多层传统塔式建筑的振动台试验和数值分析

IF 4.3 2区 工程技术 Q1 ENGINEERING, CIVIL
Huaiquan Ling, Jianyang Xue, Liangjie Qi
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引用次数: 0

摘要

传统塔式建筑(TTSB)是现代城市中模仿古代木塔整体外观建造的一种创新结构形式,是一种极具文化内涵的高层建筑。由于抗震设计规范对高层 TTSB 的规定有限,要评估这种独特结构在强震下的可靠性能十分困难。本文介绍了一个 1/15 比例的 13 层 TTSB 试样的振动台试验和数值分析,该试样的塔楼整体高度为 5.36 米,为钢框架支撑核心筒结构,由 7 层明亮楼层(外部可见的已建楼,BF)和 6 层昏暗楼层(外部不可见的内置楼,DF)组成,外围设有过渡柱和加劲桁架。实验结果表明,测试的塔式建筑具有出色的抗震性能和可靠的结构完整性。在承受极高烈度的运动时,它只出现了轻微的损坏。采用偏心钢支撑的核心筒区域在剧烈激励下的层间漂移、动态应变和楼层加速度响应比采用十字中心对称钢支撑的核心筒区域更为显著。在垂直加速度作用下,塔楼上层的垂直反力增大,试验后中层和上层的动力响应差异更加明显。此外,还建立了测试塔楼的三维数值模拟模型,并根据测试响应进行了验证。随后,利用验证后的数值模型研究了不同楼层过渡柱对层间漂移峰值响应和相关应变分布的影响,最后提出了过渡柱的合理位置建议。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Shaking table test and numerical analyses of a multi-story traditional tower-style building

The traditional tower-style building (TTSB) is an innovative structural form constructed in modern cities imitating the overall appearance of ancient timber pagodas, and it is an extraordinarily cultured high-rise construction. The limited stipulations for high-rise TTSBs in the seismic design code pose challenges in assessing the reliable performance of the unique structure subjected to severe earthquakes. This paper presents the shaking table test and numerical analyses of a 1/15-scale 13-story TTSB specimen with an integral tower height of 5.36 m, which is a steel frame-braced core-tube structure consisting of seven bright floors (built-out stories evident from the outside, BF) and six dim floors (built-in stories not apparent from the outside, DF), with transition columns and stiffening trusses around the exterior perimeter. The experimental results showed that the tested tower-style building had excellent seismic performance and reliable structural integrity. It only experienced minor damage when subjected to extremely high-intensity motions. The interstory drift, dynamic strain, and floor acceleration response of the core-tube region with eccentric steel braces were more significant under severe excitation than those with cross-centered symmetric steel braces. The vertical reaction increased at the upper floor of the tower under vertical acceleration, and differences in the dynamic response of the middle and upper floors were much more apparent after the test. Moreover, 3D numerical simulation models of the tested tower were established and validated against the test responses. Successively, the validated numerical model was used to investigate the influence of the transition column at different floors on the peak interstory drift response and the relevant strain distribution, and the proposal for a proper position of the transition column was recommended at the end.

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来源期刊
Earthquake Engineering & Structural Dynamics
Earthquake Engineering & Structural Dynamics 工程技术-工程:地质
CiteScore
7.20
自引率
13.30%
发文量
180
审稿时长
4.8 months
期刊介绍: Earthquake Engineering and Structural Dynamics provides a forum for the publication of papers on several aspects of engineering related to earthquakes. The problems in this field, and their solutions, are international in character and require knowledge of several traditional disciplines; the Journal will reflect this. Papers that may be relevant but do not emphasize earthquake engineering and related structural dynamics are not suitable for the Journal. Relevant topics include the following: ground motions for analysis and design geotechnical earthquake engineering probabilistic and deterministic methods of dynamic analysis experimental behaviour of structures seismic protective systems system identification risk assessment seismic code requirements methods for earthquake-resistant design and retrofit of structures.
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