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中南大学学报(自然科学版)

Journal of Central South University

第41卷    第4期    总第194期    2010年8月

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文章编号:1672-7207(2010)04-1514-08
玄武岩纤维加固震损混凝土框架节点的抗震性能
周运瑜1,余江滔1,陆洲导1,张克纯2

(1. 同济大学 结构工程与防灾研究所,上海,200092;
2. 江苏省无锡市高铁站商务区建设局,江苏 无锡,214105
)

摘 要: 基于三维钢筋混凝土框架节点试验(包括施加低周反复荷载预震损、灌缝修复处理、运用玄武岩纤维加固和施加低周反复荷载至节点破坏试验),研究玄武岩纤维对震损钢筋混凝土框架节点的加固效果。根据试验现象和试验数据,对不同三维框架节点的破坏模式、滞回曲线、骨架曲线、极限承载力、延性系数以及节点表面的玄武岩纤维的应变等参数进行对比分析。研究结果表明:运用玄武岩纤维加固的三维钢筋混凝土框架节点均实现了“强柱弱梁”的设计目标,破坏形态均为梁弯曲破坏形式,加固后节点的滞回曲线饱满,极限承载力和位移延性系数均有所提高,节点的抗震性能得到很大提高。

 

关键字: 玄武岩纤维加固;地震损伤;三维框架节点;损伤修复;抗震性能

Seismic behavior of BFRP-reinforced pre-damaged
 concrete beam-column joints
ZHOU Yun-yu1, YU Jiang-tao1, LU Zhou-dao1, ZHANG Ke-chun2

1. Research Institute of Structural Engineering and Disaster Reduction, Tongji University, Shanghai 200092, China;
2. Construction Bureau of High-Speed Railway Station of Business District in Wuxi, Wuxi 214105, China

Abstract:Based on the test of repaired column-beam joints (C-BJs) pre-damaged under low cycle reversed loading, seismic performance of the C-BJs strengthened with basalt fiber sheets was studied. The test procedures included pre-damage, rehabilitation, reinforcement with basalt fiber sheets and re-test under low cycle reversed loading. According to the test phenomena and test data, the failure modes, hysteresis curves, skeleton curves, ultimate bearing capacity, ductility and the strain of the basalt fiber sheets of different C-BJs were compared and analyzed. The test results show that the C-BJs strengthened with basalt fiber sheets exhibit strong column-weak beam failure mechanism. All connections fail due to the concrete crushing and rupture of longitudinal bars as a result of plastic hinges at the fixed beam end. The hysteretic curves of the C-BJs strengthened with basalt fiber sheets are full and show better energy dissipation. The reinforcement with basalt fiber sheets has a significant effect on increasing the ultimate bearing capacity and improving the displacement ductility and the seismic behaviors of the C-BJs.

 

Key words: basalt fiber reinforcement; seismic damage; 3D beam-column joint; rehabilitation of damage; seismic performance

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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