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Reinforced concrete simply supported the Itabashi its structure is simple, convenient construction, a large number of small and medium-span highway bridges. With the extension of the service period, there have been a variety of diseases and injuries, resulting in decline in carrying capacity and to ensure that the vehicle is capable of safe passage, which requires detection techniques to study this type of bridge. Avon Hitotsubashi relying on research from the simply supported reinforced concrete slab bridge carrying capacity and the ability to use testing and assessment methods, to simply supported reinforced concrete slab bridge inspection and evaluation of the accumulation of experience and provide a reference. Specifically to carry out the work of the following aspects: 1. Investigation of the appearance of the disease, a bridge in Avon preliminary assessment of bridge conditions in accordance with the relevant norms. Assessed by visual inspection of the results of Avon a bridge for the four types of bridges, the technical condition of belonging to the \Maintenance focuses on: the bridge deck pavement, bridge deck drainage system, diaphragms, bearings, main beam, pier foundation concrete surface and the specific maintenance recommendations. Investigate the mechanical response of the reinforced concrete hollow slab bridge static loads and hollow Itabashi static load test of the technology, static load test example a bridge in Avon, through theoretical analysis, to ensure that the load test effect of the premise, to determine the static test load conditions, the use of large-scale finite element program Midas establish a finite element model of the bridge, the static load conditions structure control section measured strain and deformation compared with the theoretical value , calculate the calibration factor of the structure. Calibration coefficients to determine the the bridge actual carrying capacity. Load and the model is calculated. 3 In order to investigate the dynamic characteristics of reinforced concrete hollow slab bridge and reinforced concrete hollow slab bridge dynamic load test method, Avon a bridge, for example its dynamic load test, test the vibration characteristics of the bridge structure (frequency, damping ratios and mode shapes), as well as the structure of the forced vibration response (dynamic strain and acceleration), calculated the impact factor, and taken under the norms impact coefficient comparison with the theoretical design, the result for the maintenance and repair of the bridge transformation reinforced the decision-making to provide strong support. Bridge according to the three-dimensional dynamic finite element model established theoretical modal analysis and bridge dynamic response, and compared with the measured mode shapes, and the results show that the carrying capacity of the bridge to meet the design use requirements under the load.
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