Structural Behavior Study On Short Suspenders Of Half Through Arch Bridges With Large Span

The practice proves that it needs to be further discussed that the flexible suspenders of a large-span half through bridge are designed as axial tension members. In this thesis, it is discussed such as dead load, moving load, change of temperature, shrinkage, creep, vibration of bridge structures, joint form of suspenders, natural frequency of suspenders and construction errors that affects the load condition of suspenders. The equivalent elastic modulus of strandwire is conducted. And its solid finite element model is built up by a large-scale FEM software, ALGOR, by which we can accurately simulate the mechanical characteristics of strandwire. Then the solid finite element model and the integrated finite element model of suspenders are built up. According to the integrated finite element of entire bridge calculation method , the integrated finite element model of entire bridge of Yibin Nanmen Bridge is built up based on its construction drawings , and its short strandwire suspenders are comparatively deeply studied. The stress of strandwire in short suspenders is mainly calculated under dead load, moving load and change of temperature. On the basis of calculation of the strandwire suspenders damaged and the knowledge on fatigue, the formula of the wellphased life estimation shortest suspenders is produced.