Evaluation of the structural performance of tetragonal lattice girders SCIE SCOPUS KCI

Cited 4 time in WEB OF SCIENCE Cited 9 time in Scopus
Title
Evaluation of the structural performance of tetragonal lattice girders
Author(s)
Kim, Seungjun; Han, Taek-Hee; Baek, Jung-Sik; Kang, Young-Jong
KIOST Author(s)
Han, Taek Hee(한택희)
Publication Year
2013-03
Abstract
This paper presents an evaluation of the structural performance of tetragonal lattice girders for NATM tunnel construction. H-shaped steel ribs and triangular lattice girders have been widely used as a temporary support for NATM tunneling. H steel ribs have high flexural stiffness and strength, but they may induce unexpected internal gaps after shotcreting, because of their geometric characteristics. To overcome the problem, triangular lattice girders were developed. However, the lattice girder revealed frequent local failure at the joints of each bar. Moreover, those two supports show the quite low connection strength of members. Recently, a new type support, the tetragonal lattice girder, was developed to overcome the weaknesses of former supports. In this study, the structural performance of the new type support was studied by analytical and experimental methods. For the evaluation, 4-point flexural analysis, the conventional evaluation method, and arch analysis including stability analysis were performed. In addition, a 4-point flexural experiment was performed to evaluate the ultimate load carrying capacity, and observe whether local failure occurs or not. In the experimental study, a connected model was also considered as well as a unit model, in order to check the rationality of the connection method of the girder. All analytical and experimental results were compared with the structural performance of former supports.
ISSN
1598-2351
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/3221
DOI
10.1007/s13296-013-1004-y
Bibliographic Citation
INTERNATIONAL JOURNAL OF STEEL STRUCTURES, v.13, no.1, pp.31 - 47, 2013
Publisher
KOREAN SOC STEEL CONSTRUCTION-KSSC
Keywords
lattice girder; support; NATM tunnel; flexural test; arch
Type
Article
Language
English
Document Type
Article
Publisher
KOREAN SOC STEEL CONSTRUCTION-KSSC
Related Researcher
Research Interests

Structural Engineering,Composite Structure,Marine Energy,구조공학,합성구조,해양에너지

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