Study on the Mechanical Properties of a Cable-Support Joint of Beam String Structure with Cantilever
In order to obtain the mechanical properties of a cable-support joint of beam string structure with cantilever under different working conditions,the stress and strain distribution characteristics of the joint during the tensile process were obtained by establishing a multi-scale finite element model and carrying out a field test,combining with an actual project of a long-span beam string structure.The ultimate bearing capacity and failure load of the joint were obtained through the local joint finite element analysis,and the structure and thickness of the joint were optimized according to its stress characteristics.The results show that the stress of the joint connecting to cable is within the elastic range during the construction and service stage,which fully meets the mechanical property requirements.The failure load of the joint is about 3.2 times of the design load combination,and its failure mode is tensile failure at the area of cable hole on lug plate.After optimization,the stress distribution of the joint is more uniform and reasonable,and the load bearing capacity is improved.
beam stringcable-support jointmulti-scale modelmechanical propertyfield test
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