The Mechanical Behavior Analysis And Pre-camber Setting Method Research Of The High And Low Tower Cable-stayed Bridge

The force and deformation characteristics of the high and low tower cable-stayedbridge during the construction phase and the state of bridge is different from ordinary twintower cable-stayed bridge due to its asymmetric structure.Based on the collection andsummary of the cable-stayed bridge in particular on the basis of the high and low towercable-stayed bridge theory,the paper does mechanical behavior analysis for instance bridgeaiming at the structure characteristics of high and low tower cable-stayed bridge andanalyses the mechanical behavior characteristics of its main tower and main beam in thestate of construction and a bridge,at the same time explores the the pre-camber settingsmethod.The main contents are as follows:1. On the basis of computational analysis research results of the cable-stayed bridge,the paper explores mechanical behavior analysis methods of the high and low towercable-stayed bridge and provides the basis of static structural response analysis for the highand low tower cable-stayed bridge on construction phase and completed bridge status.2．Based on the asymmetric structure of the high and low tower cable-stayed bridge,this paper establishes finite element model of a high and low tower cable-stayed bridge,analyses the deformation and force characteristics on the construction process andcompleted bridge state.3. For real bridge engineering, the article analyses the influence degree of structureweight, elastic modulus of concrete, initial tension of stay cables and concrete shrinkage,creep and other design parameters to the main beam deformation, and determines the maindesign parameters through camber sensitivity analysis.4．Aiming at the question of inconsistent cumulative displacement caused by the differentlength of the cantilever construction process about the high and low cable-stayed bridge, thearticle discusses the rationality of distributing girder camber using cosine curve and putsforward a new way of distributing girder camber using polynomials for the high and lowtower cable-stayed bridge girder.