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Establishment method for steel box beam welding residual stress and structural stress coupling calculation model

A technology of structural stress and residual stress, applied in the direction of calculation, design optimization/simulation, special data processing application, etc., can solve the problems of low calculation accuracy and inaccuracy, and achieve the effect of efficient calculation, accurate results and simple modeling

Pending Publication Date: 2018-12-07
SOUTHEAST UNIV
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, provide a method for establishing a coupling calculation model of steel box girder

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  • Establishment method for steel box beam welding residual stress and structural stress coupling calculation model
  • Establishment method for steel box beam welding residual stress and structural stress coupling calculation model
  • Establishment method for steel box beam welding residual stress and structural stress coupling calculation model

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Embodiment Construction

[0037] Embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0038] Such as figure 1 As shown, the present invention has designed a method for establishing a steel box girder welding residual stress and structural stress coupling calculation model, and the method specifically includes the following steps:

[0039] Step 1. Carry out limited simulation on the steel box girder system of long-span bridges, and establish a steel box girder segment model.

[0040] Based on ANSYS finite element analysis software, according to the design drawings and data of long-span bridge steel box girder structural system, the roof, roof longitudinal rib, bottom plate, bottom plate longitudinal rib, transverse diaphragm and web are all simulated by shell elements, and the mediastinal The plates are modeled with beam and shell elements according to the truss and solid web types, respectively.

[0041] In addition, the boundary conditions of ...

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Abstract

The invention discloses an establishment method for a steel box beam welding residual stress and structural stress coupling calculation model, which comprises the steps of: carrying out simulation ona long-span bridge steel box beam system, and establishing a steel box beam section model; by utilizing a submodel method, establishing a top plate longitudinal rib welding detail local fine model; embedding the obtained top plate longitudinal rib welding detail local fine model into the steel box beam section model to obtain an integral steel box beam multi-scale model; and by adopting a thermal-structural coupling method, carrying out simulation of a temperature field and a stress field in the top plate longitudinal rib welding process on the integral steel box beam multi-scale model and carrying out simulation of a vehicle load, and calculating to obtain a true stress time interval of steel box beam welding details. The establishment method is simple in modeling, efficient in calculation and accurate in result when being used for fatigue load effect analysis of a flat steel box beam, provides a more reasonable calculation model and establishment method for structural design of a large-scaled orthotropic steel bridge deck and fatigue design of welding details, has very high practical value and can be widely popularized and applied.

Description

technical field [0001] The invention relates to a method for establishing a coupling calculation model of steel box girder welding residual stress and structural stress, and belongs to the technical field of long-span bridge structure analysis and design. Background technique [0002] With the increasing span of bridge structures, structural forms with high strength and light weight performance have become the first choice for bridge construction. Flat steel box girder with orthotropic steel deck is gradually adopted as the main girder structure of long-span bridges due to its advantages of strong integrity, light weight, high bearing capacity, convenient construction and good aerodynamic performance. However, in recent years, the fatigue problem of steel box girders has become increasingly prominent. Fatigue has been found in Humen Bridge (completed in 1997), Jiangyin Yangtze River Bridge (completed in 1999) and Nanjing Yangtze River Second Bridge (completed in 2001). It i...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23G06F30/13
Inventor 丁幼亮钟雯宋永生
Owner SOUTHEAST UNIV
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