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[1]陈春,胡夏闽,韦尘雨.碳纤维增强复合材料增强胶合木-混凝土组合梁静力试验[J].南京工业大学学报(自然科学版),2015,37(06):75-80.[doi:10.3969/j.issn.1671-7627.2015.06.014]
 CHEN Chun,HU Xiamin,WEI Chenyu.Experimental study on glulam-concrete composite beams strengthened with carbon fiber reinforced composite[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2015,37(06):75-80.[doi:10.3969/j.issn.1671-7627.2015.06.014]
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碳纤维增强复合材料增强胶合木-混凝土组合梁静力试验()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
37
期数:
2015年06期
页码:
75-80
栏目:
出版日期:
2015-11-20

文章信息/Info

Title:
Experimental study on glulam-concrete composite beams strengthened with carbon fiber reinforced composite
文章编号:
1671-7627(2015)06-0075-06
作者:
陈春胡夏闽韦尘雨
南京工业大学 土木工程学院,江苏 南京 211800
Author(s):
CHEN ChunHU XiaminWEI Chenyu
College of Civil Engineering,Nanjing Tech University,Nanjing 211800,China
关键词:
胶合木-混凝土组合梁 CFRP 界面滑移 承载力
Keywords:
glulam-concrete composite beam CFRP interface-slip flexural capacity
分类号:
TU398.9
DOI:
10.3969/j.issn.1671-7627.2015.06.014
文献标志码:
A
摘要:
为了研究碳纤维增强复合材料(CFRP)增强胶合木-混凝土组合梁在静荷载作用下的受力性能,进行了4根完全剪力连接胶合木-混凝土简支组合梁的试验,其中1根为未增强组合梁,3根为不同CFRP增强程度的组合梁,考察了CFRP增强胶合木-混凝土组合梁的变形发展过程与破坏形态,得到了试件跨中的荷载-挠度曲线、胶合木梁与混凝土翼板交界面的荷载-滑移曲线、试件跨中沿截面高度方向的纵向应变分布、试件剪跨段混凝土板横向应变分布,并分析了CFRP增强程度对组合梁受弯承载力以及挠度的影响。结果表明:CFRP可延缓胶合木-混凝土组合梁的受拉脆性破坏,降低木材缺陷对组合梁受弯性能的影响,充分利用混凝土的抗压强度并显著提高胶合木-混凝土组合梁的承载力和刚度。
Abstract:
To investigate the bending behavior of glulam-concrete composite beams strengthened with carbon fiber reinforced composite(CFRP)under static load,four glulam-concrete composite beams with full connection were tested.These beams included one specimen without CFRP and other three specimens strengthened with different numbers of CFRP layers,and the deformation and failure pattern of the composite beams were observed.The force-deflection curves of mid-span,load-slip at the end of specimens,longitudinal strain distribution along depth of the composite section at mid-span,and transverse strain distribution of concrete flange in composite beams were obtained.Flexural capacity and the rigidity of composite beams were studied considering the factors of the numbers of reinforcement layers.The observation from the experiments indicated that the brittle failure pattern of composite beam was changed as the ductile failure pattern of composite beams strengthened with CFRP.Also,the strengthening of composite beams by CFRP decreased the influence of defects in timber on the flexural behaviors,and the CFRP strengthening could use of compression strength of concrete.The bending stiffness and the flexural capacity of composite beams were improved by CFRP strengthening.

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备注/Memo

备注/Memo:
收稿日期:2015-02-02
基金项目:国家自然科学基金(51478220); 江苏省普通高校研究生科研创新计划(CXLX13_421)
作者简介:陈春(1990—),男,江苏南通人,硕士,主要研究方向为木-混凝土组合结构; 胡夏闽(联系人),教授,E-mail:verbundbau@163.com.
引用本文:陈春,胡夏闽,韦尘雨.碳纤维增强复合材料增强胶合木-混凝土组合梁静力试验[J].南京工业大学学报:自然科学版,2015,37(6):75-80..
更新日期/Last Update: 2015-11-20