Temperature-deformation coupled analysis method and system for concrete beam structures

A coupled analysis, concrete beam technology, applied in instrumentation, geometric CAD, calculation, etc., can solve problems such as complex temperature field, and achieve the effect of high calculation efficiency

Active Publication Date: 2019-10-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In fact, the internal temperature field of the concrete structure is extremely complex and multi-directionally coupled, which can be roughly simplified as a unidirectional temperature gradient, which is quite different from the actual situation

Method used

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  • Temperature-deformation coupled analysis method and system for concrete beam structures
  • Temperature-deformation coupled analysis method and system for concrete beam structures
  • Temperature-deformation coupled analysis method and system for concrete beam structures

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Embodiment 1

[0034] Embodiments of the present invention first disclose a temperature-deformation coupling analysis method for concrete beam structures, such as figure 1 shown, including:

[0035] Step S1, dividing the cross-section of the bridge and the ballastless track structure into thermodynamic planar units of nonlinear temperature field.

[0036] Step S2 , applying corresponding heat flux boundary conditions to the section to perform thermodynamic simulation analysis, and obtain temperature information of each thermodynamic plane unit. Among them, before the thermodynamic simulation analysis in this step, it also includes: converting solar radiation, convective heat transfer and radiation heat transfer into corresponding temperature loads and corresponding boundary conditions (for calculation methods, please refer to: Yan Bin, Liu Shi, Dai Gonglian, Pu Hao, Nonlinear temperature gradient and temperature load model of ballastless track in typical areas of my country, Journal of Railw...

Embodiment 2

[0053] Corresponding to the above method embodiments, this embodiment discloses a concrete beam structure temperature-deformation coupling analysis system, including the following first to fourth modules:

[0054] The first module is used to divide the cross section of bridge and ballastless track structure into thermodynamic planar elements with nonlinear temperature field.

[0055] The second module is used to apply the corresponding heat flux boundary conditions to the section for thermodynamic simulation analysis, and obtain the temperature information of each thermodynamic plane unit. Before performing thermodynamic simulation analysis, it is necessary to convert solar radiation, convective heat transfer and radiation heat transfer into heat flux boundary conditions and apply them to the model. In the thermodynamic simulation analysis of the second module, the hollow part of the bridge can be simulated as air flow for analysis.

[0056] The third module is used to calcul...

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Abstract

The invention relates to the technical field of applications in civil engineering, and discloses a temperature-deformation coupling analysis method and system for a concrete beam structure. The method comprises the following steps: dividing the cross section of bridges and ballastless track structures into thermodynamic plane units of a non-linear temperature field; applying corresponding heat flux density boundary conditions to the cross section, and implementing thermodynamic simulation analysis to obtain the temperature information of each thermodynamic plane unit; calculating the virtual linear expansion coefficient of each thermodynamic plane unit of the cross section under a first temperature load according to the temperature information of each thermodynamic plane unit; and in a stress model of the concrete beam structure, implementing temperature-deformation coupling analysis on the bridges and the ballastless track structures under the first temperature load according to the virtual linear expansion coefficient of each thermodynamic plane unit. According to the temperature-deformation coupling analysis method and system disclosed by the invention, the horizontal, vertical and longitudinal coupling deformation and bending of the beam structure under the complex temperature load can be considered accurately, and thus the temperature-deformation coupling analysis method and system can be widely applied to the applications in civil engineering.

Description

technical field [0001] The invention relates to the technical field of civil engineering applications, in particular to a temperature-deformation coupling analysis method and system for a concrete beam structure. Background technique [0002] The deformation of concrete beam structures caused by thermal expansion and contraction under the action of temperature is an important subject in the field of civil engineering research. [0003] Due to the poor thermal conductivity of concrete materials, in the process of heat exchange with the external environment, affected by factors such as geographical location, solar altitude angle, ambient temperature, wind speed, etc., the temperature distribution inside the concrete structure is not balanced, and there is a nonlinear temperature field. . Considering the shielding effect between complex concrete structures, the temperature field distribution is more complicated. [0004] For railway prestressed concrete bridges and ballastles...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/20G06F2119/08
Inventor 闫斌林智均赵宸君潘文彬何嘉成段兴超帅熊梁书韬
Owner CENT SOUTH UNIV
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