利用曲线构件对钢柱基座进行低扰动抗震改造方法的研究

IF 0.8 0 ARCHITECTURE Japan Architectural Review Pub Date : 2024-01-04 DOI:10.1002/2475-8876.12429
Kun-Sian Lin, Masahiro Kurata, Yutaro Kawasaki, Yoshio Kitatani
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引用次数: 0

摘要

近年来,抗震改造一直是一个非常重要的课题。然而,一般的改造技术,如荷载抵抗系统、阻尼装置和隔震系统等,都会对结构系统造成相当大的干扰,如增加受力需求等,而且在施工期间,建筑内的住户需要临时搬迁。本研究提出了一种利用曲线构件优势的钢柱底座低干扰改造方法设计,以提高抗震性能并减少上述缺点。首先通过初步建模对曲线构件改造系统的基本机制进行了分析评估,随后进行了参数研究,以验证其有效形状。在不同的制造工艺和边界条件下,对四个弯曲构件试样进行了测试。根据测得的响应,对试件的整体行为、强度骨架和变形形状等几个方面进行了检查。经验证,曲面构件改造系统的滞后性能可实现稳定的循环行为,且强度退化有限。通过开发具有良好一致性的数值模型,建立并验证了一套用于估算侧向荷载的物理方程,使其能够准确地代表试验中的测量响应。
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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Investigation of low-disturbance seismic retrofit method for steel column bases using curved members

Seismic retrofit has always been a very important subject in recent years. However, typical retrofit techniques such as load-resisting systems, damper devices, and seismic isolation systems will cause considerable disturbances to the structural system, such as increased force demand, and the building's occupants will need to be temporarily relocated during the construction. A design of the low-disturbance retrofit method for steel column bases that uses the advantages of the curved member has been proposed in the study to improve seismic performance and reduce the mentioned demerits above. The basic mechanism of the curved member retrofit system was first analytically evaluated by preliminary modeling, followed by a parametric study to verify the effective shape. Four curved member specimens were tested with variations in fabrication processes and boundary conditions. Several aspects, including overall behavior, strength backbones, and deformation shapes of the specimens, were examined upon measured responses. The hysteretic performance of the curved member retrofit system is verified to achieve a stable cyclic behavior with limited strength degradation. A set of physical equations for estimating the lateral loads were established and verified by developing numerical models with a good agreement that enabled them to accurately represent the measured responses in the test.

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来源期刊
CiteScore
1.20
自引率
11.10%
发文量
58
审稿时长
15 weeks
期刊最新文献
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