Effects of center-hung scoreboard on seismic responses of suspendome structure

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-04-12 DOI:10.1016/j.tws.2025.113313

Zhen Lu , Xiongyan Li , Suduo Xue , Yuanqing Wang , Caibao Liu

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引用次数: 0

Abstract

In order to investigate the effect of the center-hung scoreboard on the seismic response of the suspendome structure, a two-degree-of-freedom (2-DOF) series dynamic model was established based on the primary-secondary coupled effect. The dynamic response of the coupled system was then derived using the transfer function method. Subsequently, the MATLAB software was used to conduct a comprehensive investigation into the impact of various parameters, including the center-hung scoreboard, its lifting, and the site soil characteristic frequency, on the vertical and horizontal seismic responses of the suspendome structure. By comparing with the test results, the impact of different parameters on the dynamic response of the suspendome structure was obtained. Finally, the parametric analysis of the mass ratio and frequency ratio was carried out by using the verified stochastic seismic model of the primary-secondary coupled system. The characteristics and laws of the dynamic interaction between the center-hung scoreboard and the suspendome structure were found and summarized: the center-hung scoreboard increases the vertical seismic response of the primary structure. The center-hung scoreboard exerts a comparatively minor impact on the horizontal seismic response of the primary structure. The center-hung scoreboard lifting has little effect on the seismic response of the superstructure. From the perspective of acceleration and displacement, in order to realize the desired interactive damping of the center-hung scoreboard and suspendome structure, the frequency ratio β ≥ 4 should be guaranteed.

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中悬记分板对悬索结构地震反应的影响

为了研究中心悬挂记分牌对悬架结构地震反应的影响，建立了基于主次耦合效应的两自由度串联动力模型。然后利用传递函数法推导了耦合系统的动态响应。随后，利用MATLAB软件对悬架结构的竖向和水平地震反应进行了综合研究，研究了中心悬挂记分牌、其升力、场地土体特征频率等参数对悬架结构竖向和水平地震反应的影响。通过与试验结果的比较，得到了不同参数对悬架结构动力响应的影响。最后，利用经验证的主次耦合系统随机地震模型，对质量比和频率比进行了参数化分析。发现并总结了中挂记分板与悬架结构动力相互作用的特点和规律：中挂记分板增加了主结构的竖向地震反应；中心悬挂记分牌对主结构水平地震反应的影响较小。中心悬挂记分牌提升对上部结构的地震反应影响不大。从加速度和位移角度考虑，为实现中挂记分牌与悬架结构所需的交互阻尼，应保证频率比β≥4。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.