Construction of Prestressed Composite Beams to Eliminate Point Elevation and Falling Process During Construction of Continuous Composite Structure

摘要

The present invention can overcome the structural and functional defects due to the expansion joints and eliminate the expansion joints that are inevitably installed in the construction of the single-span prestressed composite structure constructed so far, And also to manufacture a new type of prestressed composite beam capable of greatly reducing the material. Further, in order to improve the difficulty of conveying and handling occurring when the length of the prestressed composite beam is made long, the composite beams can be divided and manufactured. The divided segments can be assembled, And a prestressed composite beam for inter-sideways interposition are successively integrated on a point. In order to achieve this purpose, a prestressing method corresponding to the tensile stress generated in the upper flange due to the moments of the inner flank due to dead load and live load in the continuous beam structure should be adopted. The method of constructing the continuous prestressed composite structure of the present invention has a complicated process such as rising and falling of a point and a problem of fixed end treatment in a manufacturing process. However, the final goal of the present invention is to solve the problem of the fixed end installation in the manufacturing process and to integrate the connecting portion between the continuous gait prestressing composite bobbles separated and manufactured in a short span without a complicated process of ascending and descending of the fulcrum portion. Accordingly, the problems of the expansion joint generated in the existing prestressed composite building structure are completely eliminated, and a construction method with high fatigue strength and high vibration resistance and favorable deflection is provided. It is a further object of the present invention to provide a method and apparatus for continuously reducing the maximum bending moment in the span due to its own weight and live load by significantly reducing the pre- And to provide a new prestressed continuous composite structure having an economic and safe cross section by introducing a split manufacturing method which is advantageous for handling.