Yellow River Conservancy Will Design Institute Office Post-tensioned Concrete Beam Design

With the development of national economy, the country has more and more high expectations for structure of the building. Present structure not only request big span, high strength, require beautiful and light and handy at practibility, Still demand to have good economic benefits. The ordinary structure of armored concrete can't already meet the demands .The technology of post-drawing unbonded prestressed concrete is a new technology that our country develops in more than nearly ten years, It has improved original technology. With the development of science and technology, the improvement of the engineering level of the construction, a lot of new technologies, new crafts have already been used to construction progressively.The application of these new technologies, new crafts , not merely make the construction craft greatly simplified, make a lot of complicated structure difficult problems be solved too at the same time .This paper has done the survey and summarize to developing history and current situation of the domestic and international pre-stress structure at first, and have pointed out the existing problem in the present pre-stress structure project practice,Compared with and analysed the pluses and minuses of various kinds of pre-stress technology, have explained receiving strength of pre-stress structure, and pieces of law pre-stressstructure scope of application and characteristic of structure after pointing out.A pre-stress structure of concrete is designed after explaining in detailed the actual project and carried on concrete implementation. The pre-stressing project has been calculated concretly to set a roof beam in place to the frame of main building. Whether it is at the same time to after pieces of law pre-stress concrete construction the crafts and management go on in detail describing, made the structure improved in many aspects finally and the fine result. To post-drawing pre-stress technology carry on it have important theory the meanings and project using value of with deep research.