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Correction method for bridge finite element model

A finite element and model technology, which is applied in the field of bridge finite element model correction, can solve the problems of low correction efficiency and correction precision, achieve the effect of improving model correction precision, overcoming the difficult control of structural sensitivity calculation precision, and high precision

Inactive Publication Date: 2016-12-28
CHANGAN UNIV
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a bridge finite element model correction method, which can effectively solve the problems in the prior art, especially the low correction efficiency and correction accuracy of the existing bridge finite element model correction method

Method used

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  • Correction method for bridge finite element model
  • Correction method for bridge finite element model
  • Correction method for bridge finite element model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0073] Embodiment: Carry out finite element model correction with Baihugou Bridge as a solid bridge:

[0074] 1. First, confirm the physical bridge parameters and conduct actual measurement frequency:

[0075] 1. Determine the working condition of the bridge entity:

[0076] The span structure of Baihugou Bridge is a continuous beam of 40+72+45m. The beam body is a single-box single-chamber straight-web variable-section box girder with a deck width of 12m; the total length of the beam body is 163.5m; The distance between the center of the side support and the transverse bridge to the support is 5.6m; the 2m beam section in the middle of the mid-span and the 10.75m beam section at the end of the side span are equal-height beam sections with a beam height of 3.6m; the beam height at the middle support is 6.4m, Except for the zero block, the lower edge of the beam bottom of the other beam segments changes according to a quadratic parabola. The width of the top plate of the box...

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Abstract

The invention discloses a correction method for a bridge finite element model. Preliminary parameter optimization is completed by using an orthogonal design method, and then primary parameter correction is completed by using a uniform design method on the basis of the preliminarily optimized parameters. The method is less in finite element calculation frequency and can obtain the high-precision correction result so that the defect of excessively long time consumption of repeated iterative calculation in the correction process of a large finite element model can be avoided, and the efficiency of the correction work of the large finite element model can be enhanced. Then secondary correction is performed on the primary correction parameters by a response surface method, the primary correction result is further optimized, and the correction efficiency of the large finite element model of the bridge can be greatly enhanced by finite times of calculation. The response surface method acts as a mathematical analysis method of combination of experimental design and mathematical statistics and is feasible to be applied to correction of the finite element model of the large complex bridge structure so that high correction efficiency and correction precision can also be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of bridge finite element model correction, and in particular relates to a bridge finite element model correction method. Background technique [0002] As a key point of transportation, bridges play an extremely important role in our daily life. It is precisely because of the existence of bridges that the national road and railway transportation network can be connected, forming a transportation system extending in all directions, and the importance of bridges for urban transportation is also increasing day by day. In recent years, with the rapid development of our country's economy, our country has made great achievements in bridge construction. At the same time, bridge engineering is a project related to the safety of people's lives and property. Therefore, the health of bridges needs to be highly valued. However, with the increase of the service period of the bridge, the internal mechanism and materials o...

Claims

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Application Information

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IPC IPC(8): G06T17/20G06T19/20G06F17/50
CPCG06T17/20G06T19/20G06T2210/04G06F2111/06G06F30/23G06F30/13
Inventor 刘来君曹淑龙李晓孙维刚袁健栾守领陈月刘虹延张筱雨张夏
Owner CHANGAN UNIV
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