Construction Technology For Preflexed Composite Continuous Bridge Of Shenzhen University City

The composite bridge by steel girder and concrete slab together with the steel plate bridge, PC, RC bridge equally all is the common used modern bridge. Compared with normal composite beam, steel concrete preflex prestressed composite beam posses many advantages in bearing capacity, rigidity, saving material, reducing depth of beam. It has been widely used. This kind of bridge structure stems from Europe. It was introduced to Japan in 1960's, and then to our country in the mid of 1980's. At present it is applied in many bridges in Japan and Korea. The complete design code, the construction standard and the technical standard have been established. In the overseas preflex beam bridge is not only used in simply supported beam but also extended to continuous beam.Our country is late in research about steel concrete preflex prestressed composite beam, but progresses in practical application are very quick. At present, domestic research broke through the general elastic stress design method in preflex composite beam. Design based on ultimate strength has been put forward. Analysis of time dependant effect is also fruitful. In field construction, technicians have also made very big progress. But the preflex composite bridge is mostly the simply supported beam. Few continuous beams have been used. A forecast according to the overseas development situation, it says that preflex composite beam structure will take some space in our country in the small span bridge structure in 21st century. Preflex composite beam structure will have opportunity for very big development.In this thesis, the construction of composite continuous beams by preflex steel and concrete (15+32+15m) in the municipal engineering of Shenzhen University is summarized in construction technology, construction process, bridge static loading and dynamic loading test. This thesis gives a particular description of steel beam fabrication, section construction of continuous beams of preflex steel and concrete, shear connector of steel and concrete composite structure, high strength bolt construction, prestressing force in composite continuous beams, static loading and dynamic loading test of the bridge, which would be useful for the design and construction...