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A simplified method for in - plane buckling analysis of pylons of multi - span suspension b ridges was proposed. The analysis model is a pylon with an equivalent spring connected to it at the saddle. The stiffness of the equivalent spring was derived from the relation of the horizontal displacement at the saddle and restoring forces from the cables and was expressed with a simple formula . The stiffness...
Based on the finite element theory, taking a suspension footbridge for example, it is used the finite element analysis software called MIDAS/Civil builded bridge element model to carry out the static analysis, to research the influences of different sag-to-span ratio and the constrained way between the cable and the tower on static behavior of suspension. The results showed that, the cable stress...
Long-span multi-tower suspension, a new bridge system, is more adaptable to such geography condition as straits and bays, so the static wind load can not be ignored in the design and construction. As well as, the origin of performance difference between multi-tower suspension bridge and the traditional one is the existence of center towers. Therefore, property change of multi-tower suspension bridge...
Topological optimization method and the force tracing method was applied to find a better form for the main component of the special feature of Taizhou Yangtze River Highway Bridge, a triple-pylon suspension bridge, which is under construction in China. Combining with other modeling methods, the landscape design of Taizhou Yangtze River Highway Bridge is carried out and the final scheme is adopted...
Analytical methods for comprehensive evaluation of the seismic vulnerability of bridges have only recently become feasible due to a combination of advancements in the field of seismic hazard assessment and structural response analysis. However, current analytical methodologies, mainly based on fragility curves, may not be appropriate for the long-span multi-tower suspension bridge which belongs to...
The weakness in corrosion resistance and low load-carrying efficiency of steel cables have become the obstacles to the development of suspension bridge with longer spans. The CFRP (Carbon Fiber Reinforced Polymer) with special characteristics, such as light weight and excellent corrosion resistance, shows great advantages for the cable system of longer suspension bridge. In this paper, calculation...
Sanchaji Bridge over Xiangjiang River, located in Changsha, Hunan Province, China, is a self-anchored suspension bridge. The hangers of Sanchaji Bridge are installed in an unstrained state that is quite different from the traditional construction method. With the tension-compression and bending strain energy of stiffening girder and pylons as the objective function, the mechanical state of self-anchored...
Self-anchored suspension bridges are increasingly appreciated by engineers for their aesthetic look, low cost and more adaptive for geological environment than earth-anchored suspension bridges. Many self-anchored suspension bridges have been completed or are in construction in the world. For huge horizontal component of main cable force in the stiffening girder and the different construction method,...
The self-anchored suspension and cable-stayed combination system bridge is a new type of bridge which is aesthetic in appearance and skillful for the design. In order to analyze the mechanical behavior of the bridge on the process of system transformation, the model of spatial member finite elements was established. In addition the model test with the similarity ratio of 1:20 was carried out. Through...
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