（1 北京工业大学城市与工程安全减灾教育部重点实验室， 北京 100124；

2 石家庄经济学院勘查技术与工程学院， 石家庄 050031）

［摘要］基于8个不同截面尺寸钢筋混凝土柱的单调加载试验，采用有限元软件ABAQUS对其进行了弯剪性能尺寸效应分析。通过合理选择材料本构关系及破坏准则，有限元分析得到的荷载位移关系曲线与试验结果吻合较好。在此基础上进行了参数拓展分析，研究了截面尺寸和配箍形式对大截面尺寸的钢筋混凝土柱弯剪性能的影响，结果表明：当截面边长超过700mm时，试件的弯剪性能仍然存在尺寸效应，但随着截面尺寸的增大，尺寸效应减弱；减小箍筋直径和间距可以减弱尺寸效应对试件弯剪性能的影响。

［关键词］钢筋混凝土柱； 弯剪性能； 尺寸效应； 有限元分析； 参数分析

中图分类号：TU375.3      文献标识码：A      文章编号：1002-848X(2015)08-0046-04

Nonlinear finite element analysis on size effect of flexural and shear behavior for reinforced concrete columns

Xie Yongping1,2, Li Zhenbao1, Du Xiuli1, Ma Hua1

 (1 The Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education,Beijing University of Technology, Beijing 100124, China; 2 College of Exploration Technology and Engineering，Shijiazhuang University of Economics，Shijiazhuang 050031, China)

Abstract:Eight reinforced concrete columns with different section sizes under monotonic horizontal loading were tested, and nonlinear finite element models were used to analyze the size effect of flexural and shear behavior by ABAQUS. By reasonably selected material stressstrain relations and failure criteria, the loaddeflection curves by finite element analysis show good agreement with the experimental result. Then, some factors were analyzed to investigate the effects of section size and stirrup form on  flexural and shear behavior for reinforced concrete columns with large section sizes. The results show that the size effect on mechanical behavior for reinforcement concrete column remains apparent, however the magnitude of the influence gradually become smaller when the section size is more than 700mm. Small stirrup diameter and spacing can be regard as a method to reduce the size effect on mechanical behavior of specimens.

Keywords:reinforced concrete column; flexural and shear behavior; size effect; finite element analysis; parametric analysis

*国家自然科学基金项目(50838001,51178014，51408378)，中国博士后科学基金资助项目（2014M560033），河北省自然科学基金资助项目（E2015403018）。

作者简介：解咏平，博士，讲师，Email:axypa@163.com。

                          参考文献

［1］车轶,郑新丰,王金金,等.单调荷载作用下高强混凝土梁受弯性能尺寸效应研究［J］.建筑结构学报,2012,33(6):96102.

［2］岩下善行,中西三和,白井申明，等.鉄筋コンクリート造梁の力学的性能に及ぼす寸法効果に関する研究［C］//日本建築学会構造系論文集,2008:625 632.

［3］SENER 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.

［4］KOC V, SENER S. Size effect in normal and highstrength concrete with different notches under the axial load ［J］. Journal of Materials in Civil Engineering, 2009,21(9):433445.

［5］宋佳,李振宝,杜修力,等.圆形箍筋约束混凝土力学性能尺寸效应试验［J］.解放军理工大学学报:自然科学版,2012,13(5):538543.

［6］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.

［7］周红.混凝土强度尺寸效应的实验研究［D］.大连：大连理工大学,2010.