Page 249 - 《振动工程学报》2025年第8期
P. 249
第 38 卷第 8 期 振 动 工 程 学 报 Vol. 38 No. 8
2025 年 8 月 Journal of Vibration Engineering Aug. 2025
后置翼墙法加固弱节点型 RC 框架试验研究
李曰兵 1,2 , 王 航 , 严 琪 , 单 良 , 邢 爽 1,2
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(1. 东北电力大学建筑工程学院,吉林 吉林 132012;
2. 东北电力大学吉林省电力基础设施安全评估与灾害防治重点实验室,吉林 吉林 132012;
3. 中广核工程有限公司,广东 深圳 518000; 4. 中国电建集团吉林省电力勘测设计院有限公司,吉林 长春 130022)
摘要: 国内外震害表明,大量钢筋混凝土(RC)框架建筑梁‑柱节点或柱发生严重破坏,未能形成设计期望的梁端铰破坏机制。
在柱内侧增设 RC 翼墙,能够同时加固既有框架的柱和节点,促进梁铰机构形成,是一种简单有效的加固方式。本文制作两个
1/2 缩尺的钢筋混凝土框架,并对其中一个采用后置翼墙法进行抗震加固。通过拟静力试验,研究了两试件的滞回性能、变形
能力、耗能能力及破坏模式等抗震性能。结果表明,加固后框架的的刚度、承载力和耗能能力得到了显著提升,试件由节点剪
切破坏转变为理想的梁屈服破坏,验证了在节点抗剪承载力严重不足的极端情况下,通过增设翼墙加固既有钢筋混凝土框架
的可行性和有效性。
关键词: 钢筋混凝土; 框架结构; 抗震加固; 后置翼墙; 梁‑柱节点; 拟静力试验
中图分类号: TU375.4 文献标志码: A DOI:10.16385/j.cnki.issn.1004-4523.202308022
Experimental study on RC frame with weak joints by wing wall
strengthening method
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1,2
LI Yuebing , WANG Hang , YAN Qi , SHAN Liang , XING Shuang 1,2
(1.School of Civil Engineering and Architecture, Northeast Electric Power University, Jilin 132012, China;
2.Key Lab of Electric Power Infrastructure Safety Assessment and Disaster Prevention of Jilin Province,
Northeast Electric Power University,Jilin 132012, China; 3.China Nuclear Power Engineering Co., Ltd.,
Shenzhen 518000, China; 4.POWERCHINA Jilin Electric Power Engineering Co., Ltd., Changchun 130022, China)
Abstract: Recent earthquake damage investigations found that a large number of reinforced concrete frame buildings were heavily
destroyed at beam-column joints and columns, without forming the beam-hinging mechanism expected in the design. Installing rein‑
forced concrete wing walls beside the existing columns remains a fundamental and effective strengthening method, by improving
seismic performance of both the columns and the joints, while promoting a beam-yielding mechanism. Two 1/2-scale frame speci‑
mens were manufactured, and one of them was strengthened by post-installation wing wall. By quasi-static tests, hysteretic behav‑
iour, deformation capacity, energy dissipation power and failure mode of the two specimens were examined. The results show that
the stiffness, bearing capacity and energy dissipation capacity of the strengthened frame were significantly improved. After strength‑
ening, failure mode of the frame was changed from joints shear failure to expected beam-hinging. The efficiency and applicability of
wing wall installation method were validated for strengthening existing frame structure buildings with seriously weak beam-column
joints.
Keywords: reinforced concrete; frame structure; seismic strengthening; wing wall; beam-column joint; quasi-static test
钢筋混凝土框架结构因受力传递路径清晰、结 部位 。但在众多国内外震害调查中发现,许多建
[2]
[1]
构布置灵活等优点而得到广泛应用 。梁‑柱节点 筑的节点发生严重破坏,甚至导致结构发生倒塌。
是连接框架梁、柱以及上、下层之间传力的关键部 如图 1 所示,由受灾建筑中裸露的节点区配筋
位,起着传递和分配内力、保证结构整体性的作用, 可见,众多 RC 框架结构建筑的梁‑柱节点区少配置
节点核心区是保证框架承载力和抗倒塌能力的关键 甚至未配置箍筋,导致节点区率先发生剪切破坏 [2‑5] 。
收稿日期: 2023-08-10; 修订日期: 2023-10-31
基金项目: 吉林省科技发展计划项目(20200801010GH)

