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A Stability Detection Method of Adjustable Independent Steel Support

A detection method and steel support technology, applied in the testing of mechanical components, the testing of machine/structural components, measuring devices, etc., can solve the problems of difficulty in finding, difficult to apply, and cumbersome for stability detection methods.

Active Publication Date: 2016-11-30
北京万兴建筑集团有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are relatively mature detection methods for the stability of single-span non-variable steel supports, but it is difficult to find a stability detection method for this adjustable single-stage variable stiffness axial compression member, or it is extremely cumbersome , it is difficult to apply in practice

Method used

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  • A Stability Detection Method of Adjustable Independent Steel Support
  • A Stability Detection Method of Adjustable Independent Steel Support
  • A Stability Detection Method of Adjustable Independent Steel Support

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as Picture 1-1 , Figure 1-2 , Figure 1-3 , diagram 2-1 , Figure 2-2 As shown, a stability detection method of a single-stage variable stiffness axial compression rod with adjustable two-end hinges includes the following steps: taking an adjustable single-stage variable stiffness axial compression rod, the upper , The lower tube is connected by a pin; the outer diameter D of the upper tube of the steel support is measured S , tube wall thickness t S , variable height H S , Upper tube hole spacing@, hole diameter d; Lower tube outer diameter D X , tube wall thickness t X , constant height H X , the range value of height H is 1.71~3.0m;

[0044] Measure the cross-section characteristic value of the upper pipe and lower pipe hair cross-section: the cross-sectional area of ​​the upper pipe A S , moment of inertia I S , section die W S , radius of gyration i S ;Cross-sectional area of ​​lower tube A X , moment of inertia I X , Section modulus W X , ra...

Embodiment 2

[0075] Such as Picture 1-1 , Figure 1-2 , Figure 1-3 , Figure 3-1 , Figure 3-2 As shown, a method for detecting the stability of a single-stage variable stiffness axial compression rod with a fixed lower end and a freely adjustable upper end includes the following steps: taking an adjustable single-stage variable stiffness axial compression rod, the upper , The lower tube is connected by a pin; the outer diameter D of the upper tube of the steel support is measured S , tube wall thickness t S , variable height H S , Upper tube hole spacing@, hole diameter d; Lower tube outer diameter D X , tube wall thickness t X , constant height H X , the range value of height H is 1.71~3.0m;

[0076] Measure the cross-section characteristic value of the upper pipe and lower pipe hair cross-section: the cross-sectional area of ​​the upper pipe A S , moment of inertia I S , section die W S , radius of gyration i S ;Cross-sectional area of ​​lower tube A X , moment of inertia...

Embodiment 2 or 3

[0104] Embodiment 2 or 3 Practical application of a stability detection method for adjustable independent steel supports: DLZ-1, DLZ-2, DLZ-3 three specifications of adjustable independent steel supports produced by Beijing Aoyu Formwork Group in 2007 All the steel supports can be tested for stability in the embodiment, and the stability test for DLZ-1 is now carried out specifically.

[0105] Figure 4 As shown, measure the outer diameter of the upper pipe D s =48mm, pipe wall thickness t s = 3.0mm, height H S It is 1.07m (variable), the opening distance of the upper tube @=150mm, and the hole diameter d=17mm. Down tube outer diameter D x =60mm, tube wall thickness t x = 3.0mm, height H x is unchanged at 1.448m. Available height H = 1.71 ~ 3.0m. The upper and lower pipes are connected with φ=16mm pins. The section characteristics of the upper tube φ48×3 and the lower tube φ60×3: the section parameters of the upper tube: the cross-sectional area A s =424mm 2 , momen...

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Abstract

The invention discloses a method for detecting the stability of an adjustable independent steel support. Through the following formula calculated by the computer, the stability of the two situations is tested: 1. The stability equation of the single-order variable stiffness axial compression rod with adjustable hinges at both ends: 2. The stability equation of a single-order variable stiffness axial compression member with a fixed lower end and a freely adjustable upper end: . The method of the invention fills the gap in the calculation of the stability of the single-stage variable stiffness axial compression member, can be used for material selection and construction in actual engineering, is simple, reliable, and has remarkable, universal and practical application value.

Description

technical field [0001] The invention relates to a stability detection method of a steel support, in particular to a stability detection method of an adjustable independent steel support. Background technique [0002] Due to its advantages of high strength, light weight and good mechanical properties, steel structures have been widely used in the field of construction. [0003] In October 2010, the Ministry of Housing and Urban-Rural Development issued the "Notice on the Promotion and Application of 10 New Technologies (2010) in the Construction Industry". Item 4 of the "10 New Technologies" is new formwork and scaffolding technology, of which Section 4.5 is the construction technology of early demolition formwork. Connecting brackets, pin brackets, door brackets, etc." Obviously free-standing steel supports are superior to other supports and should be preferred. Advanced free-standing steel support structures such as Picture 1-1 , Figure 1-2 , Figure 1-3 As shown, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/00
Inventor 李建民陈红王连明陈辉兰春辉张艳霞党策王晨健陈琦王晓光施炳华杨晓毅
Owner 北京万兴建筑集团有限公司
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