A Cable Adjustment Method for Cable Supported Bridges Based on Cable Length Influence Matrix

A technology that affects the matrix and cable length, applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of rigid cable adjustment procedures, large calculations, etc., to eliminate negative effects, reduce the number of adjustments, and eliminate height differences and the effect of corner difference

Active Publication Date: 2020-10-16
CHINA MAJOR BRIDGE ENERGINEERING
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Problems solved by technology

[0005] Aiming at the defects existing in the prior art, the object of the present invention is to provide a cable-supported bridge cable adjustment method based on the cable length influence matrix, which can solve the problems of large amount of calculation and rigid cable adjustment program in the existing cable adjustment method

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  • A Cable Adjustment Method for Cable Supported Bridges Based on Cable Length Influence Matrix
  • A Cable Adjustment Method for Cable Supported Bridges Based on Cable Length Influence Matrix
  • A Cable Adjustment Method for Cable Supported Bridges Based on Cable Length Influence Matrix

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Embodiment Construction

[0039] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0040] see figure 1 , figure 2 As shown, the embodiment of the present invention provides a cable adjustment method for cable-supported bridges based on the cable length influence matrix, and the facade layout diagram of the actually constructed bridge is as follows image 3 shown.

[0041] The embodiment of the present invention is based on the cable length influence matrix cable-supported bridge cable adjustment method comprising the following steps:

[0042] S1. Obtain the cable length L of all cables 0 , the initial value y of each control item 0 , input {L 0} n×1 and {y 0} m×1 , to establish a finite element model, where n is the number of times that the cable needs to be adjusted, and m is the number of control items that need to be adjusted;

[0043] S2. Stretch all the cables to a certain length in sequence according to the c...

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Abstract

The invention discloses a cable-adjusting method for a cable-supported bridge on basis of a cable-length influence matrix, relating to the technical field of bridge engineering. The cable-adjusting method comprises the following steps: determining an initial state; tensioning inhaul cables according to cable lengths and calculating an output influence matrix; determining the maximum pulled-out amount and maximum releasing amount allowed by adjustments of all cable lengths; determining target values, allowed positive deviations, negative deviations and weight coefficients of control items; determining an optimized target function according to an optimization target which the method needs to meet; defining a concrete constraint condition according to the optimized objective function in the above step in order to obtain pulled-out amounts of all the inhaul cables and final values of control items to adjust cables. According to a catenary theory, the cable-adjusting method for a cable-supported bridge on basis of a cable-length influence matrix calculates the cable-length influence matrix and includes the cable-length influence matrix into geometric nonlinearity effect. Therefore, theinhaul cables can be quickly adjusted in the target state.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a cable adjustment method for a cable-supported bridge based on a cable length influence matrix. Background technique [0002] Cable-supported bridges have the characteristics of large sag and significant geometric nonlinear effects in the low-stress state of the cables. As the stress in the cable increases, the gravitational stiffness of the cable increases accordingly, and the geometric nonlinear effect of the structure is gradually eliminated. [0003] Most of the current calculations before cable adjustment are based on the characteristics of large dead-load stress and insignificant geometric nonlinear effects after the completion of the bridge. The cable force influence matrix is ​​used for cable adjustment of the whole bridge, and better results can be obtained. However, in cable-supported bridges with low cable stress and obvious sag effect, due to the prominen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/13G06F30/23E01D21/00G06F119/14
CPCE01D21/00G06F30/13G06F30/23G06F2119/06
Inventor 何东升易伦雄肖海珠康晋梅大鹏朱运河
Owner CHINA MAJOR BRIDGE ENERGINEERING
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