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The Analysis and Safety Evaluation of the Joint of Steel and Concrete Box Girder of Chongqing Shibanbo Changjiang Widen Reconstructed Bridge

Author: LiTao
Tutor: YangZuo
School: Chongqing University
Course: Civil Engineering
Keywords: Steel - concrete joints PBL shear connectors Safety assessment Force characteristics
CLC: U441
Type: Master's thesis
Year: 2011
Downloads: 45
Quote: 0
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Abstract


Steel - concrete composite beam optimization of material properties of steel and concrete , and its function depends on the degree of combination between the steel beams and concrete beams , closely related to the combination of the degree of the joints between the steel and the concrete shear connector PBL shear key bridge steel - concrete joints shear connector . Currently , relatively few studies of PBL shear key and steel - concrete joints , its force performance and simulation analysis still needs further study . Yangtze River Bridge, double-track bridge to Shibanpo steel - concrete joint engineering background research on the application of finite element analysis program on steel - concrete joints and PBL shear key force performance under static and dynamic loads , the bridge steel - concrete joint local security state assessment , the main contents include : ( 1 ) using the general purpose finite element program ABAQUS steel - concrete joints monolithic PBL shear connector finite element model , consider the PBL steel plate openings in concrete and reinforced throughout the shear pin up role. Analog low cycle cyclic loads and monotonic loading tests , analysis of the performance of the connection and the main influencing factors between the shear plate and concrete shear key load - displacement skeleton curve analysis for steel - concrete joint power recovery force model ; ② according to the design data analysis and steel - concrete joint test report analyzes the typical static load case steel - concrete joint force characteristics of the local effects of the distribution of steel - concrete joint stress and shear plate and concrete the relative displacement and compared with the experimental results verify the effectiveness of the finite element model of this paper ; ③ use SAP2000 to establish a model of the entire bridge structure , selected three groups of three seismic waves , its momentum , steel - concrete joints at both ends of the cross-section of the internal forces time . Using ABAQUS establish a local model of the steel - concrete joints , the stress distribution in the earthquake , and the relative displacement of the SAP calculation of a set of internal forces time the role to steel - concrete joints of steel - concrete joints and connections unit ; ④ steel - concrete joint static and dynamic finite element analysis results , determine a reasonable threshold of alarm , local security state assessment of the bridge 's steel - concrete joints .

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