Research On The Fluent Force Distribution Of Vertical Continual Shelving Structure With Huge Water Fluctuation And Its Influence To Wharf

When the Three Gorges Reservoir impounds, water level will go up, adjustment of local reach will occur and new river features which including water level difference greater than 30m, water depth greater than 20m, velocity greater than 5m / s will arise. In addition, with the Wharf Building become further large-scale, the building occupies larger water area and the velocity inevitably changes. Large-scale pile diameter creates greater anti- water. Large pile group largely changes flow regime existing in pure pile column, causes high water level around pile and serious change of water level, and makes fluent energy of partial river courses to transform into force to pile pole and lateral ties dock supports, which will bring about new test on distribution of lateral stress on Wharf Building and put forward question to traditional calculation method of bent.At present, acting force of horizontal and longitudinal ties dock of wharf is not considered in researches of resistance from fluent function. In the traditional structure design method of high pile wharf, calculation method of spatial structure simplified to plane bent is adopted and influence to wharf bent from lateral flow force is ignored. Besides, researches of stress on bent in the case of high Reynolds number in actual rivers are much rarer.This paper is an further deepening research and improvement to former Chongqing science and technology project "study on structure failure mode of all straight pile frame wharf of poor inland large water overhead upright type "This paper is carried out on the background of construction of graveness scientific special transportation infrastructure in the "eleventh five-year plan" in Chongqing, main contents of which contain design of big water level difference wharf in Chongqing port and project construction of key technology research and application. In the paper, the third-phase project of inch beach is used as the relied practical engineering. Base on finite element theory, flow field analysis software FLUENT and structural calculation software ANSYS are adopted to three-dimensional flow field simulation and spatial structure static analysis on continuous bent structure of poor inland large water overhead upright type in the actual conditions of high Reynolds number in this paper. Phenomenon of flow filed characteristics of single pile, series double pile and series of three pile in actual rivers, distribution characteristics of flow force of continuous bent structure are found. The results show that Reynolds number in actual rivers belongs to supercritical area, conclusions in flow pattern are different with what from most previous scholars' research on subcritical region, and there is no critical value and regularity poorer in Reynolds number. In view of flow force in great flow velocity, stress influences in the most unfavorable load of wharf structures are analyzed and suggested and to be made comparative analysis with what calculated by regulating method. The results show that safe is greater in the condition of using regulating method and leeway of design and structure optimization are existing.