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Railway large-span cable-stayed bridge rigidity control method and cable-stayed bridge

A technology for stiffness control and cable-stayed bridges, applied in cable-stayed bridges, bridges, bridge forms, etc., can solve problems such as difficulty in controlling stiffness, inability to build railway long-span cable-stayed bridges, difficulty in controlling stiffness of long-span cable-stayed bridges, etc.

Inactive Publication Date: 2017-07-14
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for controlling the stiffness of long-span railway bridges in view of the difficulty in controlling the stiffness of long-span railway bridges in the prior art, resulting in the inability to build large-span railway bridges And cable-stayed bridge, the stiffness control method establishes a dynamic analysis model, and uses the dynamic analysis method to obtain the stiffness limit range and design parameter value range of the railway long-span cable-stayed bridge, so that the stiffness of the railway long-span cable-stayed bridge can be obtained Effective control provides a basis for the construction of long-span railway cable-stayed bridges, solves the technical problem that the stiffness of long-span cable-stayed bridges is difficult to control, promotes railway long-span cable-stayed bridges, and saves a lot of project investment costs

Method used

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  • Railway large-span cable-stayed bridge rigidity control method and cable-stayed bridge
  • Railway large-span cable-stayed bridge rigidity control method and cable-stayed bridge
  • Railway large-span cable-stayed bridge rigidity control method and cable-stayed bridge

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Effect test

Embodiment 1

[0150] The mixed embodiment is applied in the stiffness control process of the railway long-span cable-stayed bridge.

[0151] The rapid running of the vehicle will induce spatial vibration of the bridge structure. The structural dynamic characteristics are the premise of the structural dynamic response analysis. Through the analysis of the structural dynamic characteristics, the frequency distribution and mode shape characteristics of the structure can be understood, which provides a basis for the analysis of the coupled vibration of the vehicle-bridge system. material.

[0152] Stiffness control method of railway long-span cable-stayed bridge, establish dynamic analysis model, use finite element modeling, including bridge and vehicle model, adopt vehicle-bridge coupling vibration model, decompose vehicle-bridge system into Independent vehicle and bridge subsystems, so that when analyzing, analyze from the vehicle response and bridge response, the vehicle model is a CRH2 trai...

Embodiment 2

[0262] Railway long-span cable-stayed bridge, the railway long-span cable-stayed bridge obtained according to the stiffness control method of the railway long-span cable-stayed bridge of embodiment 1, the stiffness parameters of this railway long-span cable-stayed bridge include deflection-span ratio, main girder high-span Ratio, main beam width-span ratio and vibration fundamental frequency.

[0263] The deflection-span ratio includes the vertical deflection-span ratio and the lateral deflection-span ratio, and the lateral deflection-span ratio includes the lateral deflection-span ratio at the driving wind speed and the lateral deflection-span ratio at the design wind speed, and the parameter value of the deflection-span ratio satisfies the following scope:

[0264] Vertical deflection-span ratio: 1 / 300-1 / 1000;

[0265] Lateral deflection-span ratio at driving wind speed: less than 1 / 3000;

[0266] Lateral deflection-span ratio at design wind speed: 1 / 800-1 / 3000;

[0267] ...

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Abstract

The invention relates to the technical field of cable-stayed bridges, in particular to a railway large-span cable-stayed bridge rigidity control method and a cable-stayed bridge. The railway large-span cable-stayed bridge rigidity control method disclosed by the invention can analyze effect laws of structural rigidity parameters of the cable-stayed bridge on three aspects of bridge dynamic property, vehicle dynamic response and bridge dynamic response by establishing a dynamic analysis model and utilizing a dynamic analysis method. Meanwhile, the control method utilizes a vehicle-bridge system evaluation index system as indexes to judge to obtain a rigidity limit value range and a design parameter value range of the railway large-span cable-stayed bridge, so that rigidity and design parameters of the designed railway large-span cable-stayed bridge are in the limit ranges, the rigidity is controlled, the large-span cable-stayed bridge can meet a requirement for use performance, an important effect for popularizing the railway large-span cable-stayed bridge is achieved, and enormous cost is saved.

Description

technical field [0001] The invention relates to the technical field of cable-stayed bridges, in particular to a method for controlling the stiffness of a railway long-span cable-stayed bridge and the cable-stayed bridge. Background technique [0002] When a high-speed train passes a bridge, both the vehicle and the bridge will vibrate. Excessive vibration will affect driving safety and riding comfort. Bridge vibration is directly related to bridge stiffness. Therefore, the bridge must have certain vertical stiffness and lateral stiffness. , in order to ensure the safety of train driving and passenger comfort requirements. [0003] The indicators for evaluating vehicle running performance are mainly vehicle safety and vehicle stability. Vehicle safety mainly involves issues such as vehicle derailment and overturning that endanger driving safety. Vehicle dynamic response and bridge dynamic response indicators are used to evaluate the safety of train derailment. Running stabil...

Claims

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Application Information

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IPC IPC(8): G06F17/50E01D11/04
CPCE01D11/04G06F30/13G06F30/20
Inventor 陈克坚陈思孝许佑顶陈良江李锐曾永平李永乐戴胜勇陈天地袁明艾宗良
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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