Method for measuring local geometric initial defects of steel member with box-shaped section

A technology of local geometry and measurement method, applied in the field of structural engineering steel structure, can solve the problems of unsuitable construction site measurement, unsuitable for on-site measurement, and low operability, etc. The method is simple and practical, easy to prepare, and reduces errors Effect

Inactive Publication Date: 2012-07-25
TSINGHUA UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

However, the existing methods suitable for the measurement of the overall geometric initial defects of components (drawing method, etc.) are not suitable for the on-site measurement of the local geometri

Method used

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  • Method for measuring local geometric initial defects of steel member with box-shaped section
  • Method for measuring local geometric initial defects of steel member with box-shaped section
  • Method for measuring local geometric initial defects of steel member with box-shaped section

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Embodiment Construction

[0048] The present invention will be further described below in conjunction with the embodiments and the accompanying drawings.

[0049] In this embodiment, steel rulers and feeler gauges are used to measure local geometric initial defects of box-section steel members, and a total of 4 members are measured. Among them, the height H of the four steel plates of the numbered B-1 component is 302.3mm, and the width W is 241.6mm, and the height H of the four steel plates of the numbered B-2 component is 502.6mm, and the width W is 433.9mm. The height H of the 4 steel plates of the member numbered B-3 is 603.0mm, and the width W is 522.3mm. The height H of the 4 steel plates of the member numbered B-4 is 802.4mm, and the width W is 682.3mm. Using a steel ruler with a specification of 1m and a feeler gauge with a specification of 0.1mm, the measurement steps are:

[0050] Step 1: Fix the box-section steel component to be tested, referred to as component 1, vertically on the ground, ...

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Abstract

The invention belongs to the technical field of steel structures in structural engineering and particularly relates to a method for measuring local geometric initial defects of a steel member with a box-shaped section. The method comprises the following steps: respectively measuring vertical distances c1 and c2 from midpoints of two opposite edges on the outer surface of each of four steel plates of the measured steel member with a box-shaped section to a plane formed by four vertexes of the outer surface of the steel plate; measuring the vertical distance c3 from the center of the outer surface of each of four steel plates to the plane formed by the four vertexes of the outer surface of the steel plate; respectively calculating the local geometric initial defect values delta 1, delta 2, delta 3 and delta 4 of the outer surfaces of the four steel plates; and in comparison with the technical standards of the steel member with a box-shaped section, judging the quality of the steel member with a box-shaped section. According to the method, a steel rule and a feeler gauge which are common measurement tools are used for measuring the local geometric initial defects of the steel member with a box-shaped section; and the method has no special requirements on the site and auxiliary fixing devices for the steel member and is applicable to the measurement of local geometric initial defects of the steel member with a box-shaped section and the experimental study on stability performance of the steel member.

Description

technical field [0001] The invention belongs to the technical field of structural engineering steel structures, and in particular relates to a method for measuring local geometric initial defects of box-shaped steel components. Background technique [0002] The construction quality acceptance specification of structural engineering has specific requirements for the local flatness of the steel plate delivered from the factory, but there is no specific requirement for the flatness of the steel plate of the structural members (such as columns and beams) welded by the steel plate. Therefore, for box-section components There is no standard value for the value of the geometric initial defect of the steel plate. However, in the field of steel structure research, the study of stability issues is one of the most important topics, and the local geometric initial defects are just the most important factors affecting the local stability performance of components, so in the relevant expe...

Claims

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Application Information

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IPC IPC(8): G01B5/28G01B5/00
Inventor 施刚林错错石永久王元清
Owner TSINGHUA UNIV
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