Abstract This paper presents the deficiencies of the calculation method for the bearing capacity of SFRC underground structures in Chinese code, compares it with the Eurocode through case studies and gives relevant suggestions. The results show that: 1) the design methods and calculation formulas in the Chinese code and Eurocode are roughly the same in respect to the ultimate bearing capacity of normal sections, while they are different in the bearing capacity of oblique sections-the shearing resistance of the bending beam under the Chinese code is greater than that under the Eurocode, and the higher the beam height and the concrete grade, the greater the difference; 2) the Eurocode not only considers the shearing resistance of longitudinal tensile reinforcement but also has a greater influence coefficient of axial compressive force compared with the Chinese code; and 3) crack width can be reduced by 10% at a serviceability limit state under the national code, but much less than 60% under the Eurocode, and this is one of the main influence factors of the reinforcement ratio.
Abstract：
This paper presents the deficiencies of the calculation method for the bearing capacity of SFRC underground structures in Chinese code, compares it with the Eurocode through case studies and gives relevant suggestions. The results show that: 1) the design methods and calculation formulas in the Chinese code and Eurocode are roughly the same in respect to the ultimate bearing capacity of normal sections, while they are different in the bearing capacity of oblique sections-the shearing resistance of the bending beam under the Chinese code is greater than that under the Eurocode, and the higher the beam height and the concrete grade, the greater the difference; 2) the Eurocode not only considers the shearing resistance of longitudinal tensile reinforcement but also has a greater influence coefficient of axial compressive force compared with the Chinese code; and 3) crack width can be reduced by 10% at a serviceability limit state under the national code, but much less than 60% under the Eurocode, and this is one of the main influence factors of the reinforcement ratio.
WANG Shuai-Shuai,
GAO ,
BO etc
.Calculation Methods for the Bearing Capacity of SFRC Underground Structure Members[J] MODERN TUNNELLING TECHNOLOGY, 2015,V52(5): 1-9
2015, Vol. 52 