t型桩空间梁-角柱连接抗震性能及损伤特征演变

IF 6.7 2区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY
Shixiang Xiao, Xin Bu, Bing Shen, Lidan Fan, Yifei Chen, Xinwu Wang
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引用次数: 0

摘要

本研究采用实验、数值和理论相结合的方法,系统地研究了带有t型桩的空间角柱节点的抗震性能和损伤机制。设计了两个具有不同t型桩配置的空间节点试件,评估其对节点抗震性能和损伤特征的影响,并进行了准静力试验。试验结果表明,t型短节的厚度对抗震性能有显著影响,在t型短节的腹板法兰连接处主要形成塑性铰,塑性应变分布明显。建立了参数化有限元模型,分析了翼缘和腹板厚度对节点抗震性能和损伤进展的影响,证实了更厚的腹板翼缘t型短段设计提高了节点的抗震能力。基于分量法原理的理论计算模型准确地预测了平面内长轴和小轴的初始转动刚度,与实验数据吻合良好。此外,对6种损伤指标模型进行了综合评价,验证了其预测损伤累积和破坏模式的有效性,为工程应用提供了理论支持。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Seismic performance and damage characteristics evolution of spatial beam to corner column connection with T-stubs
This study systematically investigates the seismic performance and damage mechanisms of spatial corner column joints with T-stubs using integrated experimental, numerical, and theoretical approaches. Two spatial joint specimens were designed with distinct T-stubs configurations to evaluate their influence on seismic behavior and damage characteristics, followed by quasi-static tests. Experimental results indicate that the thickness of T-stub significantly influences seismic performance, with plastic hinges predominantly forming at the web-flange junctions of T-stub, where distinct plastic strain patterns are observed. Parametric finite element models were developed to analyze the effects of flange and web thickness on joint seismic performance and damage progression, confirming that thicker web-flange T-stub designs enhance seismic capacity. A theoretical calculation model based on component method principles accurately predicts initial rotational stiffness in both major-axis and minor-axis in-planes, showing excellent agreement with experimental data. Additionally, a comprehensive evaluation of six damage index models validates their effectiveness in predicting damage accumulation and failure patterns, providing theoretical support for engineering applications.
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来源期刊
Journal of building engineering
Journal of building engineering Engineering-Civil and Structural Engineering
CiteScore
10.00
自引率
12.50%
发文量
1901
审稿时长
35 days
期刊介绍: The Journal of Building Engineering is an interdisciplinary journal that covers all aspects of science and technology concerned with the whole life cycle of the built environment; from the design phase through to construction, operation, performance, maintenance and its deterioration.
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