全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用：99美元
投递稿件

查看量下载量

相关文章

更多...
工程力学  2015 

TRC加固RC梁的弯曲疲劳破坏过程和应变发展的试验研究

DOI: 10.6052/j.issn.1000-4750.2014.04.S010, PP. 142-148

Keywords: 纤维编织网增强混凝土,受弯梁,疲劳,破坏过程,应变发展

Full-Text   Cite this paper   Add to My Lib

Abstract:

该文采用四点弯曲加载方式研究了加固方式、配网率、配筋率、损伤程度等对TRC加固RC梁疲劳寿命、破坏过程及应变发展的影响。试验结果发现：TRC加固梁在疲劳荷载作用下其破坏过程可以分为三个阶段。第一阶段：循环次数大约在4万次以内,新的裂缝会不断产生,此阶段末裂缝基本出齐,该阶段相对加固梁的整个寿命过程较短;第二阶段表现为加固梁的挠度几乎不变,该阶段末梁会产生新的裂缝,并形成主裂缝;第三阶段：加固梁的跨中挠度迅速增加,在时间很短的情况下梁发生疲劳破坏。加固梁的混凝土压应变与受拉钢筋应变随荷载循环次数的增加也呈三个阶段发展：初始发展、稳定发展和迅速发展。配网率和配筋率的增大都会减缓中和轴的上移速度,减小疲劳破坏时梁顶混凝土压应变,从而提高疲劳寿命。较大荷载作用下的静力损伤会使加固梁的钢筋应变提前进入第三阶段的发展,会减小RC梁的疲劳寿命。

 References

[1]  尹世平. TRC基本力学性能及其增强钢筋混凝土结构受弯性能研究[D]. 大连: 大连理工大学, 2010.
[2]  Yin Shiping. Research on TRC mechanical behavior and flexural performance of concrete beam reinforced with TRC [D]. Dalian: Dalian University of Technology, 2010. (in Chinese)
[3]  徐世烺, 尹世平, 蔡新华. 纤维编织网增强混凝土加固钢筋混凝土受弯梁的抗裂性能研究[J]. 水利学报, 2010, 41(7): 833―840.
[4]  Xu Shilang, Yin Shiping, Cai Xinhua. Investigation on crack resistance of flexural RC beam strengthened with textile-reinforced concrete [J]. Shuili Xuebao, 2010, 47(1): 833―840. (in Chinese)
[5]  刘德军, 黄宏伟, 薛亚东, 王明卓. 纤维编织网增强混凝土补强隧道衬砌力学性能研究[J]. 工程力学, 2014, 31(7): 91―98.
[6]  Liu Dejun, Huang Hongwei, Xue Yadong, Wang Mingzhuo. Research on behavior of tunnel lining strengthened by Textile-Reinforced concrete [J]. Engineering Mechanics, 2014, 31(7): 91―98. (in Chinese)
[7]  薛亚东, 刘德军, 黄宏伟, 王明卓. 纤维编织网增强混凝土侧面加固偏压短柱试验研究[J]. 工程力学, 2014, 31(3): 228―236.
[8]  Xue Yadong, Liu Dejun, Huang Hongwei, Wang Mingzhuo. Experimental study on eccentric compressive short columns strengthened by Textile-Reinforced concrete on side [J]. Engineering Mechanics2014, 31(3): 228―236. (in Chinese)
[9]  D’Ambrisi A, Focacci F. Flexural strengthening of RC beams with cement-based composites [J]. Journal of Composites for Construction, 2011, 15(5): 707―720.
[10]  Schladitz F, Frenzel M, Ehlig D, et al. Bending load capacity of reinforced concrete slabs strengthened reinforced concrete beams [J]. Engineering structures, 2012, 40: 317―326.
[11]  Elsanadedy H M, Almusallam T H, Alsayed S H, et al. Flexural strengthening of RC beams using textile reinforced mortar-experimental and numerical study [J]. Composite Structures, 2013, 97: 40―55.
[12]  尹世平, 徐世烺. 钢筋与纤维编织网联合增强细粒混凝土梁的弯曲试验与理论研究[J]. 工程力学, 2011, 28(1): 87―95.
[13]  Yin Shiping, Xu Shilang. Experimental and theoretical investigation on the flexural behavior of fine grained concrete beam reinforced with textile-combined steel [J]. Engineering Mechanics, 2011, 28(1): 87―95. (in Chinese)
[14]  荀勇, 支正东, 张勤. 织物增强混凝土薄板加固钢筋混凝土梁受弯性能试验研究[J]. 建筑结构学报, 2010, 31(3): 70―76.
[15]  Xun Yong, Zhi Zhengdong, Zhang Qin. Experimental research on flexural behavior of reinforced concrete beams strengthened with textile reinforced concrete sheets [J]. Journal of Building Structures, 2010, 31(3): 70―76. (in Chinese)
[16]  徐世烺, 尹世平, 蔡新华. 纤维编织网增强混凝土加固钢筋混凝土梁受弯性能研究[J]. 土木工程学报, 2011, 44(4): 23―34.
[17]  Xu Shilang, Yin Shiping, Cai Xinhua. Investigation on the flexural behavior of reinforced concrete beam strengthened with textile-reinforced concrete [J]. China Civil Engineering Journal, 2011, 44(4): 23―34. (in Chinese)
[18]  徐世烺, 尹世平. 纤维编织网增强细粒混凝土加固RC受弯构件的正截面承载性能研究[J]. 土木工程学报, 2012, 45(1): 1―7.
[19]  Xu Shilang, Yin Shiping. Investigation on the bearing capacity of the normal section of RC flexural component strengthened with textile-reinforced concrete [J]. China Civil Engineering Journal, 2012, 45(1): 1―7. (in Chinese)
[20]  张雷. TRC抗弯加固RC梁的有限元分析[D]. 大连: 大连理工大学, 2010.
[21]  Zhang Lei. Finite element modeling of RC structures strengthened with TRC [D]. Dalian: Dalian University of Technology, 2010. (in Chinese)

Full-Text

Contact Us

[email protected]

QQ:3279437679

WhatsApp +8615387084133