|Table of Contents|

Analysis of Bending Performance of Inner and Outer Flange Connections of Circular Concrete-filled Double Skin Steel Tubular Member(PDF)

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

Issue:
2020年04期
Page:
42-51
Research Field:
Publishing date:

Info

Title:
Analysis of Bending Performance of Inner and Outer Flange Connections of Circular Concrete-filled Double Skin Steel Tubular Member
Author(s):
WANG Wen-da;  YI Lian-bo;  FAN Jia-hao
(School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu, China)
Keywords:
flange connection;  circular concrete-filled double skin steel tubular member;  bending performance;  rotation axis;  maximum bolt tension
PACS:
TU398
DOI:
10.19815/j.jace.2019.10035
Abstract:
In order to study the bending performance of the inner and outer flange connections of the circular concrete-filled double skin steel tube, the mechanical model of the joint was established using ABAQUS software. The positions of the neutral axis and the rotation axis of the joint when the inner and outer flange connections of the circular concrete-filled double skin steel tube were bent were analyzed. The influences of the parameters such as the inner and outer flange stagger distance, bolt pre-tightening force, hollow ratio, flange thickness, concrete strength, bolt inner and outer margin ratio on the ultimate bearing capacity of the joint and the maximum bolt tension were analyzed. The results show that the neutral axis and rotation axis of the joint change with the bending moment. Before the maximum bolt at the bottom of the outer flange plate yields, the position of the rotation axis is approximately 0.6R(R is outer steel pipe radius), and the neutral axis and rotation axis of joint are not in the same section. The maximum bolt tension decreases with the increase of the thickness of flange plate, the inner and outer flange staggered distance, and the bolt inner and outer margin ratio. It increases with the increase of the hollow ratio and the bolt pre-tightening force. Concrete strength has little effect on the maximum bolt tension, so it can not be used as the main parameter for analysis.

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Last Update: 2020-07-29