Please wait a minute...
浙江大学学报(工学版)  2017, Vol. 51 Issue (9): 1688-1694    DOI: 10.3785/j.issn.1008-973X.2017.09.002
土木与交通工程     
新型被动式真三轴试验装置
李奔奔1, 江佳斐1, 豆香香1, 肖平成2
1. 同济大学 结构工程与防灾研究所, 上海 200092;
2. 中国能源建设集团江苏省电力设计院有限公司, 江苏 南京 210036
New true-triaxial test apparatus with passive confinement
LI Ben-ben1, JIANG Jia-fei1, DOU Xiang-xiang1, XIAO Ping-cheng2
1. Research Institute of Structural Engineering and Disaster Reduction, Tongji University, Shanghai 200092, China;
2. Energy China JSPDI, Nanjing 210036, China
 全文: PDF(3098 KB)   HTML
摘要:

为探究混凝土在被动约束机制下的多轴本构关系,采用玻璃纤维增强复合材料(GFRP)筋和钢板作为组成侧向围压装置的主要部件,采用万能试验机作为竖向加载装置,形成新型被动式真三轴试验装置.该装置可在两垂直方向施加互相独立的随混凝土侧向膨胀线性增长的被动约束.通过单根GFRP筋及侧向围压装置的轴拉试验,验证采用同种GFRP筋的侧向围压装置的被动约束刚度的恒定性和可重复性,并确定不同GFRP筋直径对应的侧向刚度值.对12个100mm×100mm×100mm的混凝土立方体试块进行双向等约束的被动式真三轴试验.立方体试块的力学性能与FRP布约束混凝土标准圆柱的轴压结果类似,极限强度随约束刚度比的增长而增长.该装置可为混凝土提供有效的被动围压,替代FRP包裹圆柱的试验方法,为被动约束下混凝土的本构关系研究提供试验基础.

Abstract:

A new true-triaxial test apparatus with passive confinement was developed to explore the multi-axial constitutive relationship of concrete under passive confinement mechanism. In the new test apparatus, the lateral confinement apparatus was mainly composed of glass fiber reinforced polymer (GFRP) bars and steel plates; the universal testing machine was employed to exert vertical load. The apparatus can apply independent passive confinement in two perpendicular directions. The passive confinement increases linearly with the increase of concrete lateral expansion. After the tensile testing on the single GFRP bar and the lateral confinement apparatus, the stability and repeatability of the lateral confinement apparatus with the same GFRP bars were verified, and the lateral stiffness value with respect to the GFRP bar of certain diameter was calibrated. The true-triaxial experiments were carried out on twelve concrete cubes of 100mm×100mm×100mm with bi-directional uniform passive confinement. The mechanical behavior of test cubes is similar with the concrete cylinders wrapped by FRP sheets. The ultimate strength increased with the increase of confinement stiffness ratio. Results demonstrate that the new test apparatus can provide effective passive confinement for concrete and replace the test method using FRP wrapped cylinder, as well as provide essential testing method for the study on constitutive relationship of concrete under passive confinement.

收稿日期: 2017-01-13 出版日期: 2017-08-25
CLC:  TU528.572  
基金资助:

国家自然科学基金资助项目(51308404).

通讯作者: 江佳斐,女,助理研究员.orcid.org/0000-0002-8123-8453.     E-mail: jfjiang@tongji.edu.cn
作者简介: 李奔奔(1991-),女,博士生,从事被动约束混凝土本构关系研究.orcid.org/0000-0002-2530-7987.E-mail:bben369@163.com
服务  
把本文推荐给朋友
加入引用管理器
E-mail Alert
作者相关文章  

引用本文:

李奔奔, 江佳斐, 豆香香, 肖平成. 新型被动式真三轴试验装置[J]. 浙江大学学报(工学版), 2017, 51(9): 1688-1694.

LI Ben-ben, JIANG Jia-fei, DOU Xiang-xiang, XIAO Ping-cheng. New true-triaxial test apparatus with passive confinement. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2017, 51(9): 1688-1694.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2017.09.002        http://www.zjujournals.com/eng/CN/Y2017/V51/I9/1688

[1] RICHART F E, BRANDTZAEG A, BROWN R L.A study of the failure of concrete under combined compressive stresses[R]. University of Illinois EngineeringExperiment Station, 1928.
[2] STEINER D. Study of the behavior of concrete under triaxial compression[J]. Journal of Engineering Mechanics, 2002, 128(2):156-163.
[3] MANDER J B, PRIESTLEY M J N, PARK R. Theoretical stress-strain model for confined concrete[J]. Journal of Structural Engineering, 1988, 114(8):1804-1826.
[4] TENG J G, LIN G, YU T. Analysis-oriented stress-strain model for concrete under combined FRP-steel confinement[J]. Journal of Composites for Construction, 2015, 19(5):04014084.
[5] 过镇海.混凝土的强度和变形:试验基础和本构关系[M].北京:清华大学出版社,1997.
[6] 熊海贝,李奔奔,江佳斐. FRP约束混凝土圆柱应力-应变模型的适用性[J].浙江大学学报:工学版, 2015,49(12):2363-2375. XIONG Hai-bei, LI Ben-ben, JIANG Jia-fei. Applicability of stress-strain model for FRP-confined concrete cylinders[J]. Journal of Zhejiang University:Engineering Science,2015, 49(12):2363-2375.
[7] LIM J C, OZBAKKALOGLU T. Lateral strain-to-axial strain relationship of confined concrete[J]. Journal of Structural Engineering,2014,141(5):04014141.
[8] 江佳斐,肖平成,李奔奔.一种用于三轴试验的被动式约束加载装置:2014106138566[P]. 2015-02-11.
[9] ZHANG B, BENMOKRANE B, CHENNOUF A. Prediction of tensile capacity of bond anchorages for FRP tendons[J]. Journal of Composites for Construction, 2000, 4(2):39-47.
[10] 周继凯,杜钦庆,吕娇云,等.玻璃纤维增强复合材料筋材连接试验研究[J].玻璃钢/复合材料, 2006(5):24-27. ZHOU Ji-kai, DU Qin-qing, LV Jiao-yun. Experimental study of glassfiber reinforce polymer bar joint[J]. Fiber Reinforced Plastics/Composites, 2006(5):24-27.
[11] 中华人民共和国住房和城乡建设部,中华人民共和国质量监督检验检疫总局. 纤维增强复合材料建设工程应用技术规范:GB50608-2010. 北京:中国计划出版社,2010.
[12] American Society of Testing and Materials International. Standard test method for tensile properties of pultruded glass-fiber-reinforced plastic rod:ASTM D 3916-08. 2008.https://compass.astm.org/EDIT/html_anot.cgi?D3916+08(2016).
[13] 中国人民共和国质量监督检验检疫总局,中华人民共和国标准化管理委员会. 拉挤玻璃纤维增强塑料杆力学性能试验方法:GBT 13096-2008. 北京:中国标准出版社,2008.
[14] 周继凯,杜钦庆,陈礼和,等.GFRP筋拉伸力学性能尺寸效应试验研究[J].河海大学学报:自然科学版, 2008, 36(2):242-247. ZHOU Ji-kai, DU Qin-qing, CHEN Li-he, et al.Experimenal study on size effect in tensile mechanical properties of GFRP rebar[J]. Journal of HohaiUniversity:Natural Sciences, 2008, 36(2):242-247.
[15] 徐新生,郑永峰.FRP筋力学性能试验研究及混杂效应分析[J].建筑材料学报,2007,10(6):705-710. XU Xin-sheng, ZHENG Yong-feng. Hybrid effectanalysis and experimental study on mechanical properties of the FRP bar[J]. Journal of Building Materials, 2007, 10(6):705-710.
[16] 李树新,李贵春.FRP筋性能及在混凝土结构中的应用[J].河北建筑工程学院学报,2006, 24(1):10-12. LI Shu-xin, LI Gui-chun, Function of FRP steel and its application in the concrete structure[J]. Journal of Hebei Institute of Architectural Engineering, 2006, 24(1):10-12.
[17] 肖平成,李奔奔,江佳斐.减摩擦垫层对混凝土轴压试验的影响[J].材料科学与工程学报,2015,33(1):127-132.XIAO Ping-cheng,LI Ben-ben,JIANG Jia-fei,Effect of friction-reducing pads on concrete under compression[J].Journal of Materials Science and Engineering,2015,33(1):127-132.
[18] 潘景龙,王雨光,来文汇.混凝土柱截面形状对纤维包裹加固效果的影响[J].工业建筑,2001,31(6):17-19.PAN Jing-long,WANG Yu-guang,LAI Wen-hui.Effect of sectional shape of concrete column on the bearing capacity of short columns wrapped with FRP[J].Industrial Construction,2001,31(6):17-19.
[19] 吴刚,吕志涛.纤维增强复合材料(FRP)约束混凝土矩形柱应力-应变关系的研究[J].建筑结构学报,2004,25(3):99-106.WU Gang,LU Zhi-tao.Study on the stress-strain relationship of FRP-confined concrete rectangularcolumns[J].Journal of Building Structures,2004,25(3):99-106.
[20] LAM L,TENG J G.Ultimate condition of fiber reinforced polymer-confined concrete[J].Journal of Composites for Construction,2004,8(6):539-548.

No related articles found!