[1]乔治,潘钻峰,梁坚凝,等.ECC/RC组合梁受弯性能试验研究与分析[J].东南大学学报(自然科学版),2017,47(4):724-731.[doi:10.3969/j.issn.1001-0505.2017.04.016]
 Qiao Zhi,Pan Zuanfeng,Leung C K Y,et al.Experimental study and analysis of flexural behavior of ECC/RC composite beams[J].Journal of Southeast University (Natural Science Edition),2017,47(4):724-731.[doi:10.3969/j.issn.1001-0505.2017.04.016]
点击复制

ECC/RC组合梁受弯性能试验研究与分析()
分享到:

《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
47
期数:
2017年第4期
页码:
724-731
栏目:
土木工程
出版日期:
2017-07-20

文章信息/Info

Title:
Experimental study and analysis of flexural behavior of ECC/RC composite beams
作者:
乔治1潘钻峰2梁坚凝3孟少平1
1东南大学土木工程学院, 南京 210096; 2同济大学土木工程学院, 上海 200092; 3香港科技大学土木工程学院, 香港
Author(s):
Qiao Zhi1 Pan Zuanfeng2 Leung C K Y3 Meng Shaoping1
1Shool of Civil Engineering, Southeast University, Nanjing 210096, China
2School of Civil Engineering, Tongji University, Shanghai 200092, China
3School of Civil Engineering, Hong Kong University of Science and Technology, Hong Kong, China
关键词:
工程用水泥基复合材料 组合梁 界面处理 裂缝宽度 延性 挠度
Keywords:
engineered cementitious composite(ECC) composite beam surface treatment crack width ductility deflection
分类号:
TU375.1,TU528.58
DOI:
10.3969/j.issn.1001-0505.2017.04.016
摘要:
工程用水泥基复合材料(ECC)具有超高的韧性与优异的裂缝控制能力,提出采用ECC制作U型永久性模板,与混凝土形成外包式ECC/RC组合梁,以提高构件的力学性能和耐久性能.给出了ECC/RC组合梁受弯非线性分析方法,并开展了3种不同界面处理方式的ECC/RC组合梁的弯曲性能试验研究.结果表明,相比RC梁,ECC/RC组合梁的承载力和延性均有所提高;当荷载低于极限承载力的80%时,组合梁的最大裂缝宽度小于100 μm;不同的界面处理对组合梁的极限承载力影响较小,但对延性系数有影响.试验结果验证了组合梁受弯非线性分析方法的正确性.基于ACI规范所采用的有效惯性矩法,提出了ECC/RC组合梁正常使用极限状态下挠度的简化计算方法,得到基于内力平衡的组合梁完全开裂截面的惯性矩公式,利用该简化方法计算得到的预测值与试验值吻合较好.
Abstract:
Engineered cementitious composite(ECC)has ultra-high toughness and excellent crack controlling ability. A type of ECC/RC(reinforced concrete)composite beam constructed with the U-shape permanent formwork made by ECC is proposed, in order to improve the durability and mechanical performance. A full-range nonlinear analysis method for flexural behavior of ECC/RC composite beam is presented, and three interface treatments of composite beam are designed to study the flexural behavior. Results indicate that, compared with RC beam, both the load bearing capacity and ductility of composite beam are increased. Furthermore, the crack width of composite beam is less than 100 μm when the applied load is lower than 80% of the peak load. The interface treatments in ECC/RC composite beams have little effect on the flexural strength, but they affect the member ductility to a certain extent. The calculated load-displacement curves by the proposed method are shown to be consistent with the test data. Based on the method of effective moment of inertia suggested by ACI code, a simplified calculation method of deflection for ECC/RC composite beam at the serviceability limit state is proposed, and the equations for the inertia moment of the full cracked section based on the internal force equilibrium are also obtained. The predicted deflection based on the proposed simplified calculation method shows good consistence with the experimental results.

参考文献/References:

[1] Li V C, Leung C K Y. Steady state and multiple cracking of short random fiber composites [J]. Journal of Engineering Mechanics, ASCE, 1992, 188(11): 2246-2264. DOI:10.1061/(asce)0733-9399(1992)118:11(2246).
[2] Li V C, Stang H, Krenchel H. Micromechanics of crack bridging in fibre-reinforced concrete[J]. Materials and Structures, 1993, 26(8): 486-494. DOI:10.1007/bf02472808.
[3] 侯利军. 超高韧性水泥基复合材料弯曲性能及剪切性能试验研究 [D]. 大连: 大连理工大学土木工程学院, 2012.
[4] 杨英姿, 祝瑜, 高小建, 等. 掺粉煤灰PVA纤维增强水泥基复合材料的试验研究[J]. 青岛理工大学学报,2009, 30(4): 51-54,59. DOI:10.3969/j.issn.1673-4602.2009.04.011.
Yang Yingzi, Zhu Yu, Gao Xiaojian, et al. Experimental study on high-ductile PVA fiber-reinforced cement-based composite materials with fly ash[J]. Journal of Qingdao Technological University, 2009, 30(4): 51-54,59. DOI:10.3969/j.issn.1673-4602.2009.04.011. (in Chinese)
[5] 李庆华, 徐世烺. 钢筋增强超高韧性水泥基复合材料受弯构件理论分析[J]. 工程力学, 2010, 27(7):92-102.
  Li Qinghua, Xu Shilang. Theoretical analysis on flexural behavior of reinforced ultra high toughness cementitious composite members [J]. Engineering Mechanics, 2010, 27(7): 92-102.(in Chinese)
[6] 薛会青, 邓宗才. HRECC梁弯曲性能的试验研究与理论分析[J]. 土木工程学报, 2013, 46(4): 10-17.
  Xue Huiqing, Deng Zongcai. Experimental and theoretical studies on bending performance of HRECC beams [J]. China Civil Engineering Journal, 2013, 46(4): 10-17.(in Chinese)
[7] Fischer G, Li V C. Effect of matrix ductility on the performance of reinforced ECC column members under reversed cyclic loading conditions [C]//Proceedings of the JCI International Workshop on Ductile Fiber Reinforced Cementitious Composites(DFRCC). Takayama, Japan, 2002: 269-278.
[8] Maalej M, Li V C. Introduction of strain-hardening engineered cementitious composites in design of reinforced concrete flexural members for improved durability [J]. ACI Structural Journal, 1995, 92(2): 167-176.
[9] Xu Shilang, Li Qinghua. Theoretical analysis on bending behavior of functionally graded composite beam crack-controlled by ultrahigh toughness cementitious composites[J]. Science in China Series E: Technological Sciences, 2009, 52(2):363-378. DOI:10.1007/s11431-008-0337-9.
[10] Yuan F, Pan J, Leung C K Y. Flexural behaviors of ECC and concrete/ECC composite beams reinforced with basalt fiber-reinforced polymer [J]. Journal of Composites for Construction, 2013, 17(5): 591-602. DOI:10.1061/(asce)cc.1943-5614.0000381.
[11] Leung C K Y, Cao Q. Development of pseudo-ductile permanent formwork for durable concrete structures[J].Materials and Structures, 2009, 43(7): 993-1007. DOI:10.1617/s11527-009-9561-4.
[12] Li H, Leung C K Y, Xu S, et al. Potential use of strain hardening ECC in permanent formwork with small scale flexural beams[J]. Journal of Wuhan University of Technology(Materials Science Edition), 2009, 24(3): 482-487. DOI:10.1007/s11595-009-3482-5.
[13] Maalej M, Li V C. Flexural/tensile-strength ratio in engineered cementitious composites[J]. Journal of Materials in Civil Engineering, 1994, 6(4): 513-528. DOI:10.1061/(asce)0899-1561(1994)6:4(513).
[14] 乔治, 潘钻峰, 孟少平, 等. 混杂 PVA-ECC 配合比优化设计及力学性能试验研究[J]. 土木建筑与环境工程, 2015, 37(5): 72-81. DOI:10.11835/j.issn.1674-4764.2015.05.011.
Qiao Zhi, Pan Zuanfeng, Meng Shaoping, et al. Optimization of mix proportion and experimental analysis of mechanical properties of hybrid PVA-ECC[J]. Journal of Civil, Architectural and Environmental Engineering, 2015, 37(5): 72-81. DOI:10.11835/j.issn.1674-4764.2015.05.011. (in Chinese)
[15] 蔡向荣, 徐世烺. UHTCC薄板弯曲荷载-变形硬化曲线与单轴拉伸应力-应变硬化曲线对应关系研究[J]. 工程力学, 2010, 27(1): 8-16.
  Cai Xiangrong, Xu Shilang. Study on corresponding relationships between flexural load-deformation hardening curves and tensile stress-strain hardening curves of UHTCC[J]. Engineering Mechanics, 2010, 27(1): 8-16.(in Chinese)
[16] Hognestad E, McHenry D, Hanson N W. Concrete stress distribution in ultimate strength design [J]. Journal of the American Concrete Institute, 1955, 27(4): 455-479.
[17] Tsukamoto M. Tightness of fiber concrete [J]. Darmstadt Concrete, 1990, 5: 215-225.
[18] Wang K, Jansen D C, Shah S P, et al. Permeability study of cracked concrete[J]. Cement and Concrete Research, 1997, 27(3): 381-393. DOI:10.1016/s0008-8846(97)00031-8.
[19] 中华人民共和国住房和城乡建设部. GB 50010—2010. 混凝土结构设计规范[S]. 北京:中国建筑工业出版社, 2010.
[20] American Concrete Institute. ACI 318-14 Building code requirements for structural concrete [S]. Detroit: American Concrete Institute,2014.
[21] Ashour S A. Effect of compressive strength and tensile reinforcement ratio on flexural behavior of high-strength concrete beams[J]. Engineering Structures, 2000, 22(5): 413-423. DOI:10.1016/s0141-0296(98)00135-7.
[22] Rashid M A, Mansur M A. Reinforced high-strength concrete beams in flexure [J]. ACI Structural Journal, 2005, 102(3): 462-471.

相似文献/References:

[1]马宏伟,姜维山,于庆荣,等.连接钢筋传力的组合梁及连续复合螺旋箍混凝土柱节点的研究[J].东南大学学报(自然科学版),2002,32(5):741.[doi:10.3969/j.issn.1001-0505.2002.05.014]
 Ma Hongwei,Jiang Weishan,Yu Qingrong,et al.Study on a type of reinforced bar transmitting force’s joint of composite beam and continuous compound spiral hoop reinforced concrete column[J].Journal of Southeast University (Natural Science Edition),2002,32(4):741.[doi:10.3969/j.issn.1001-0505.2002.05.014]

备注/Memo

备注/Memo:
收稿日期: 2016-12-15.
作者简介: 乔治(1989—),男,博士生;潘钻峰(联系人),男,博士,助理教授,zfpan@tongji.edu.cn.
基金项目: 国家自然科学基金青年基金资助项目(51208093)、国家自然科学基金委员会-国际交流资助项目(5141101015)、教育部博士点基金资助项目(20120092120021).
引用本文: 乔治,潘钻峰,梁坚凝,等.ECC/RC组合梁受弯性能试验研究与分析[J].东南大学学报(自然科学版),2017,47(4):724-731. DOI:10.3969/j.issn.1001-0505.2017.04.016.
更新日期/Last Update: 2017-07-20