虑到第一阶模态阻尼比和基本周期之间的权衡关系，建议裂缝基底的标高等于建筑物总高度的0.22。
The damped outrigger system is known to efficiently provide additional damping in buildings with heights of over 250 m. However, particularly for supertall buildings in the center of Tokyo, Japan, the outrigger truss from the center core to the exterior columns need to span distances of more than 20 m. This increases the flexural stiffness demand on the outrigger that leads to larger truss depths making the damped outrigger system inefficient. For such tall buildings with large plans, a new damping modification system, the “damped braced tube system” is proposed, where the exterior surface of the elastic mega braces are partially removed vertically to create a split and are replaced with dissipaters (energy‐dissipation devices). The damped braced tube system enhances the seismic performance as the exterior surfaces of the elastic mega braces work together with the damped slits like in a coupled wall system and increases the overall damping ratio. In this paper, numerical models were constructed based on a real project in Japan consisting of a 397‐m supertall building employing the damped tubular braced system using oil dampers (referred to as viscous dissipaters). A series of generalized response spectrum based numerical analyses and optimizations were performed to minimize the seismic response. The proposed system exhibited improved damping performance with the first to third mode damping ratios reaching to more than 7% while providing a wide range of options for dissipater distribution for design. Finally, the elevation of the slit's base is recommended to be equal to 0.22 of the total building height considering the trade‐off relationship between the first modal damping ratio and the fundamental period.
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DOI：
10.1002/tal.1554
发表时间：
2018
期刊：
The Structural Design of Tall and Special Buildings
影响因子：
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作者：
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DOI：
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发表时间：
2020
期刊：
Journal of Structural and Construction Engineering (transactions of Aij)
影响因子：
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DOI：
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发表时间：
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期刊：
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影响因子：
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考虑设计地震级别的油阻尼器或弹塑性阻尼器单阻尼支腿系统非线性动力响应特性
DOI：
10.3130/aijs.87.149
发表时间：
2022
期刊：
Journal of Structural and Construction Engineering (Transactions of AIJ)
影响因子：
--
作者：
TERAZAWA Yuki;ISHIBASHI Yoji;OMURA Hiroki;ASAI Tomoki;TAKEUCHI Toru
通讯作者：
TAKEUCHI Toru