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http://dx.doi.org/10.9711/KTAJ.2014.16.2.173

Analysis of segment lining cracking load considering axial force by varying boundary condition  

Lee, Gyu-Phil (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
Bae, Gyu-Jin (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
Kang, Tae-Sung (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
Chang, Soo-Ho (SAMPYO Construction & Engineering co. Ltd., R&D Department)
Choi, Soon-wook (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.16, no.2, 2014 , pp. 173-180 More about this Journal
Abstract
In the design of tunnel segment structure, axial and moment forces are considered as significant forces. Since axial force is much greater than moment force, the whole section of segment remains in compression. Therefore crack width can be reduced. But the axial force is not considered in criteria for serviceability check. This fact leads service condition more severe compared to ultimate condition and makes the required steel reinforcement increase to meet the serviceability criteria. In this study, the effect of axial force on serviceability of tunnel segment is evaluated, experimentally and analytically. Mock-up tests on segments with actual size were performed and investigated in terms of initial crack resistance. The evaluation proves that more comprehensive design could be achieved when the axial force is considered in the procedure for the serviceability check in design of tunnel segment.
Keywords
Shield tunnel; Segment; Axial force; Cracking load; Cracking moment;
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Times Cited By KSCI : 3  (Citation Analysis)
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