The Research Of Theory Of Computation On The Damaged Bridges And Culverts Qin-ba Mountain

The mountainous area highway bridge is the damaged by flood resistance in highwayconstruction of facing difficult technical problems. This article through the investigation,theoretical analysis, indoor model test and numerical simulation analysis, the highway bridgeqinba mountain of damaged by flood and calculation theory for the evaluation of safety of astudy in many, the main contents are as follows:(1) According to the investigation of damaged bridges and culverts under the Qinbamountain areas, it is analsyzed the damaged type, characteristics, distribution regularity andinfluence factors. Of Qinba mountain bridges and culverts,From the mechanical behavior ofthe bridge structure to start, contrary to vary water depth, flow velocity, flow and erosion,floating debris and other states hitting the bridge structure analysis of mechanical properties,follow the structural strength and the power balance between the destructive flash floods andstability theory, it is analyzed the flash floods on the bridge of the failure mechanism, derivedout of the flood model calculation and checking, established the mechanical model of a flashflood destroyed the bridge, and identified the safety checking mode of the bridge flood.(2) According to Qinba nearly20years of rainfall intensity and the frequency damagedby flood relationship, to local hydrological data over the statistical analysis.Put forward thehighway bridge qinba mountain design flood frequency standards, and the improved threepoints, anticipate the peak flow of value at three, to the curve fitting, according to the standardinterpolation equation calculating, statistics a three peak flow of value. Frequencydistribution curve of the logarithmic curves linear. The calculation comparison, improve threepoints closer to the real situations more in line with the characteristics of qinba mountain.(3) According to weather and terrain environment for qinba characteristics, study thecharacteristics, the flood happened Qinba mountain flood biggest return period andcharacteristics; On the analysis of the existing evaluation calculation formula design floodflow in the applicability and parameter selected qinba is presented, based on the basis of thegeneral iteration method on the application of the Newton iterative formula of reasoning peakflow and confluence time, improved method for reasoning model, in order to adapt to thedemand of hydrological Qinba calculation, this paper puts forward a suitable for Qinbamountain flood the calculation method of design flow.(4) Corry out the rivers flow condition in the corner model tests, orthogonal bridge model experiment and backwater characteristics of the hegong bridge backwatercharacteristics model tests and backwater piers model tests, piers characteristics block watercharacteristics model test, culvert away can model test and ten days highway peace~hanzhong period of bridge model experiment, with the orthogonal bridge and the hegongbridge before the bridge pier, before the shock wave backwater height, bridge and the lengthof each QiaoKong upstream water flow rate distribution characteristics of comparison to findout the relationship between the two, for the bridge engineering design and constructionservices.(5) Base on the results of the survey and analysis of the hydrological calculation model,for Shi–Tian highway typical highway bridge structures, the application of numericalcalculation method, through the system of computer simulation and model test and inengineering verification and complement each other, and reveals the mechanism which qinbadamaged by flood.(6) On the basis of the theoretical studies of bridges and culverts damaged in analysisand evaluation of theory, against the complexity and ambiguity of the damaged bridges andculverts, combined the fuzzy mathematical methods with design of bridges and culvertsdamaged safety evaluation is established Water damage resistant design of safety evaluationSystem on Qinba mountain highway bridges and culverts damaged based on the theory offuzzy comprehensive evaluation.