|Table of Contents|

Seismic Behavior of Tapered Concrete-filled Double Skin Steel Tube Compression-bending Members(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2019年05期
Page:
80-88
Research Field:
Publishing date:

Info

Title:
Seismic Behavior of Tapered Concrete-filled Double Skin Steel Tube Compression-bending Members
Author(s):
SHI Yan-li;  ZHANG Chen;  WANG Jing-xuan;  WANG Wen-da
(School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu, China)
Keywords:
tapered concrete-filled double skin steel tube;  numerical analysis;  seismic behavior;  compression-bending member
PACS:
TU398
DOI:
-
Abstract:
The rational material constitutive model and concrete damage index were chosen, and the numerical analysis model of tapered concrete-filled double skin steel tubular(CFDST)specimens were established by the ABAQUS software. The results were compared with the existing experimental data to verify the rationality of the model. On the basis, a typical example was established, and the seismic performance index of the typical example was analyzed. At the same time, the failure mode of the component was described. The parameters that had significant influence on the seismic performance index of the tapered CFDST were analyzed, such as axial compression ratio, hollow ratio and slenderness ratio. The influences of three parameters on the ultimate bearing capacity, ductility coefficient and energy dissipation capacity of hysteretic curve were investigated. The seismic behaviors between tapered CFDST and uniform section CFDST with different section sizes were compared. The equivalent seismic performances of tapered CFDST and uniform section CFDST with different section sizes were explored. The results show that within a certain range, the increases of axial compression ratio and slenderness ratio make the energy dissipation performance of components worse, and the increase of hollow ratio makes the energy dissipation performance of components better, but it is necessary to define the limits of each parameter. The reduction of section area reduces the bearing capacity and energy dissipation performance of members. The seismic behaviors of the tapered CFDST are equivalent to the uniform section of CFDST at one quarter of the height from the bottom of the tapered CFDST.

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Last Update: 2019-09-29