Workers Combination Girder Bridge Resistance Load Capacity And Reinforcement

The situation, which the infrastructure of highway is rapidly developing and road transportation is growing with a great extent in China nowadays is the background of this thesis. The object of study is to enhance maintaining, strengthening and reconstruction of old bridges, improve bearing-capacity and the performance of vehicle, prolong its working fixed number of year according to the actual old bridges state of affairs. Improving the original design load of automobile 13 grade and truck 60 grade to the new load automobile 20 grade and trailer 100 grade of Xinge great bridge built in 1968, Shenyang By-pass Road is the purpose of this article.The scheme of strengthening guidance in is selected according to system assessment and analysis on field static and dynamic load tests of bridge, theoretical analysis, numerical value calculation. The scheme is ultimately confirmed after some parameters comparison of two different ways in light of characteristics, such as feasibility in technology and rational in economy. In order to meet the require of safety and economy, the scheme is analysed and calculated based on some quite essential theoretic foundation, the prime emphasis of the thesis is that the complex analyzing of bridge structure has been accomplished by using structural analysis program for general purpose and structural analysis program for expert purpose according to correlation of technique project criterion. The thesis is composed of six chapters, experiment of load test research, structural analysis before retrofit, compare of consolidation scheme, bear weight of calculation after retrofit, introduction and conclude. The significance of the research has two aspects. So far as the microcosmic aspect concerned, the applications of theory and technology mentioned above have been carefully studied, in company with a series of actual problems solved. In the generally speaking, the thesis offers a right pattern which is feasible in technical and rational in economy according to correlation of technique project criterion during the maintain period that a great deal of highway bridge is about to enter into or having entered into.