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Research on Characteristics of Force Transmission of Combination Part of Steel and Concrete of Steel-prestressed Concrete Composite Continuous Beam Bridge

Author: DuYang
Tutor: HeXiongJun
School: Wuhan University of Technology
Course: Roads and bridges to cross the river engineering
Keywords: Steel - prestressed concrete composite continuous beam bridge Space finite element Connections Steel - concrete joints Local analysis Stress distribution
CLC: U441
Type: Master's thesis
Year: 2011
Downloads: 121
Quote: 1
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Abstract


The steel - prestressed concrete mixed continuous beam bridge is a reasonable force, excellent performance, quick construction, but a new type of composite structure of the economy. It uses side span concrete box girder mid-span steel box girder design features in the application and development of a wide range of domestic and foreign steel - Prestressed Concrete mixed continuous steel-concrete composite beam bridge Ministry as its most critical structure, it requires steel beams and concrete beam connection into a the continuous joint force structure system in order to smooth the transfer of various loads. For steel-concrete composite steel - the prestressed concrete mixed continuous girder bridge in the Ministry of the study is not sufficient, the theoretical system is not perfect, which greatly affected the engineering applications of this excellent structural system. Based on the latest research results at home and abroad, drawing on the research technical information, research G318 National Highway the Longbridge Bridge Engineering background on the basis of steel - the prestressed concrete mixed continuous box girder bridge steel concrete composite segment, the The main contents are as follows: first summarizes the theory of the structure space finite element modeling and analysis of steel and concrete connection status quo, focus butt nailed PDL plates with holes, two of the most commonly used shear connection The pieces were related research at home and abroad on the stud welding and mechanical properties of the PDL plates with holes and bearing capacity formula, and a brief analysis of the form of their destruction. Secondly, the background of Changxing County G318 national highway Longbridge Bridge Project, Steel Mixed constructor, then according to its specific structure, the use of finite element analysis, respectively, of its steel mixed part of the passing moment, axial force, shear load condition, and explore the power transmission mechanism of steel-concrete composite section, the analysis shows the good performance of this steel-concrete composite, force transfer, in order to smooth the transfer loads. Finally, the space finite element analysis method for complex Longbridge Bridge steel concrete composite force, the establishment of a local finite element model of steel-concrete composite bridge segment, and the condition of the load cases analysis calculations. According to the calculation results, the analysis of the stress distribution of steel-concrete composite part exist, according to the analysis of the results showed that minority stress exceeds the allowable value, but under high stress concentration in a very small area, and the whole structure is smaller than the average state of stress segment of the overall use of the safe performance of the bridge, as well as the steel-concrete composite small.

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CLC: > Transportation > Road transport > Bridges and Culverts > Structural principles, structural mechanics
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