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Experimental and Numerical Study on Flexural Mechanical Properties of New Stainless Steel Corrugated Plate
(1. Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092; 2. Key Laboratory of Geotechnical and Subsurface Engineering of the Ministry of Education, College of Transportation Engineering, Tongji University,Shanghai 200092)
Abstract In order to explore the advantages of new S32001 duplex stainless steel corrugated plate structure in the field of tunnel reinforcement, pure bending loading tests are conducted on a new type of stainless steel corrugated plate and the Q235 carbon steel corrugated plate. The mechanical responses of the two plates are compared and analyzed, and a 3D refined finite element model corresponding to the test is established to verify the rationality of the model and carry out sensitivity analysis. The results show that: (1) The maximum mid-span bending moment of the Q235 corrugated plate is 11.8 kN·m, and the maximum mid-span bending moment of the new stainless steel corrugated plate is 15 kN·m. The bending and load-bearing performance of the new stainless steel corrugated plate is better than that of the carbon structural steel corrugated plate, with higher stiffness and stronger ductility. (2) The section strain during the elastic deformation phase of the Q235 corrugated steel plate in the process of loading consorms to the plane cross-section assumption, but after entering the plastic phase, it no longer conforms due to the large plastic strain generated by the trough of the corrugated plate. The strain distribution along the height on the mid-span section of the new stainless steel corrugated plate basically conforms to the plane cross-section assumption. (3) The mid-span bending stiffness and the ultimate bearing capacity of the new stainless steel corrugated plate increase with the rise of axial force. When N=100 kN, the mid-span ultimate bending moment of the new stainless steel corrugated plate is 28.6% higher than that when N=0 kN.
Abstract：
In order to explore the advantages of new S32001 duplex stainless steel corrugated plate structure in the field of tunnel reinforcement, pure bending loading tests are conducted on a new type of stainless steel corrugated plate and the Q235 carbon steel corrugated plate. The mechanical responses of the two plates are compared and analyzed, and a 3D refined finite element model corresponding to the test is established to verify the rationality of the model and carry out sensitivity analysis. The results show that: (1) The maximum mid-span bending moment of the Q235 corrugated plate is 11.8 kN·m, and the maximum mid-span bending moment of the new stainless steel corrugated plate is 15 kN·m. The bending and load-bearing performance of the new stainless steel corrugated plate is better than that of the carbon structural steel corrugated plate, with higher stiffness and stronger ductility. (2) The section strain during the elastic deformation phase of the Q235 corrugated steel plate in the process of loading consorms to the plane cross-section assumption, but after entering the plastic phase, it no longer conforms due to the large plastic strain generated by the trough of the corrugated plate. The strain distribution along the height on the mid-span section of the new stainless steel corrugated plate basically conforms to the plane cross-section assumption. (3) The mid-span bending stiffness and the ultimate bearing capacity of the new stainless steel corrugated plate increase with the rise of axial force. When N=100 kN, the mid-span ultimate bending moment of the new stainless steel corrugated plate is 28.6% higher than that when N=0 kN.
GUO Yingjie1,
2 DING Wenqi1,
2 LI Xiaoran1 etc
.Experimental and Numerical Study on Flexural Mechanical Properties of New Stainless Steel Corrugated Plate[J] MODERN TUNNELLING TECHNOLOGY, 2023,V60(5): 262-268
2023, Vol. 60 