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01 April 2003, Volume 37 Issue 04 Previous Issue    Next Issue

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Influence of Intermediate Principal Stress on the Ultimate Bearing Capacity of Foundation ZHOU Xiao-ping, WANG Jian-hua 2003, 37 (04):  552-555.  doi: 10.16183/j.cnki.jsjtu.2003.04.020 Abstract ( 415 )   HTML ( 367 )   PDF (180KB) ( 203 )   Save The ultimate bearing capacity of foundation based on Mohr-Coulomb strength criterion does not consider the influence of intermediate principal stress on yield and failure of soil. In this paper, the influence of mean principal stress on the ultimate bearing capacity of foundation was taken into account based on twin shear strength theory. Formulae were derived with the influence of soils cohesive strength, over-burden loads on both sides of foundation and the self weight of soils. Taking strip foundation as an example, the influence of intermediate principal stress on the ultimate bearing capacity of foundation was calculated. The ultimate bearing capacity of foundation will be improved, when the influence of intermediate principal stress on the bearing capacity of foundation is considered. Figures and Tables | References | Related Articles | Metrics

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3-D FEM Analysis on Prefabricated Segment Joints of Shield Tunnel ZHANG Hou-mei, ZHANG Zheng-lin, WANG Jian-hua 2003, 37 (04):  566-569.  doi: 10.16183/j.cnki.jsjtu.2003.04.023 Abstract ( 492 )   HTML ( 11 )   PDF (173KB) ( 346 )   Save The double lines strengthening elastic-plastic model was developed by simplifying the concrete constitutive law according to Saenz formula. The formulae for the model parameters were given. The structural analysis procedure Algor was taken to conduct the linear elastic and elastic-plastic FEM analysis on the joints of segments. The strain distribution of segment, the displacement of joints, the rotary angle of joints and the tensile force of joint bolts were given. The comparison between FEM calculation and test results was made, which shows that the finite element analysis results correspond with the test results. The FEM analysis results can bean effective measure to observe the distribution patterns of the strain and stress. Figures and Tables | References | Related Articles | Metrics