Analysis And Experimental Research In Prestressed Simple-continuous Beam Bridge

In recent years prestressed concrete continuous beam bridge is applied widely with strong rivalrousness. The structure of simply supported-continuous system is now common used in small span bridges and bridge approach of large span. In order to meet the demand of bridgework, we monitor and analyze the stress and the deflection during the process of bridge construction. Combining the Fourth Hanjiang Bridge in Xiangfan, this paper inquire into the computing and measuring method of stress and deflection. The main content of this paper is generalized as follows:1. Theoretical computing method and numerical simulated calculation. Using theory of structure intensity and prestressed concrete bridge, this paper reviews theoretical computing method of stress and deflection. Making use of the procedure of computing bridge structure, the structure of simply supported-continuous system is calculated and the result is analyzed, the character on force and deflection is generalized in the paper.2. Experimental analysis. In order to ascertain the real stress and deflection of structure this paper puts forward experimental scheme. By measuring data during the process of construction, we can know the distribution of stress in simply supported-continuous beam and compare with initial design, then we can adjust it by control method to ensure quality of the bridge.3. Approach design method and construction technology. Discuss bridge structure design and construction in aspect of concrete material, prestress design and technology of stretching reinforced bar.This paper provides theoretical basis for construction of the project and reference data for other similar bridges, gives a detailed description of experiment scheme and construction technology, accumulates initial data for further research on bridge.