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Inversion method of dynamic bearing capacity of plate girder bridge structure

A technology for slab bridges and bearing capacity, which is applied in the field of inversion of dynamic bearing capacity of slab bridge structures, can solve the problems that the influence is not considered, the structural damage assessment is not true, and the real force model cannot be obtained.

Active Publication Date: 2014-06-18
SHANGHAI TONGHAO CIVIL ENG CONSULTING
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Problems solved by technology

[0004] The invention discloses an inversion method for the dynamic bearing capacity of a slab bridge structure. The damage assessment of the structure is not real, and the disadvantages of not being able to obtain the real stress model

Method used

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  • Inversion method of dynamic bearing capacity of plate girder bridge structure
  • Inversion method of dynamic bearing capacity of plate girder bridge structure
  • Inversion method of dynamic bearing capacity of plate girder bridge structure

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with accompanying drawing and embodiment, but present embodiment is not intended to limit the present invention, and every adopt similar structure and method of the present invention and similar changes thereof, all should be included in the protection scope of the present invention.

[0041] Such as figure 1 , figure 2 As shown, for the structural system formed by the horizontal hinge of plate girders, it is stipulated that: the numbering of plates starts from 1 from left to right, and there are a total of n plates; the numbering of hinge joints starts from 1 from left to right, and there are n-1 in total A seam. The load on the slab is positive downward, its eccentricity takes the center of the slab as the origin, positive to the right, and positive downward for the displacement of the slab; the shear force of the hinge joint is positive in the direction shown in the figure, and the positive direct...

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Abstract

The invention relates to an inversion method of the dynamic bearing capacity of a plate girder bridge structure. According to the inversion method, the rigidity of hinge joints, the correction factor of the flexural rigidity of a plate and the correction factor of the torsional rigidity of the plate serve as inversion parameters, a system of linear equations is formed by establishing the relation between the inversion parameters and plate edge displacement, the number of the established equations is larger than that of unknown quantities under the condition that at least two tests are completed, and then the inversion parameters can be acquired through the least square method. By automatically meeting the condition that common accessory structures such as handrails, sidewalk slabs, road barriers and bridge decks exist on the bridge and taking the multiplicity and eccentricity of loads into account, the actual stress state of the plate girder bridge structure can be accurately simulated to acquire the real bearing capacity of the structure and the degradation process of members of the structure, and bases are provided for reinforcing design, bridge load limitation, dynamic bridge management and the like.

Description

technical field [0001] The invention relates to an inversion method for the dynamic bearing capacity of a slab girder bridge structure, which belongs to the technical field of bridge structure inversion in civil engineering. Background technique [0002] The slab girder bridge has the advantages of simple structure, clear force, convenient construction, mature technology, small building height, economical and practical, and has been widely used in highway and urban construction in our country. After long-term operation, whether the actual bearing capacity of these bridges can still meet the design standards is a topic of common concern to all bridge builders and managers. However, there will be various deviations during the construction process of the bridge, such as size, material, etc. are not completely consistent with the design; damage will occur during use, such as hinge joint damage or plate beam cracks; This assumption is simplified and so on. The existence of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 周正茂袁桂芳田清勇
Owner SHANGHAI TONGHAO CIVIL ENG CONSULTING
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