Introduction
Bimonthly, started in 1957
Administrator
Shanxi Provincial Education Department
Sponsor
Taiyuan University of Technology
Publisher
Ed. Office of Journal of TYUT
Editor-in-Chief
SUN Hongbin
ISSN: 1007-9432
CN: 14-1220/N
Administrator
Shanxi Provincial Education Department
Sponsor
Taiyuan University of Technology
Publisher
Ed. Office of Journal of TYUT
Editor-in-Chief
SUN Hongbin
ISSN: 1007-9432
CN: 14-1220/N
location: home > paper >
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Direct Strength Method for Cold-formed Steel Channel Flexural Members with Web Holes
DOI:
10.16355/j.cnki.issn1007-9432tyut.2019.06.004
Received:
Accepted:
| Corresponding author | Institute | |
| WANG Jun | School of Civil Engineering, Northeast Forestry University |
abstract:
Direct Strength Method is an effective design method for predicting bearing capacities of cold-formed steel flexural members, in which two primary buckling failure modes, distortional buckling and local-global buckling interaction, are taken into account. The calculation process is simple relatively, which endows it with strong applicability, wide application range and broad prospect for development. In order to further improve the DSM capacity design formulas of cold-formed steel flexural members with web holes and provide reference for revision of China′s Technical Code of Cold-formed Steel Structures and engineering design, the data from 360 groups of existed tests and finite element parametric analyses corresponding to cold-formed steel channel beams with web holes were processed to compare with the curves of DSM capacity design formulas corresponding to cold-formed steel flexural members with web holes in North American Specification for the Design of Cold-formed Steel Structural Members(2016). It is shown by comparison that the DSM in NAS(2016) provides unconservative capacity predictions for most cold-formed steel channel beams with web holes, especially for beams whose failure mode is controlled by local buckling. Therefore, the modified DSM capacity design formulas for cold-formed steel channel beams with web holes were established on the basis of existing test results, finite element parametric analysis results and the calculation method of critical elastic buckling stresses.
Keywords:
web hole;cold-formed steel channel;flexural member;direct strength method;critical elastic buckling stress