Mechanical performance of concrete-filled square steel tube stiffened with PBL under bending

被引：0
|
作者：
Liu J.-P. [1 ]
Zhou Z.-Y. [1 ]
Liu Y.-J. [2 ]
Chen B.-C. [1 ]
机构：
[1] College of Civil Engineering, Fuzhou University, Fuzhou, 350116, Fujian
[2] School of Highway, Chang'an University, Xi'an, 710064, Shaanxi
来源：
Liu, Jun-Ping (ljp0486@163.com) | 2017年 / Tsinghua University卷 / 34期
关键词：
Bending mechanical behavior; Concrete-filled square steel tube; PBL stiffening rib; PBL stiffening rib structure; Ultimate bearing capacity;
D O I：
10.6052/j.issn.1000-4750.2016.08.0603
中图分类号：
学科分类号：
摘要：
To study the mechanical performance of concrete-filled square steel tube stiffened with PBL under bending, this paper describes a comparison test study on the mechanical behavior of three types of concrete-filled square steel tube structure under bending. The first type is concrete-filled square steel tube, the second type is concrete-filled square steel tube with steel plate stiffening rib, and the third type is concrete-filled square steel tube with PBL stiffening rib. The influences of aperture size and spacing of PBL were also investigated. Test results indicate that the failure mode of the first type specimen was single wave buckling, the failure modes of the other two were double wave buckling. Concrete crack distribution of the third type specimen was more uniform, and the width and spacing were smaller, showing steel tube and concrete worked together better. The bending capacity improved by PBL stiffening rib was not obvious, but the bending rigidity was increased by about 20% compared with the first type specimen. Whether the steel plate rib has pore or not had little effect on the rigidity of specimens. FEA results demonstrate that the bending capacity increased with the increase of the height and width of PBL stiffening rib, but decreased with the increase of relative pore diameter d0, and the influence of pore spacing on bearing capacity was very small. Based on the test and FEA results, a simplified calculation method of concrete-filled square steel tube with PBL stiffening rib was proposed, and the value of relative pore diameter and relative pore spacing were recommended as 0.5 and 2.0 respectively in practical project. © 2017, Engineering Mechanics Press. All right reserved.
引用
收藏
页码：104 / 111
页数：7
相关论文
共 23 条
  • [1] Clotilda P., Hanizah A.H., Azmi I., Et al., Experimental behavior of concrete filled thin walled steel tubes with tab stiffeners, Journal of Constructional Steel Research, 66, 7, pp. 915-922, (2010)
  • [2] Zhang Y., Chen Y., Experimental study and finite element analysis of square stub columns with straight ribs of concrete-filled thin-walled steel tube, Journal of Building Structures, 27, 5, pp. 16-22, (2006)
  • [3] Chen Y., Dong Z., Zhang Y., The confined model on square stub column of concrete-filled thin-walled steel tube, Engineering Mechanics, 29, 9, (2012)
  • [4] Wang Z., Tao Z., Design of concrete-filled thin-walled stiffened steel tubular stub column with square sections, Industrial Construction, 37, 12, pp. 13-17, (2007)
  • [5] Tao Z., Han L., Wang Z., Experimental behavior of stiffened concrete-filled thin-walled hollow steel structural (HSS) stub columns, Journal of Constructional Steel Research, 61, 7, pp. 962-983, (2005)
  • [6] Tang G., Xiao Y., Zhang Y., Study of bearing capacity and complete stress-strain curves for concrete filled square steel tube columns, Engineering Mechanics, 32, 8, pp. 103-111, (2015)
  • [7] Cai J., Sun G., Constitutive relationship of L-section CFT with binding bar, Engineering Mechanics, 25, 10, pp. 173-179, (2008)
  • [8] Huang H., Zhang A., Li Y., Et al., Experimental research and finite element analysis on mechanical performance of concrete-filled stiffened square steel tubular stub columns subjected to axial compression, Journal of Building Structures, 32, 2, pp. 75-82, (2011)
  • [9] Han L., Concrete Filled Steel Tubular Structures-Theory and Practice, pp. 192-226, (2007)
  • [10] Wang R., Han L., Nie J., Et al., Flexural performance of rectangular CFST members, Thin-Walled Structures, 79, 2, pp. 154-165, (2014)
123