Research on the Design Method of Compressive Bearing Capacity of Y-Type Cast Steel Joints
The compressive design bearing capacity formula(CDBCF)for Y-type cast steel joints under axial and small eccentric compression was derived,in addition,the CDBCF was verified by the experimental data of the full-scale experiment.The derivation process could be summarized as the following three steps:1)the ultimate bearing capacity formula(UBCF)of the simplified model of the joint was derived.The original joint was simplified to a mechanical model whose format of the bearing capacity formula could refer to that of the welded hollow spherical joint.Adopting the format of bearing capacity formula,a regression analysis was conducted based on the results of finite element analysis,to derive the UBCF of the simplified model that was under axial compression,bending moment and eccentric compression;2)the CDBCF of the numerical model of the joint was derived.According to the results of the importance analysis of the geometric parameters and the results of finite element analysis,and based on the UBCF of the simplified model,the CDBCF of the numerical model was derived for the numerical model that was under axial and small eccentric compression.By modifying the CDBCF of the numerical model in accordance with the requirements in Technical Specification for Application of Connections of Structural Steel Casting(CECS 235:2008),the final CDBCF for the Y-type cast steel joint was obtained;3)the CDBCF of the joint was verified.The full-scale experimental results of the joint were adopted to verify the CDBCF,and a comparison of the derived formula and the formula in CECS 235:2008 was conducted.
NETL
NSTL
万方数据
维普
