Design of a large-span steel open-web sandwich panel roof in a certain museum
Taking the large-span steel open-web sandwich panel roof of a museum in Tianmen City,Hubei Province as an example,the design method and structural layout of the steel open-web sandwich panel were introduced.Based on the YJK model and SAP2000 model,the differences in deformation and stress of practical calculation methods and shell element finite element model calculation results and their reasons were analyzed.The stress performance of traditional square tube shear keys and new cross shear keys in open-web sandwich panel structures was compared and studied.The results show that the deflection results obtained by the practical method in this project are in good agreement with those obtained by the shell element finite element model.The practical method is difficult to consider the secondary bending moment,which will lead to a significantly smaller calculated stress of the compression plate compared to the shell element finite element model.The construction of shear keys has a certain impact on the structural stress.The stress of the chord connected by the new cross shear key is slightly smaller than that of the square tube shear key,and the stress concentration situation is more relaxed under certain conditions.By adding some stiffeners,the stress at the support end can be reduced.
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维普
