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Bunya Chea. Experimental and numerical study on cold-formed steel built-up box beams with different sections. Master's Degree(Engineering and Technology). Thammasat University. Thammasat University Library. : Thammasat University, 2016.
Experimental and numerical study on cold-formed steel built-up box beams with different sections
Name: Bunya Chea
keyword:
Built-up
LCSH:
Steel, Structural
;
Box beam
LCSH:
Cold-frames
LCSH:
Load factor design
Abstract:
Currently, the use of cold-formed steel member has been more popular even in developing country. It has been used for small and medium structures, especially roof structures. The built-up closed section is the most desirable section, since the torsional resistance of the built-up closed section is excellent in comparison of that of the single open section. Built-up box beam was considered in this research. The connection with self-drilling screws was chosen because it is more advantageous than the welding connection, in which the coating of cold-formed steel section may be destroyed by welding process. For the design specification, such as AISI 2012, the design method of the built-up is not clearly written. In this study, experimental study was focused to understand the flexural behavior of cold-formed steel built-up box beams composed of two face-to-face C sections. Built-up box beams made of five different C sections: C10012, C10015, C10019, C15012, and C15015 were tested. In addition, four different connection spacings equal to L/2, L/3, L/4, and L/6 (where L is representative span length) were chosen. Therefore, in the present test of the built-up box beams, there are 20 beam specimens. In the numerical study, a suitable finite element model was developed in order to compare with the experimental results. Initial geometry imperfection and geometrical/material nonlinearity were considered in the analysis. Both experimental results and those of finite element analysis showed that the capacity of the beam got higher when thickness of the section was increased and the connection spacing reduced. From the experimental results, the failure modes with connection spacing L/4 or smaller were local buckling, and the failure modes with connection spacing larger than L/4 were mixed modes of local buckling and distortional buckling, or lateral torsional buckling. The results from finite element analysis reasonably agreed with experimental results. Thus, the proposed computational modeling can be used to predict the behavior of the built-up box beam
Thammasat University. Thammasat University Library
Address:
BANGKOK
Email:
preserv@tu.ac.th
Name: Taweep Chaisomphob
Role:
advisor
Created:
2016
Modified:
2021-06-01
Issued:
2021-06-01
วิทยานิพนธ์/Thesis
application/pdf
eng
DegreeName: Master of Science
Level: Master's Degree
Descipline: Engineering and Technology
Grantor: Thammasat University
©copyrights Thammasat University
RightsAccess:
ใช้เวลา
0.027064 วินาที
Bunya Chea
| Title | Contributor | Type |
|---|---|---|
| Experimental and numerical study on cold-formed steel built-up box beams with different sections
มหาวิทยาลัยธรรมศาสตร์ Bunya Chea | Taweep Chaisomphob | วิทยานิพนธ์/Thesis |
Taweep Chaisomphob