Seismic performance enhancement for low-rise and mid-rise steel frames using novel self-centering beam-to-brace links

IF 4.2 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering Pub Date : 2024-11-12 DOI:10.1016/j.soildyn.2024.109066

Shaoyuan Zhang , Hetao Hou , Yi Liu , Junjie Wang , Chunxue Dai , Bing Qu , Xinrui Fu

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引用次数: 0

Abstract

This paper aims to propose a novel self-centering beam-to-brace link with examined Shape Memory Alloy (SMA) based apparatuses to improve the seismic resilience of steel frames. Based on the past experimental data, a three-dimensional computer model of the proposed link was established to simulate the nonlinear hysteretic behavior. The results showed that the proposed link could realize the perceived advantages. A simplified Finite Element (FE) model was developed and validated via the comparison with the computer model. A 3-story and a 9-story representative building were rehabilitated with the proposed link. The Nonlinear Response History Analyses (NRHAs) were conducted on the original and rehabilitated systems to evaluate their seismic performance comparatively. To achieve a fair comparison, the original and rehabilitated systems had the proximate vibration periods and the same flexural strength under a roof drift ratio of 2 %. Compared with the original systems, the corresponding rehabilitated systems exhibited equivalent performance of transient inter-story displacement, significant advantages in eliminating residual deformation, and slight disadvantages in limiting floor acceleration. A comprehensive measure was developed and revealed the rehabilitated systems achieved superior seismic overall performance compared to the original systems.

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利用新型自定心梁与梁连接件提高中低层钢结构的抗震性能

本文旨在提出一种新型的自定心梁-支撑连接件，该连接件采用了经检测的基于形状记忆合金（SMA）的装置，以提高钢框架的抗震能力。根据过去的实验数据，建立了拟议连接的三维计算机模型，以模拟非线性滞回行为。结果表明，拟议的连接件可以实现预期的优势。通过与计算机模型的比较，开发并验证了简化的有限元（FE）模型。一栋 3 层和一栋 9 层的代表性建筑采用了所建议的连接装置进行了修复。对原有系统和修复系统进行了非线性响应历史分析 (NRHA)，以比较评估它们的抗震性能。为了进行公平比较，在屋顶漂移率为 2% 的情况下，原有系统和修复系统的振动周期相近，抗弯强度相同。与原有系统相比，相应的修复系统在瞬态层间位移方面表现出同等性能，在消除残余变形方面具有显著优势，而在限制楼层加速度方面则略显不足。综合测量结果表明，与原有系统相比，修复后的系统具有更优越的抗震综合性能。

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

Soil Dynamics and Earthquake Engineering 工程技术-地球科学综合

CiteScore

7.50

自引率

15.00%

发文量

446

审稿时长

8 months

期刊介绍： The journal aims to encourage and enhance the role of mechanics and other disciplines as they relate to earthquake engineering by providing opportunities for the publication of the work of applied mathematicians, engineers and other applied scientists involved in solving problems closely related to the field of earthquake engineering and geotechnical earthquake engineering. Emphasis is placed on new concepts and techniques, but case histories will also be published if they enhance the presentation and understanding of new technical concepts.