大尺寸钢筋高强混凝土柱的轴心受压性能*
- 摘 要
-
符佳，杜修力，张建伟(北京工业大学城市与工程安全减灾省部共建教育部重点实验室， 北京 100124)［摘要］钢筋混凝土构件存在尺寸效应现象，为了解大尺寸钢筋高强混凝土柱的轴心受压性能及其尺寸效应规律，使用40 000kN多功能压力机进行不同几何尺寸和不同配箍率的钢筋高强混凝土柱轴心受压性能试验。在试验基础上，对比分析了不同几何尺寸、不同配箍率的各试件破坏特征、极限承载力和变形。结果表明，大尺寸钢筋高强混凝土柱轴心受压承载力具有一定的尺寸效应，变形能力尺寸效应明显，配箍率对其承载力及变形能力存在不同程度的影响。［关键词］钢筋高强混凝土柱； 配箍率； 轴心受压性能； 尺寸效应； 单调加载试验中图分类号：TU398.7 文献标识码：A 文章编号：1002-848X(2013)05-0077-05Mechanical properties of large-size high-strength reinforced concrete columns under axial compressionFu Jia, Du Xiuli, Zhang Jianwei(Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing 100124, China)Abstract: In order to reveal the size effect law and the axial compression performance of large-size high-strength reinforced concrete columns, axial compression experiments of high-strength reinforced concrete columns with different geometric dimensions and stirrup ratio were carried out under 40 000kN multi-function press. Based on the experiments, the failure characteristic, the ultimate bearing capacity and the deformation of large\|size high\|strength reinforced concrete with different geometric dimensions and stirrup ratio were obtained. The results show that as to high-strength reinforced concrete columns with stirrups under axial loading, size effect exists in maximum carrying capacity and deformation capacity. Stirrup ratio has varying degrees of impact on maximum carrying capacity and deformation capacity.Keywords: high-strength reinforced concrete column; stirrup ratio; axial compression performance; size effect; monotonic loading test*国家自然科学基金重点项目（50838001），北京市优秀人才培养项目（20081D051500182），北京市高校中青年骨干人才培养计划资助项目(PHR201108009)作者简介：符佳，博士研究生，Email:grace516@emails.bjut.cn。参考文献［1］MAIHOTRA V M. Are 4×8 inch concrete cylinders as good as 6×12 inch cylinders for quality control of concrete? ［J］. ACI Structural Journal, 1976, 73(1): 33-36.［2］SABINS G M, MIRZA S M. Size effects in model concrete［J］. Journal of the Structural Division, 1979, 105(6):1007-1020.［3］LESSARD M, CHALLAL O, AITCIN P C. Testing high strength concrete compressive strength［J］. ACI Materials Journal, 1993, 90(4):303-308.［4］中国土木工程学会高强混凝土委员会. 高强混凝土结构设计与施工指南［M］. 北京: 中国建筑工业出版社, l994.［5］黄煜镔．混凝土脆性与力学参数的尺寸效应及其相互关系的研究［D］. 重庆: 重庆大学, 2002.［6］BAZANT Z P, KWON Y W. Failure of slender and stocky reinforced concrete columns: tests of size effect ［J］. Materials and Structures, 1994, 27(166): 7990.［7］MICHELE B, BAZANT Z P. Size effect in concrete columns: finite-element analysis with microplane model ［J］. Journal of Structural Engineering, 2001,127(12): 1382-1390.［8］NEMECEK J, BITTNAR Z. Experimental investigation and numerical simulation of postpeak behavior and size effect of reinforced concrete columns ［J］. Materials and Structures/Materiaux et Constructions, 2004, 37(267): 161-169.［9］SENE S, BARR B I G, ABUSIAF H F. Size effect in axially loaded reinforced concrete columns［J］. Journal of Structural Engineering, 2004, 130(4): 662-670.［10］杜修力,符佳,张建伟. 钢筋混凝土柱轴心受压性能尺寸效应的大比尺试验研究［J］. 土木工程学报, 2010,43(S2): 1-8.［11］GB 50010—2010 混凝土结构设计规范［S］. 北京: 中国建筑工业出版社, 2011.
