The Analysis Of Single-tower Self-anchored Suspension Bridge Static Characteristics

In recent years, self-anchored suspension bridge with linear beautiful, innovative and flexible siting and the appearance of more and more features being favored, a large number of large self-anchored suspension bridge span will have emerged. In order to ensure that self-anchored suspension bridge Oxfam bridge operator territories and the safety, making self-anchored suspension bridge structure of the more economically reasonable, the article Henan Tongbai single-tower self-anchored suspension bridge for engineering background, launched a large-span self-anchored Suspension Bridge structure and static properties, and research. The study of the paper work and the main results achieved are:(1) the geometric nonlinear theory. Suspension bridge is highly nonlinear geometric characteristics, mainly embodied in the internal force of the initial impact of the structure of large deformation, cable forces sag, and so on. In-plane unit from the unit stiffness matrix start, the introduction of stable function to amend stiffness matrix elements to consider a beam-effects, at the same time, from the balance equation start with cable, access to the internal forces of change and displacement between the increment relations, which have space cable element stiffness matrix and the nodes of the calculation method.(2) self-anchored suspension bridge linear analysis. According to the self-anchored suspension bridge construction characteristics, stiffening beam will be simplified rigid support for the continuous beam, the main cable and processing consider stiffening girder bridge into the role of co-linear effects based on the finite element model, using stiffening beams, booms themselves under the internal forces balance conditions to calculate the coordinates of the main cable tension and iterative calculation for the initial conditions until the accurate determination of the main suspension cable bridge alignment.(3) self-anchored suspension bridge construction process analysis. Suspension Bridge and the general small and medium-sized bridges across the Suspension Bridge is the difference between themselves and most of the load mainly by the main cable to bear. Particularly after the bridge under constant load and the boom of the main cable tension, bridge-should be consistent with the design goals. The main cable suspension bridge is great deformation of the bearing components, in the course of construction stiffening girder main cable and processing changes in the geometry of the very large, so this paper the construction phase inverse analysis (inverted demolition of) the establishment of the construction process finite element model. The first self-anchored suspension bridge cable beam after the special construction sequence, sequence and sling tension loading two dead load are particularly important time, the paper and discussed the constant contained two different timing and sling loading sequence Tension on the self-anchored suspension bridge effect.(4) structural parameters of the self-anchored suspension bridge static characteristics. Based on the finite element models of the main cable vector span, the main cable stiffness, stiffening stiffness, rigidity main tower structure parameters on the main cable-in deflection, stiffening in the cross-beam moment, the main cable standards such as static mechanical Rally performance impact.