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Research status and development trend of concretefilleddouble steel tube structures(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2022年1期
Page:
1-15
Research Field:
桥梁与隧道工程
Publishing date:

Info

Title:
Research status and development trend of concretefilleddouble steel tube structures
Author(s):
ZHAO Junhai;  FAN Junchao;  HU Yi;  ZHANG Dongfang
(1. School of Civil Engineering, Changan University, Xian 710061, Shaanxi, China; 2. School of CivilEngineering, Central South University of Forestry and Technology, Changsha 410004, Hunan, China)
Keywords:
bridge engineering;  civil engineering;  research status;  literature review;  concretefilled double steel tube
PACS:
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DOI:
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Abstract:
With the rapid development of society, buildings are upgraded constantly. Therefore, it is desired in engineering practice that the concretefilled steel tube (CFST) structures with higher bearing capacity, stiffness, and ductility. A singlelayer steel tube or multilayer steel tubes were placed in the CFST column concentrically to form a novel CFST structure, which was defined as the concretefilled doubleskin steel tube (CFDST) structures. A large number of experimental results show that the CFDST structures possess better mechanical properties. The research status of the CFDST structures was summarized from three aspects of the CFDST column, the CFDST beamcolumn joint and the prefabricated CFDST structure system. The results of experiments and finite element analysis about different CFDST structures indicate that the CFDST structures with the crosssections of the inner circle and outer circle, the inner circle and outer square, and the inner square and outer square own superior properties respectively. Furthermore, the hollow ratio, the strength of concrete, the strength and thickness of steel tube, and the diameter ratio between inner steel tube and outer steel tube and so on are main parameters that affect the performance of the CFDST structures. Moreover, the CFDST structures possess reliable properties of mechanics when the stainless steel tube, the corrugated steel tube, the recycled concrete, and the rubberized concrete are adopted in it. The application of novel composite concrete can satisfy the requirements of environmental protection and achieve sustainable development of buildings. With the promulgation of relevant policies and the continuous change of building demands in development of society, the research about the CFDST structures will focus on the diversification of structures, the sustainable development, the fire resistance of structures, and the fabricated structures. To obtain more and more CFDST structures with better mechanical properties and easy application in engineering practice is the ultimate goal. 19 figs, 64 refs.

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Last Update: 2022-04-06