| The prevailing conditions of the inland waterways improved greatly after thesuccess of impoundment of Three Gorges Reservoir. The changes of hydrologiccondition in reservoir area become the incoming issue. In order to adapt to thefluctuating backwater changes in hydrological conditions in the reservoir area,"largediameter, large-span" elevated structures will be a new major development in thereservoir area in the future. This essay is based on Naxigou Port in Chongqing. Itstudied the structure of large diameter, large-span overhead port in Three Gorges area.It also investigated the failure mechanism of structure, the pipe line of load and theweak structural parts under the impact of horizontal percussive force. This paperprovides some references for the popularization and application of large diameter,large-span overhead port in Three Gorges area.This essay created the numerical model of mooring dolphin structure andoverhead structure respectively in port planar construction by using effective modulusmethod which is from mechanics of complex materials and finite element software.This paper worked out the ultimate bearing capacity for the two different kinds ofbent structure in different periods by using nonlinear analysis. It imitated the failuremechanism, cracking development and weak structural parts of planar constructionunder the least favorable impact load in detail.This essay analyzed the ultimate bearing capacity under the level of impact inspatial structure minutely. It determined the least favorable impact conditions underthe level impact and discussed the destructive process of spatial structure. This paperanalyzed the weakest component element in large diameter, large-span overhead portand found the process of cracks in spatial structure. It made clear that the pipeline ofhorizontal force in the spatial structure. All of these provide bases for the constructionof spatial structure in Three Gorges area. |
PDF Full Text Request