5-7 December 2018 - Hong Kong, China

CONFERENCE PAPERS

Ninth International Conference on Advances in Steel Structures (ICASS 2018)


INNOVATIVE DESIGN THEORY OF DIRECT ANALYSIS FOR Q690 HIGH-STRENGTH STEEL BOX-COLUMNS

 

Tian-Ji Li1*, Guo-Qiang Li2, 3, Siu-Lai Chan4, Da Lv1 and Yan-Bo Wang2, 3

1Shanghai Construction No.5 (Group) Co., Ltd., Shanghai, China

Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

2State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai, China

3College of Civil Engineering, Tongji University, Shanghai, China

4Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China

DOI:10.18057/ICASS2018.P.008

ABSTRACT:

The use of columns, fabricated with high-strength steel (HSS) plates with the normal strength larger than 460 MPa, is becoming popular in congested cities like New York, Hong Kong, Shanghai, etc. The column sizes can be considerably reduced for increasing usable floor area, and load during construction is lowered, but the stability consideration of slender columns is more crucial in design, because of higher design strength to Young’s modulus ratio. Currently, the linear-based design method associated with the effective length assumptions is commonly adopted for buckling checks of steel columns. When using this method, large numbers of member tests are required for generating the buckling curves for different material grades of sections, and this causes difficulties in promoting the uses of HSS columns with higher material grades in practice. To this, a new design theory of second-order direct analysis is introduced in this chapter for design and buckling check of HSS columns with independent consideration of geometric and material imperfections, which are due to initial member crookedness and residual stress (RS). Therefore, only the limited numbers of experiments for measuring the RS on the HSS box-sections are required for identifying the RS patterns and determining the input model for the analysis. This chapter reviews the experimental investigations on the residual stress of HSS box-sections and the buckling behaviors of HSS box-columns under compression. The design theory and numerical methods are reviewed. Finally, several examples are provided to confirm the validity of the proposed analysis and design method.

Keywords:

Stability; Buckling; Direct Analysis; Design Method; Box-columns; High-strength Steel

Download PDF:

IMPORTANT DATES

First call for paper:
1 January 2018
Abstract submission: (CLOSED)
1 April 2018
Notification of abstract acceptance:
on or before 16 April 2018 
Full paper submission: 
15 July 2018
Online Registration Begins:
1 August 2018
Notification of full paper acceptance:
31 August 2018
Early bird registration:
on or before 7 September 2018
Online Registration Closes:
31 October 2018
Announcement of programme:
1 November 2018
ICASS2018 December 05, 2018 08:00 AM Time's Up