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http://dx.doi.org/10.9711/KTAJ.2019.21.6.897

Performance evaluation of high-performance lattice girder using numerical analysis  

Kim, Dong-Gyou (Department of Infrastructure Safety Research, Korea Institute of Civil Engineering and Building Technology)
Ahn, Sungyoull (SYTEC Co.)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.21, no.6, 2019 , pp. 897-908 More about this Journal
Abstract
The objective of this study is to evaluate the field support performance of highperformance lattice girder (BK-Lattice Girder) by using numerical analysis. Three types (50, 70, 95-type) of existing and high performance lattice girders were applied to the cross section of highway 2, 3, and 4 lane tunnels to compare the supporting performance. The numerical analysis was the finite element method and the lattice girder was modeled in three dimensions with an elasto-plastic frame. The ground was modeled as a spring receiving only compression. The load was applied as a concentrated load on the central ceiling of the tunnel section. The yield strengths of the lattice girders were determined from the numerical results to compare the supporting performance of lattice girder. In case of 50-type, the yield strengths of high-performance lattice girders were increased by 6.7~10.0% compared with those of the existing lattice girders. In the case of 70-type, the high-performance lattice girders increased yield strengths by 12.1~14.9% than the existing lattice girder. In the case of 95-type, the high-performance lattice girders increased yield strengths by 13.3~20.0% than the existing lattice girder. As a result of numerical analysis, it was considered that the high-performance lattice girder supported better than the existing lattice girder when only the lattice girders were constructed.
Keywords
Tunnel; Lattice girder; Yield strength; Performance; Numerical analysis;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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