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Force density finite element mixing method used for rope-pole-beam mixed system form-finding

A force density, finite element technology, used in special data processing applications, instruments, electrical digital data processing, etc.

Inactive Publication Date: 2013-11-20
SHANGHAI TONGLEI CIVIL ENG TECH +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0006] To sum up, for the hybrid structure system containing cable-rod-beam, there are certain geometric errors in form-finding by nonlinear finite element method, and the force density method is only applicable to the cable-rod system

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  • Force density finite element mixing method used for rope-pole-beam mixed system form-finding
  • Force density finite element mixing method used for rope-pole-beam mixed system form-finding
  • Force density finite element mixing method used for rope-pole-beam mixed system form-finding

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Embodiment Construction

[0019] In order to make the technical means, technical features, invention objectives and technical effects realized by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0020] (1) figure 1 The building structure shown is a complex hybrid structure of cable-rod-beam system, and its flexible cable-rod system is two hyperboloid cable nets with a height of 40m, a diameter of 32mm in the warp direction, and a diameter of 32mm in the weft direction. 24mm, the supporting system is two sail-like double-layer grid structures and the lower frame, with a total height of 50m;

[0021] figure 2 Shown is the flexible cable network of the building structure and its surrounding supporting trusses, defined as image 3 The two cable nets shown are cable-rod systems, and the rest of the grid structure, surrounding trusses and lower frames are supporting systems;

[0022] (2) Define the force density ...

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Abstract

The invention discloses a force density finite element mixing method used for rope-pole-beam mixed system form-finding. The method comprises the steps of (1) precisely defining a building structural model as combination of a flexible rope-pole system and a supporting system, (2) defining the force density of components of the flexible rope-pole system, (3) 'killing' the supporting system of the structural model, (4) carrying out the form-finding with the force density method to obtain the shape of the rope-pole system and internal force distribution which coincide with the mechanics principle, (5) 'activating' the supporting system of the structural model, and (6) carrying out linear finite element analysis to obtain the balanced internal force state of the supporting system at the original position of the model. The force density finite element mixing method used for the rope-pole-beam mixed system form-finding is applied to a mixed building structure comprising double-curved-surface cable nets, the ideal shape of a flexible cable net structure and the internal force distribution which coincide with the mechanical equilibrium condition are obtained, the internal force distribution of the supporting system under drawing geometry is also obtained, requirements of architects are met, and basic conditions are provided for follow-up structure analysis.

Description

technical field [0001] The mixing method involved in the invention, in particular, relates to a force density finite element mixing method for form-finding of a cable-strut-beam hybrid system. Background technique [0002] Shape determination analysis (form-finding) is an important link in the calculation and analysis of flexible or semi-rigid hybrid building structures with cable-rod systems, and it is the link between the working state of the structure and the stress-free blanking state. For rigid building structures, the geometry on the drawing is the geometry of the structure when it is built. For flexible building structures, the drawing geometry is the geometry expected by the architect, and the final geometric shape of the building structure is also closely related to its mechanical state. Therefore, form-finding is required to determine its shape and initial internal force state. For the hybrid building structure, architects require that the rigid peripheral support...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 张其林罗晓群王忠全吴杰杨宗林
Owner SHANGHAI TONGLEI CIVIL ENG TECH
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