简支转连续梁桥预应力优化设计-工程力学专业论文.docxVIP

武汉理工大学硕士学位论文Abstract 武汉理工大学硕士学位论文 Abstract With the development of science and technology and communication，due to their convenient construction，economical cost，reasonable force character and comfortable driving，pre—stressed continuous beam bridge have made a rapid progress in recent years，and become one of the most competitive bridge types Among the several kinds of regular construction methods of beam bridge，the method of the simply supported—continuous construction is a kind of effective and economical one，compared with the pre—stressed continuous beam bridge，its cost is much lower,and it is a kind of more excellent construction methods．It overcomes the fracture of the joint only with the ordinary steel，and the non—harmony issue of the strain and stress between the structures under different force．It also strengthens the stress store of the joint between the beams，and assures the continuous and whole capability of the bridge．In order to guarantee enough stress store，good continuity and continuum，the pre—stressed tensile force between the beams becomes a more important subject．On the basis of studying and summarizing former research work， this text carries Oil deep analysis and research to the pre—stressed tension in the course of the transition of the system． The text reviews the current situation of the research and discusses the character of the pre—stressed simply supported—continuous bridge，then the text analyses the rationality of the force and puts forward the topic of research，that is to say,in the course of the transition of the system，the rational configuration of the pre—stressed tensile parameter will exert 01l important influence to the constructed bridge． In the course ofthe transition ofthe system，the text does theoretical analysis on the calculation ofthe displacement and the force．Combined with the project practice of the Han-jiang four bridge，the text makes the analysis on the every stage of the construction in the course of the transition of th