[1]朱虹,张赟,周臻,等.L形FRP粘贴法加固混凝土框架梁负弯矩区试验研究[J].东南大学学报(自然科学版),2013,43(5):905-911.[doi:10.3969/j.issn.1001-0505.2013.05.001]
 Zhu Hong,Zhang Yun,Zhou Zhen,et al.Experimental study on strengthening of negative moment region of RC frame beams by L-shaped FRP bonding method[J].Journal of Southeast University (Natural Science Edition),2013,43(5):905-911.[doi:10.3969/j.issn.1001-0505.2013.05.001]
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L形FRP粘贴法加固混凝土框架梁负弯矩区试验研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
43
期数:
2013年第5期
页码:
905-911
栏目:
土木工程
出版日期:
2013-09-20

文章信息/Info

Title:
Experimental study on strengthening of negative moment region of RC frame beams by L-shaped FRP bonding method
作者:
朱虹1张赟2周臻1陈昊阳1
1东南大学混凝土及预应力混凝土结构教育部重点实验室, 南京 210096; 2江苏省住房和城乡建设厅科技发展中心, 南京 210036
Author(s):
Zhu Hong1 Zhang Yun2 Zhou Zhen1 Chen Haoyang1
1Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096, China
2Science and Technology Development Center, Jiangsu Housing and Urban-Rural Development Department, Nanjing 210036, China
关键词:
L形FRP 加固 负弯矩区 受弯性能 锚固
Keywords:
L-shaped fiber reinforced polymer(FRP) strengthening negative moment region flexural performance anchoring
分类号:
TU375.4
DOI:
10.3969/j.issn.1001-0505.2013.05.001
摘要:
提出了一种混凝土框架梁负弯矩区受弯性能加固的L形FRP片材粘贴加固法,该方法利用角钢实现FRP在梁柱阴角处的转向锚固.通过6个足尺框架梁柱边节点试件的单向静力加载和低周反复加载试验,对比了利用L形FRP粘贴加固法和规范建议FRP粘贴加固法加固后梁的破坏形态、受弯承载力、刚度、延性、耗能能力等性能指标.试验结果表明,粘贴L形FRP片材加固后,梁根部FRP与试件相应位置截面在加载过程中变形协调,应变关系基本符合平截面假定.低周反复荷载作用下,梁受弯承载力和刚度的提高幅度与静力荷载作用下几乎相同,表明L形FRP粘贴加固法中的锚固装置完全限制了阴角处FRP片材从被加固体基面上法向剥离的位移趋势,使得加固效果更加稳定.
Abstract:
The L-shaped fiber reinforced polymer(FRP)bonding method for enhancing the flexural performance of negative moment region of RC beams is proposed, in which angle steel is settled to anchor FRP sheet at the frame joint. Six full scale frame joint specimens were tested under static load or low frequency cyclic load. Then, the failure mode, flexural capacity, stiffness, ductility and energy dissipation ability were compared between the RC beams strengthened by the proposed L-shaped FRP bonding method and those strengthened by the recommended method in current specification. The experimental results show that by the L-shaped FRP bonding method, deformation coordination between the FRP at the beam root and the corresponding section of the frame beam are achieved in the process of loading, and thus the stress-strain relationship basically agrees with the plane cross-section assumption. Under low frequency cyclic load, the increase of flexural capacity and stiffness of the beam are almost the same as those under the action of static loads. The trend of FRP debonding vertically from the surface of concrete can be completely restricted by the anchor device and thus more stable strengthening effect is achieved.

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备注/Memo

备注/Memo:
作者简介: 朱虹(1975—),女,博士,副教授,seuzhuhong@gmail.com.
基金项目: 国家高技术研究发展计划(863计划)资助项目(2012AA03A204)、江苏省建筑业科研资助项目(JG2007-16).
引文格式: 朱虹,张赟,周臻,等.L形FRP粘贴法加固混凝土框架梁负弯矩区试验研究[J].东南大学学报:自然科学版,2013,43(5):905-911. [doi:10.3969/j.issn.1001-0505.2013.05.001]
更新日期/Last Update: 2013-09-20