（1 广西大学土木建筑工程学院工程防灾与结构安全教育部重点实验室， 南宁 530004；2 广西防灾减灾与工程安全重点实验室，  南宁 530004; 3 西安建筑科技大学土木工程学院， 西安 710055)

［摘要］为了评估钢管高强混凝土组合柱受剪承载能力，以已有试验为基础，重点分析钢管截面尺寸（或者钢管径高比、钢管位置系数）等参数对组合柱受剪性能的影响，探讨受剪强度计算方法。研究表明：箍筋配置适量的组合柱构件破坏形态为剪切斜压破坏；构件受剪承载力随剪跨比的增加而逐渐降低，随钢管径高比、轴压比和配箍率的提高而呈增长的趋势，但增幅到一定值后逐渐缓慢，甚至下降；在我国现行《钢管混凝土叠合柱结构技术规程》（CECS 188∶2005）基础上，提出能够考虑钢管截面尺寸与箍筋耦合作用的钢管高强混凝土组合柱受剪承载力计算公式，计算结果与试验结果吻合较好。

［关键词］钢管混凝土； 高强混凝土； 组合柱； 受剪承载力 

中图分类号：TU398文献标识码：A文章编号：1002-848X(2018)02-0084-04

Shear bearing capacity calculation of high-strength concrete encased CFST composite columns

Ke Xiaojun1,2, Chen Zongping1,2, Xue Jianyang3, Su Yisheng1,2

(1 Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, College of Civil and Architectural Engineering, Guangxi University, Nanning 530004, China; 2 Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Guangxi University, Nanning 530004, China; 3 School of Civil Engineering, Xi′an University of Architecture and Technology, Xi′an 710055, China)

Abstract:To evaluate shear bearing capacity of high-strength concrete encased CFST composite columns, the existing experimental basis was used to emphatically analyze impacts of steel tube section size (or steel tube diameter-height ratio, steel tube position coefficient) on shear behavior, and explore the calculation method for shear bearing capacity. Research shows that the composite columns with proper amount of stirrups occur to shear diagonal compression failure. The shear bearing capacity of composite columns reduces with the increase of shear-span ratio and increases with the increases of steel tube diameter-height ratio, axial pressure ratio and stirrup ratio, but the increase magnitude growth becomes gradually slow or even decreases after a certain value. Based on Chinese code of Technical specification for steel tube-reinforced concrete column structure (CECS 188∶2005), the calculation formula of shear bearing capacity of high-strength concrete encased CFST composite columns is proposed considering section size and stirrup coupling effect, and the calculation results agree well with the experimental results.

Keywords:CFST; high-strength concrete; composite column; shear bearing capacity

*国家自然科学基金项目（51668007，51508112，51468003），广西自然科学基金项目（2015GXNSFBA139210）, 广西重点实验室系统性研究项目（2016ZDX02）。

作者简介：柯晓军，博士，副研究员，Email: xj-ke@163.com。