The Research On The Structural Feature And Construction Of Simply-Supported Continuous Bridge

With the development of freeways in our country, a large amount of bridges have been built, the structure and construction craft of bridges have been enriched. Those of muliti-span,middle-length(about 25-40 metres)are of high percentage among advanced bridges. High-speed driving demands good continuity and less expansion joints for the bridges, Simply-supported girder bridges with continuous decks are inferior to those of continuous girders because their decks crark easily. In another side, Owning to the complex construction of continuous girder bridges, which is laboursome and time-sonsuming, engineers have been thinking about an approach to combining the advantages of the two so as to speed up the building and reduce the work procedures. Thus the "simply-supported continuous bridge"is introduced.The simply-supported continuous bridge has been built abroad after 1960s, and it has been built in our country after 1980s. In the near future, The simply-supported continuous bridge has been spred, but many builders don't know about the structure and construction craft. The thesis has introduced the structure of the simply-supported continuous bridge at first,and then, it has inquired into some construction crafts, in finally, it has give directions to builders.The thesis has researched the simply-supported continuous bride of the ZHUQINGHE BRIDGE(the 6-50 m prestressing concrete simply-supported continuous T-Girder bridge) of the ZHENSHENG FREEWAY. After introducing basic theories of the simply-supported continuous bridge, pattern and designing the characteristics of the bridge,analyzed the performance of menchanics. Realized basic theories of the simply-supported continuous bridge, studied the variety of temperature, shrinking of concrete,creep of concrete under the construction craft.