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Static and Dynamical Characteristic Analysis and Experimental Investigation on Large Span Half-through CFST Arch Bridges

Author: HuangJiXiao
Tutor: HaoXianWu
School: Chang'an University
Course: Bridge and Tunnel Engineering
Keywords: Large span Borne CFST Arch Bridge Dynamic characteristics Seismic performance Static characteristics Elastic stability Load test
CLC: U441.3
Type: Master's thesis
Year: 2011
Downloads: 53
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Abstract


CFST Arch Bridge to the large span light of the direction of development, but at home and abroad but not CFST arch bridge design and construction norms and procedures, and the applicability of the norms of the existing bridge span is not more than 200m, unable to meet the large span steel concrete arch bridge design and construction needs. Static and dynamic characteristics of Large Span CFST Arch is very urgent. A span up to 280m span in through CFST arch bridge, using the finite element calculation software Midas Civil establish a full-bridge space static and dynamic analysis of mechanical model for the span in through CFST arch bridge static and dynamic The school features and flexibility stable performance and seismic performance study, the results can provide a reference for Large Span CFST Arch Bridge design. In this paper, the specific research include the following aspects: 1, full-bridge space finite element model to analyze the static mechanical properties of a large mid-span through CFST arch bridge considering the construction phase, pointed out that the construction phase should take full account of the large span CFST Arch Bridge The displacement of the influence of deformation. Study span through CFST arch bridge design load cases under static instability process, discusses the dead load, automobile live load, the crowd live load, wind load structure elastic stability, pointing out that the dead load as The main load of the structure of the control action from the variation of the structure of elastic stability safety factor. Structural dynamics calculation method based on the span in through CFST arch bridge natural frequencies and modes that span in through CFST arch bridge of plane stiffness is less than a plane stiffness difference . Response spectrum method and the method of dynamic time span in through CFST arch bridge seismic performance comparison of two methods of seismic analysis and structural seismic response under seismic loads of different directions, pointing out that on The complex structure of large-span CFST Arch Bridge using dynamic time history analysis in the seismic design of the high-intensity area should the law and should be considered to the three-dimensional vibration input. 3, the large mid-span through CFST Arch Bridge bridge load test, compared to theoretical calculation results and bridge test measured results, that the working condition of the bridge and the mechanical performance to meet the regulatory requirements.

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CLC: > Transportation > Road transport > Bridges and Culverts > Structural principles, structural mechanics > Bridge vibration and damping device
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