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The Experimental Investigation on the Model of Long-span Prestressed Concrete Continuous Rigid-frame Bridges with High Pier

Author: CaoSheng
Tutor: LuoNa
School: Chang'an University
Course: Bridge and Tunnel Engineering
Keywords: - Span continuous rigid frame Model test Similarity theory Close programs Two dead load
CLC: U446.1
Type: Master's thesis
Year: 2011
Downloads: 62
Quote: 0
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Abstract


- Span prestressed concrete continuous rigid frame system bridge is a popular bridge type has a continuous beams and rigid features, modeling simple, linear and smooth. It is a bridge structure is commonly used in transportation construction system, its study is very practical significance. This type of bridge cantilever construction, the construction phase of construction is a complex nonlinear process plagued the design and construction of the bridge. Paper relies on the Shaanxi Province, Xi'an Highway Research Institute research projects - span continuous rigid frame bridge model test - span continuous rigid frame bridge computational analysis. Bridge is able to form an ideal linear, how to ensure that the structure formation in the construction of ideal linear model test is a good choice to solve the problem of the structural system. At present, continuous rigid frame closure segment disease is more serious, particularly important to study the closure section. Dead load due to continue to build high-speed rail in the second phase, the construction time of two loads the bridge internal forces state analysis of the impact is relatively important. How to seek better close programs and larger dead load reasonable load time is practical and realistic. The main contents: 1 to similarity theory based on the theory of model tests, according to the dimensional theory derived concentrated load, uniformly distributed load, Moment, similar to the model and the prototype similar to the stress, strain, deflection criterion . Model design, based on the project to determine the model cross-section, consider the prototype boundary conditions, and model manufacture. 2, to consider - span continuous rigid frame bridge construction of the system of non-linear characteristics, the whole process of simulation analysis, the stress and displacement of the structure under different conditions established based on the finite displacement method based on the project's construction. 3 Comparative test data on the model error analysis, numerical model results compared with measured data, error analysis, the establishment of a more accurate numerical model. Verify the design theory and software reasonable. 4, calculated by the model tests and numerical study - span continuous rigid frame system the bridge mechanical behavior and mechanical properties of, analysis of the bridge linear variation and structure of the overall performance, get a reasonable program of close construction methods, Pier Continuous Rigid structure-system bridges are able to achieve the expected linear and achieve synergy force. Analysis together and influencing factors, given the close construction recommendations. Analysis of two dead load load after closed bridge internal force state.

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CLC: > Transportation > Road transport > Bridges and Culverts > Bridge test observations with the test > Bridge test equipment
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