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Construction Monitoring and Nonlinear Finite Element Analysis of Steel Reinforced Concrete Transition Truss Joints

Author: LiBaoMing
Tutor: YuanZhengQiang
School: Chongqing University
Course: Structural Engineering
Keywords: Steel reinforced concrete Truss Construction Monitoring Nonlinear Stress-strain
CLC: TU765
Type: Master's thesis
Year: 2009
Downloads: 95
Quote: 0
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Abstract


Steel reinforced concrete structure by the steel and outsourcing reinforced concrete to bear the load of the structure. Member section - beam configuration, the structure has a member section, large carrying capacity, good seismic performance, convenience advantages of construction; configuration of the cross-section of reinforced concrete to overcome section steel corrosion, rust, fire performance, high incidence of local and the overall instability of the shortcomings, the lateral stiffness, save steel, to reduce the cost [1,2]. The Guizhou Provincial office operations building for the engineering background of the project for the lower group floor, upper body Siamese, atrium hollow structure of complex high-rise building. The truss conversion layer span and the upper 13 floors vertical load acting on the truss above the truss node site structure complex and load transfer hub, is an important part of the bearing capacity and stiffness of the guarantee structure [3,4] . The the engineering steel truss construction monitoring; vibrating wire strain sensor and the engineering of the truss node solid finite element analysis using finite element analysis software ANSYS, final comparative analysis of the results of construction monitoring and finite element analysis , the main contents and conclusions are as follows: (1) the use of finite element analysis software ANSYS three-dimensional solid elastic and non-linear finite element analysis of the office building of steel reinforced concrete transfer layer truss node, obtained the stress and strain distribution of the truss, analysis results for the truss design provides a theoretical basis. (2) based on the finite element analysis results to determine the nodes of the truss construction monitoring program, to complete the installation and commissioning of the sensor, in every stage of the construction of the truss construction monitoring, and come to each construction stage truss node monitoring data results and the measured force node. (3) A comparative analysis of the test results and the calculated results of the the node construction monitoring test point, indicating that the elastic finite element analysis of steel strain with load growth is basically the same results with the measured strain results, but the results of elastic analysis of strain in the truss superstructure less than the measured strain results finished; consistent growth regularity and flexibility analysis of nonlinear analysis section steel strain, the various stages of strain values ??are greater than the elastic analysis results; confirms consider nonlinear concrete material force performance differences caused by The concrete unloading effect, that the concrete stress is reduced and the corresponding section steel stress increases the stress redistribution in law. (4) analyzed by comparing the different results of the impact of node performance of several parameters, indicating that the node concrete strength, improve force performance results to improve internal steel; the node internal steel steel plate thickness to improve beam of force have a significant impact . Nonlinear analysis method used in the text (5) provides a means to solve the complexity of such space nodes in the space under complex loading conditions of stress analysis problems more flexible analysis of the results of the analysis result of partial safety; nonlinear analysis the node internal stress and strain distribution can better guidance such as component design.

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CLC: > Industrial Technology > Building Science > Construction > The project and the type of work > Construction of housing structure
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