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A method for analyzing the stiffness of the lateral limit support of curved beams

A technology of stiffness analysis and lateral limit, which can be used in instrumentation, geometric CAD, calculation, etc., and can solve problems such as complex stress on main beams

Active Publication Date: 2019-07-23
CHINA COMM NORTH ROAD & BRIDGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the effects of preload, concrete shrinkage and creep, and temperature, the curved bridge will inevitably produce tangential displacement and radial displacement. More complex

Method used

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  • A method for analyzing the stiffness of the lateral limit support of curved beams
  • A method for analyzing the stiffness of the lateral limit support of curved beams
  • A method for analyzing the stiffness of the lateral limit support of curved beams

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Embodiment Construction

[0033] Embodiments of the method for analyzing the stiffness of the lateral limit support of a curved beam according to the present invention will be described below with reference to the accompanying drawings. Those skilled in the art would recognize that the described embodiments can be modified in various ways or combinations thereof without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims. Also, in this specification, the drawings are not drawn to scale, and like reference numerals denote like parts.

[0034] The external factors that cause the lateral displacement of the curved beam are mainly temperature difference, vehicle centrifugal force and impact force. The invention adopts the finite element method to comprehensively load the temperature load and the centrifugal force load of the vehicle, and analyzes the force of the lateral limit support, ...

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Abstract

The invention discloses an analysis method for lateral limit support stiffness of a curve beam. The method comprises the following steps of building a three-dimensional model of the curve beam by adopting a solid 90 unit in an ANSYS system; setting temperature field parameters including a heat transfer coefficient, specific heat, a concrete surface and air convection coefficient, concrete densityand a temperature gradient; performing grid division; according to different boundaries, applying temperature loads changed with time; solving a temperature field; by adopting a sequential coupling method, converting a thermodynamic analysis unit Solid 90 into a structural analysis unit Solid 95, and loading temperature field solving data as the temperature load together with a vehicle centrifugalforce; performing structural mechanic solving; and adjusting compressive stiffness of lateral limit support, repeating the step for adjusting the compressive stiffness of the lateral support and performing calculation, and comparing calculation results to obtain reasonable lateral limit support stiffness. The structural analysis is performed in combination with the centrifugal force based on thetemperature field analysis; temperature calculation data and centrifugal force data jointly serve as loads and are loaded for calculation; and the actual condition of the curve beam is better met.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a method for analyzing the stiffness of a lateral limit support of a curved beam. Background technique [0002] Due to the needs of route design, a large number of curved bridges have appeared in high-grade highways. The structural characteristics of curved bridges will cause beam cracking, bridge pier cracking, and beam cracking under loads such as temperature changes, concrete shrinkage and creep, and automobile centrifugal force. Lateral displacement of the body, that is, the hazards such as support voiding. Due to its inherent characteristics, the curved beam will not only produce displacement along the axis direction but also radial displacement under various loads. Such as beam body disease due to the large torque at the end of the curve section, rollover due to the accumulation of adverse temperature effects, and overpass rollover due to multiple heavy vehicles drivin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/23
Inventor 王超生杨伟威朱文博
Owner CHINA COMM NORTH ROAD & BRIDGE
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