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The Research of Theoretical Analysis and Experiment on Expansion Reinforcing Strip

Author: ZuoYanLing
Tutor: YuDeHuï¼›ZhangTongBo
School: Qingdao Technological University
Course: Structural Engineering
Keywords: Long concrete structure Strengthening band Numerical Simulation Test monitoring The proposed calculation method
CLC: TU755
Type: Master's thesis
Year: 2009
Downloads: 18
Quote: 0
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Abstract


With the development of the long concrete structure, strengthening band as a realization the seamless design one of the methods of the long structure has been applied to the long structure. Due to the lack of existing norms to strengthen with the relevant provisions of the expansion, there is no detailed and complete terms of guidance for the design and construction, expansion strengthened with mostly rely on the experience of the method of construction, and there are a series of problems to be solved in practical applications. Based on this background, this paper from two aspects of the theoretical and experimental study on strengthening band. First, based on the principle of expansion of concrete shrinkage compensation, the analysis of the performance of the expansive concrete introduction expansion strengthened with the setting spacing strengthened with the basic calculation parameters and expansion, introduction expansion strengthened with the classification of its long structure concrete shrinkage basic theoretical basis. Secondly, the use of Ansys finite element analysis method, combined with the actual project, the establishment of a single layer of long concrete frame structure Ansys analysis model. Consider the dead weight of the frame structure, concrete shrinkage and expansion of the role equivalent to equivalent temperature difference temperature load is applied to the structural analysis of the long concrete structural beams, the stress and strain of the plate structure, the overall structure of the stress distribution characteristics and shrinkage deformation characteristics, strengthening band its left and right side of the structure of the stress distribution, analysis of expansion strengthened with the settings on the stress distribution of long structure. Third, with engineering examples, to limit the expansion of expansive concrete through the the field trials determination engineering data is compared with theoretical calculations, verify that limit the expansion to meet engineering requirements, the expansion rate and expansion of concrete under different restrictions determination and comparative analysis. Field strain test a long concrete structure will be the expansion strengthened with its side of the flat-slab concrete strain values ??were analyzed, the longitudinal and lateral points of the distribution characteristics of the strain values, Ansys calculated strain value distribution feature comparison analysis, the the verification structure in concrete tensile stress does not exceed the ultimate tensile strength, and finally using time series data prediction method to predict strain of concrete late development. Finally, based on the theory of reinforced concrete shrinkage the the long concrete structures contraction proposed calculation method. Actual project, calculate the actual contraction of the different parts of the long structure deformation and concrete strain, expansion and strengthening with measuring point theory to calculate the strain with the experimental test strain were analyzed. Sub-long structure to simplify the method to calculate data and Ansys calculated data with the experimental data, a linear regression analysis, the derived theoretical calculation of the recommended formula for engineering application.

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CLC: > Industrial Technology > Building Science > Construction > The project and the type of work > Concrete and reinforced concrete works
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