Analysis Of Transverse Flexural Strength And Rigidity Of Large-Span Double Deck

The transverse flexural strength and rigidity of large-span single deck is crucially important in the structure design and evaluation.Considering the weak transverse flexural rigidity of large-span single deck,transverse bulkheads and longitudinal bulkheads are arranged between two decks to form the large-span double deck.The main content of this paper is included as follows:(1)Study of structural design method of large-span single deck.(2)Analysis of flexural characteristics and structural stability of transverse bulkhead.(3)Optimization design of large-span double deck.According to the research content,this paper is conducted to analyse the flexural strength and rigidity of a certain large-span deck and discuss the structural design method of large-span single and double deck.The main conclusion of this paper is summarized as follows:(1)The bearing capacity as well as the transverse flexural rigidity of large-span single deck is insufficient.(2)The results of FE cabin model is the most accurate,which is similar to that of grillage girder model and three-span continuous beam model.And the results of single-span continuous beam model can be utilized as maximum and minimum stress and deformation in preliminary design.(3)The design method of transverse bulkhead is introduced in detail based on the strength,local and global stability conditions.(4)The design of large-span double deck can solve the problem of weak transverse flexural rigidity of large-span single deck.Furthermore,the critical spacing as well as the optimal curve of transverse bulkhead arrangement is obtained to meet a certain criteria.