Constant Load State Analysis Of Rigid Support Continuous Beam Bridge

? ? ? ? ? The pretressed segmental reinforced concrete bridge is one type of primary structure of bridges in recent twenty years.It is important to optimize structure by computing internal force of main girder in design of concrete bridge.According to characteristics of bearing loads, the conditions and practices of contrete bridge erection, a series of hypothesis for simplification and many methods for the calculation are proposed. It is emphasized on comparing between the method of intenal force computing of concrete bridge of rigid bearing and the principle of minimal bend complementary energe for optimizing structure. And then,as a method of numerical value computing, the equation of three moment is described detailedly,so the internal force can be obtained expediently by using the method of chasing .Then take the uniform distributed load for example, the bridge structure can be optimized in terms of the principle of minimal bend complementary energe.It is found that reinforced concrete bridge under rigid bearing make the moment of main girder least,and this structure of state is perfectly optimized.At last, the internal force and the analysis of main girder are solved for the SanBaZhou prestressed reinforced concrete bridge under unvarying load by weaving programs. It shows that the of thinging is clear , and the method is very efficient in this example. So it is fully satisfied with the partial demand of engineering. ?...