（1 清华大学土木工程安全与耐久教育部重点实验室， 北京 100084；2 北京工业大学建筑工程学院， 北京 100124）

［摘要］为研究复合钢管高强混凝土构件的受弯性能，完成了8个试件的静力试验。结果表明，试件跨中挠度达到其跨度的1/18时，除个别试件外，承载力均尚未下降；增大方钢管的壁厚或增大圆钢管的直径，都可提高构件的受弯承载力和弹性抗弯刚度。采用简化纤维模型（条带法）计算试件的跨中弯矩-挠度关系曲线，采用叠加法计算试件的受弯承载力，两者所得结果与试验结果均符合良好。

［关键词］复合钢管高强混凝土构件; 静力试验; 简化纤维模型; 叠加法; 受弯承载力

中图分类号：TU398+.1，TU317+.2      文献标识码：A      文章编号：1002-848X(2014)04-0025-05

Test study on bending behavior of composite-sectioned high strength concrete-filled steel tubular members

Zhang Yang1, Qian Jiaru1, Cao Wanlin2

(1 Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Tsinghua University, Beijing 100084, China; 2 College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China)

Abstract: To study the flexural behavior of composite-sectioned high strength concrete filled steel tubular (CSCFT) members, static test of 8 simple-supported specimens was performed. The test results indicated that even the mid-span vertical deflection reaches 1/18 of span, the flexural strength of most specimens does not drop yet. Increasing the wall thickness of square steel tube or increasing the diameter of circular steel tube could increase the flexural strength and the sectional elastic bending stiffness of CSCFT members. The mid-span moment-deflection curves of specimens calculated by the simplified fiber model has good agreement with the test curves. The flexural strength of specimens calculated by superposition method also has good agreement with the test results.

Keywords: composite-sectioned high strength concrete filled steel tubular member; static test; simplified fiber model; superposition method; flexural strength

*北京市科技计划重点项目(D09050600370000)。

作者简介：张扬，博士，Email: yang-zhang08@mails.tsinghua.edu.cn。

参考文献

［1］钱稼茹, 张扬, 纪晓东, 等. 复合钢管高强混凝土短柱轴心受压性能试验与分析［J］.建筑结构学报, 2011, 32(12): 162-169.

［2］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.

［3］过镇海. 钢筋混凝土原理［M］. 北京: 清华大学出版社, 1999.

［4］KENJI SAKINO, HTROYUKI NAKAHARA, SHOSUKE MORINO, et al. Behavior of centrally loaded concrete-filled steel-tube short columns ［J］. Journal of Structural Engineering, 2004, 130(2): 180-188.

［5］叶列平. 钢筋混凝土结构设计［M］. 北京: 中国建筑工业出版社, 2012.

［6］JGJ 3—2010 高层建筑混凝土结构技术规程［S］. 北京: 中国建筑工业出版社, 2011.

［7］CECS 159∶2004矩形钢管混凝土结构技术规程［S］. 北京: 中国计划出版社, 2004.