Method and system for calculating extrusion stress of isotropic double-pipe concrete column

A technology of extrusion stress and concrete columns, applied in the direction of columns, pillars, pier columns, etc., can solve the problems of difficult research, measurement, and inability to pass direct tests, etc., and achieve a wide range of applications

Active Publication Date: 2021-06-11
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The compressive stresses between the inner core concrete and the inner pipe, and the outer c

Method used

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  • Method and system for calculating extrusion stress of isotropic double-pipe concrete column
  • Method and system for calculating extrusion stress of isotropic double-pipe concrete column
  • Method and system for calculating extrusion stress of isotropic double-pipe concrete column

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] In order to study the axial compression performance of the dual steel pipe concrete column, the typical load - displacement curve of the dual steel pipe concrete column (eg figure 1 The shown is divided into three phases: the elastic phase (OA), the elastoplastic phase (AB), and the decline (BC). In the elastic phase (OA): At this stage, the load increases as the displacement increases. Regarding the location of a point, it is generally 0.70 to 0.85 times limit load. In the elastoplastic phase (ab): The load is no longer increased as the displacement increases. The slope of the load-displacement curve gradually decreases until a peak load is reached. In the decreased segment (BC), with the increase in displacement, the load is lowered. It is worth noting that as the curved coefficient increases, the decline may become gentle, and even the continuation of the load.

[0089] In the actual engineering, the components are generally in a state of elastic pressure. Analysis of th...

Embodiment 2

[0234] In this embodiment, it provides the method of extrusion stress calculation system described above, and the method described in can be achieved.

[0235] In this example, the isotropic dual-tube concrete column extrusion stress computing system includes parameter acquisition module, internal core concrete force deformation analysis module, internal tube force deformation analysis module, external interlayer concrete deformation analysis module, external The stress deformation analysis module, the extrusion stress analysis module, the calculation module, the image forming module, the input display module, and the control module.

[0236] The parameter acquisition module is used to obtain the calculation parameters of the dual-tube concrete column, and the calculation parameters include: Poisson ratio, elastic modulus, internal pipe and external pipe of internal core concrete and exterior pipes, and Poisson, elastic modulus, Inner diameter, wall thickness, etc.

[0237] The i...

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Abstract

The invention provides a method and system for calculating extrusion stress of an isotropic double-pipe concrete column, and the method comprises the steps: 1, obtaining calculation parameters of a double-pipe concrete column, including the Poisson's ratio and elastic modulus of internal core concrete and external interlayer concrete, and the Poisson's ratio, elastic modulus, inner diameter and wall thickness of an internal pipe and an external pipe; 2, establishing an extrusion stress relationship among all parts of the double-pipe concrete column; 3, substituting calculation parameters into the step 2 to obtain the extrusion stress between the parts; 4, based on the calculation parameters and the result obtained through solving in the step 3, obtaining the annular and radial strain of the inner core concrete, the annular stress and the annular strain of the inner pipe, the radial and annular stress of the outer interlayer concrete changing along the thickness and the radial and annular strain of the outer interlayer concrete changing along the thickness, the circumferential strain of the inner side and the outer side of the outer interlayer concrete and the circumferential stress and the circumferential strain of the outer pipe.

Description

Technical field [0001] The present invention belongs to the field of civil engineering, and specifically, the present invention relates to a method and system for extrusion stress in the elastic pressure stages of homogeneous dual-tube concrete column. [0002] technical background [0003] Compared to ordinary single tube concrete, the dual-tube concrete column has more excellent fire resistance. Double tube concrete can also avoid the use of thick wall tubes, while the supply and processing of thick-wall tubes are difficult than ordinary tubes. The cross-sectional form of the double tube also helps to avoid the adverse effects of concrete dry shrinkage on structural dependent performance. For example, "CecS28: 2012) (CECS28: 2012) stipulates that when the steel pipe diameter is greater than 2000mm, a cross-sectional form of concentric bilateral or multilayer should be taken to avoid the effect of concrete dry shrinkage. The cross-sectional form of the double-steel pipe concrete ...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06F30/13E04C3/34E04C3/32
CPCE04C3/34E04C3/32
Inventor 卢亦焱李伟捷李杉梁鸿骏黄悦
Owner WUHAN UNIV
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