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A method for measuring the effect of bolt slippage on the bearing capacity of steel structures

A steel structure bearing and bolt slippage technology, which is applied in the direction of instruments, calculations, and electrical digital data processing, can solve the problem that there is no effective method for simulating bolt slippage, so as to enhance calculation convergence, ensure calculation accuracy, and improve calculation accuracy. The effect of efficiency

Active Publication Date: 2016-05-04
STATE GRID HUNAN ELECTRIC POWER +2
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AI Technical Summary

Problems solved by technology

[0006] The research on bolt slippage of steel structures is concentrated on the bolt slippage test and the calculation and simulation of bolt preload friction force. However, from the perspective of the entire steel structure, there is no effective method for how to simulate bolt slippage in load calculations.

Method used

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  • A method for measuring the effect of bolt slippage on the bearing capacity of steel structures
  • A method for measuring the effect of bolt slippage on the bearing capacity of steel structures
  • A method for measuring the effect of bolt slippage on the bearing capacity of steel structures

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Embodiment Construction

[0021] Such as figure 2 Shown, the inventive method comprises the following steps:

[0022] The first step is to test the bolt slippage parameters;

[0023] According to the connection type of the bolt, the slip load, gap slippage, yield load and deformation corresponding to the yield load of the bolt are tested.

[0024] The second step is to calculate the bolt slip load deformation curve;

[0025] Substitute the above parameters into the load-deformation function of deformation slip and the load-deformation function of gap slip respectively to calculate the load-deformation curve.

[0026] The third step is to modify the constitutive model of steel structure materials;

[0027] According to the calculated bolt slip load deformation curve, combined with the material properties of the bolted steel structure, the material constitutive model is corrected.

[0028] The fourth step is the material nonlinear calculation setting;

[0029] In the finite element calculation soft...

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Abstract

The invention discloses a method for measuring influences of bolt sliding on steel structure load-bearing. The method includes in finite element calculation of steel structure load-bearing, by testing bolt sliding parameters, according to an existing bolt sliding model, calculating a bolt sliding load-deformation curve, amending a steel structure material constitutive model, adding a stress and strain relaxation section to an elastic deformation section of a stress and strain curve of the steel structure material constitutive model, enabling local geometric nonlinearity caused by steel structure bolt sliding to be equivalent to material nonlinearity, and conveniently calculating the influences of bolt sliding on load bearing of a steel structure. By the method, the steel structure bolt sliding calculation process is simplified, calculation convergence is enhanced, calculation efficiency is improved, and calculation accuracy is guaranteed well.

Description

technical field [0001] The invention relates to the field of load-bearing analysis of steel structures, in particular to a method for measuring the influence of bolt slippage on the load-bearing of steel structures. Background technique [0002] General steel structure literature thinks that ordinary bolts are not suitable for shear connections, but ordinary bolts are widely used as shear connections in transmission towers. For this kind of joint construction form, the design codes of various countries in the world only give its strength design formula, without considering the influence of connection slip deformation. Since the bolt pre-tightening force in the transmission tower is usually small, and there is a structural gap between the bolt and the bolt hole, the relative sliding between the connecting part and the connected part is very easy to occur at the bolt connection part, and a large number of true tower tests It shows that the slippage phenomenon of bolted joints...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 刘纯唐远富欧阳克俭陈红冬
Owner STATE GRID HUNAN ELECTRIC POWER
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