全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
工程力学  2014 

基于ABAQUS的表面内嵌CFRP筋粘结滑移性能数值模拟分析

, PP. 239-244

Keywords: 表面内嵌CFRP筋或板条,混凝土,粘结滑移,有限元模拟,弹簧单元

Full-Text   Cite this paper   Add to My Lib

Abstract:

利用ABAQUS有限元软件,对混凝土、CFRP筋或板条以及粘结剂分别采用不同的单元类型,特别是运用Spring2非线性弹簧单元来模拟表面内嵌CFRP筋或板条混凝土的粘结作用,同时考虑材料各自的本构关系,对表面内嵌CFRP筋混凝土拉拔试件和内嵌CFRP板条加固混凝土梁试件进行有限元模拟,将模拟结果与已有试验结果进行对比验证。结果表明,利用数值模拟的方法可以得到较为准确的拉拔试件的极限值,也可以较为正确地模拟加固梁的受力过程。在验证模拟结果正确的基础上,进一步分析了拉拔试件CFRP筋应力、滑移、粘结应力随不同位置的变化规律以及加固梁CFRP板条粘结区域内应变和粘结应力的分布情况。研究结果表明,对于拉拔试件,不同荷载等级作用下,CFRP筋在粘结区域内不同位置处的应力呈非线性变化,而粘结应力峰值出现在距加载点20mm~40mm位置处,其随位置的变化曲线呈偏态曲线特点。对于表面内嵌CFRP板条加固梁,粘结区域内CFRP应变和粘结应力在梁屈服后激增,且呈非线性变化。

References

[1]  丁亚红, 郝敏慧. FRP加固技术研究概述[J]. 工程抗震与加固改造, 2012, 34(2): 69―74.
[2]  Ding Yahong, Hao Minhui. Research summary on FRP reinforcement technique [J]. Earthquake Resistant Engineering and Retrofitting, 2012, 34(2): 69―74. (in Chinese)
[3]  姚谏. FRP复合材料加固混凝土结构新技术研究进展[J]. 科技通报, 2004, 20(3): 216―221.
[4]  Yao Jian. Research advance in FRP-strengthened RC structures [J]. Bulletin of Science and Technology, 2004, 20(3): 216―221. (in Chinese)
[5]  岳清瑞. 我国碳纤维(CFRP)加固修复技术研究应用现状与展望[J]. 工业建筑, 2000, 30(10): 23―27.
[6]  Yue Qingrui. Present status of research and application of strengthening and repairing technology with carbon fiber reinforced plastics (CFRP) and its outlook in china [J]. Industrial Construction, 2000, 30(10): 23―27. (in Chinese)
[7]  De Lorenzis L, J G Teng. Near-surface mounted FRP reinforcement: An emerging technique for strengthening structures [J]. Composites: Part B, 2007, 38(2): 119―143.
[8]  De Lorenzis L, Nanni A. Characterization of FRP rods as near-surface mounted reinforcement [J]. Journal of Composites for Construction, 2001, 5(2): 114―121.
[9]  Nanni A. North American design guidelines for concrete reinforcement and strengthening using FRP: principles, applications, and unresolved issues [J]. Construction and Building Materials, 2005(17): 439―446.
[10]  De Lorenzis L, Rizzo A, La Tegola A. A modified pull out test for bond of near surface mounted FRP rods in concrete [J]. Composites Part B:Engineering, 2002, 33(8): 589―603.
[11]  Novidis D G, Pantazopoulou S J. Bond tests of short NSM-FRP and steel bar anchorage [J]. Journal of Composites for Construction, 2008, 12(3): 323―333.
[12]  李荣, 滕锦光, 岳清瑞. 嵌入式CFRP板条-混凝土界面粘结性能的试验研究[J]. 工业建筑, 2005, 35(8): 31―34.
[13]  Li Rong, Teng Jinguang, Yue Qingrui. Experimental study on bond behavior of NSM CFRP strips concrete interface [J]. Industrial Construction, 2005, 35(8): 31―34. (in Chinese)
[14]  王勃, 侯淑亮, 刘殿忠, 隋莉莉. GFRP筋嵌入式加固混凝土构件黏结破坏性能试验研究[J]. 混凝土, 2011, 1: 134―135.
[15]  Wang Bo, Hou Shuliang, Liu Dianzhong, Sui Lili. Bond failure behavior of NSM GFRP bar to concrete [J]. Concrete, 2011, 1: 134―135. (in Chinese)
[16]  Shehab M Soliman, Ehab El-Salakawy, Brahim Benmokrane. Bond Performance of Near-Surface- Mounted FRP Bars [J]. Journal of Composites for Construction, 2011, 15(1):103―111.
[17]  胡志海. 内嵌式纤维板条-混凝土粘结本构模型及其应用研究[D]. 长沙: 中南大学, 2007: 46―57.
[18]  Hu Zhihai. Research of bond-slip basic constitutive relation model between NSM CFRP plate-concrete and its application [D]. Changsha: Central South University, 2007: 46―57. (in Chinese)

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133