Research Into Visualization Of Construction Control Of Beam Bridges

With the rapid development of China's highway and railway transportation, in order to span great rivers or bays or other barriers, a lot of different types of great bridges must be built. Beam bridges have being developed rapidly, are often built by segmental construction with the final bridge structure formation passing through many constructional segments (system transferring). Construction control is introduced to keep inner force and alignment of final bridge state approach to them of design. Structural analysis in construction can reflect structural behavior and can ascertain reasonable state of different segment so as to give prediction and monitoring in construction. But bridge is a complicated structure, a lot of resulting data will emerge in the bridge structure analysis. So We must read plenty of enormous data to know about bridge's stress^ strain and displacement. It will cost a lot of time and energy of designers and will reduce their efficiency. Visualization of scientific calculation is good to deal with data. It can transfer dull data into vivid and accurate diagram, which unties people from gruesome data.This paper researches into the construction control system of beam bridges by the object-oriented technique and Visual C++. It can transfer numerical result of bridge structural analysis into diagram and display bridge's reasonable state and structural behavior of different constructional segments. It provides a valid means to the construction control of beam bridges.In the first chapter, it expands the purpose and significance of the research problem, reviews the current status of the computer graphics and bridge CAD technology home and abroad, the development status of visual technique in the bridge construction control, and in the end summarizes the main work of the paper. In the second chapter, it elaborates the principles of beam bridges construction control. In the third chapter, it analyses the difficulty of soft engineering and shortcoming of conventional method, and discusses the principles of the object-oriented technique and other visual technique ofdeveloping soft. In the forth chapter, which is the kernel of this paper and embodies innovation of the paper's work, it analyses system by the object-oriented technique and builds the object model of beam bridge structure analysis, and implements foundation classes of system, and finishes design of data structure and interface layout of system, and introduces the method to implement graphic program in the system. In the last chapter, several valuable conclusions are summarized, some shortage and the future research orientation are also put forward at the same time.