Crack analysis, test, and quality control of repairing technique of damaged steel structure roof frame

2002 ◽  
Author(s):  
Shouping Gui ◽  
Qiu He ◽  
Peiyan Huang
Keyword(s):  
Quality Control ◽  
Steel Structure ◽  
Crack Analysis

Defect Identification and Quality Control of Steel Structure Installation Projects Based on Fishbone Diagram

2013 ◽  
Vol 340 ◽  
pp. 104-108
Author(s):  
Guang Feng Wang
Keyword(s):  
Quality Control ◽  
Steel Structure ◽  
Engineering Technology ◽  
Defect Identification ◽  
Quality Problem ◽  
Fishbone Diagram ◽  
Structure Engineering

With the increasing popularization of the application of steel structure in the construction field of China, quality problem has become a major challenge of steel structure. Therefore, how to better control the quality of steel structure has been a very important issue in China now. In this paper, combined with the characteristics of steel structure engineering technology, how to better control the quality of steel structure installation projects is discussed and analyzed in depth.

Application and Research of 3D Laser Scanning Technology in Steel Structure Installation and Deformation Monitoring

2014 ◽  
Vol 580-583 ◽  
pp. 2838-2841 ◽  
Author(s):  
Dong Ling Ma ◽  
Jian Cui ◽  
Shi Yan Wang
Keyword(s):  
Quality Control ◽  
Laser Scanning ◽  
Steel Structure ◽  
Deformation Monitoring ◽  
Structural Deformation ◽  
Laser Radar ◽  
Measurement Technology ◽  
Feature Points ◽  
Cloud Data ◽  
Large Span

The traditional steel structure deformation monitoring generally uses Total Station and GPS to do monitoring quality control, but there are some disadvantages of these methods. Laser radar technology is a new non-contact measurement technology emerged in recent years. It is ideal for installation and slip construction quality monitoring of large-span steel structure. This paper use laser radar technology to monitor large-span steel structure construction, use laser scanner to scan on steel every period of time and collect 3D point cloud data of the feature points after a period of time. Through the comparative analysis of the data and the chart which reflect the amount of deformation of the feature points, it can accurately obtain the result of structural deformation, oblique direction, and the deviation between the actual coordinates and the design coordinates, which provides the most accurate and direct information for the project. Laser radar technology solves the difficult issues such as workload outside the industry and difficulties in visibility of the traditional measurement methods, greatly improves accuracy and efficiency compared to traditional methods, and achieve a high-precision quality control over the construction.

scholarly journals MANIFESTAÇÕES PATOLÓGICAS E CONTROLE DE QUALIDADE NA MONTAGEM E FABRICAÇÃO DE ESTRUTURAS METÁLICAS

2016 ◽  
Vol 13 (1) ◽  
Author(s):  
Caio César Sacchi ◽  
Alex Sander Clemente de Souza
Keyword(s):  
Quality Control ◽  
Quality Assurance ◽  
Production Process ◽  
Structural Steel ◽  
Early Identification ◽  
Steel Structure ◽  
Steel Structures ◽  
Flow Chart ◽  
Efficient Planning ◽  
Technological Study

RESUMO: Este trabalho apresenta um estudo científico e tecnológico sobre o controle de qualidade na fabricação e montagem de estruturas metálicas, elaborado por meio da análise e interpretação de informações obtidas em levantamentos bibliográficos, visitas técnicas e entrevistas à empresas do setor, evidenciando o conhecimento da literatura existente. Sendo assim, serão abordadas as diversas etapas da fabricação e da montagem das estruturas metálicas, assim como ensaios utilizados para a garantia da qualidade na fabricação. A pesquisa tem como objetivos, definir critérios de inspeção durante a fabricação e a montagem das estruturas metálicas, para identificação prematura de manifestações patológicas, apresentar os principais sintomas patológicos encontradas em estruturas de aço, estabelecendo suas origens e causas, expor um fluxograma sobre o processo de produção de uma estrutura metálica, indicando os principais pontos de checagem de desempenho e, por fim, analisar algumas manifestações patológicas, indicando as falhas no processo de produção. Conclui-se que existem cuidados a serem observados para não cometer erros construtivos, facilmente evitáveis por meio de planejamento e fiscalização eficientes. O intuito do estudo é promover o intercâmbio dos resultados da pesquisa com o setor produtivo e colaborar na revisão e elaboração de normas. ABSTRACT: This paper is a scientific and technological study about quality control in the fabrication and assembly of steel structures, developed through the analysis and interpretation of information obtained from literature surveys, technical visits and interviews with companies in the sector, highlighting the knowledge the existing literature. Therefore, they will discuss the processes for obtaining structural steel and its properties, the various stages of fabrication and assembly of steel structures, as well as tests used for quality assurance in fabrication. The survey aims to define inspection criteria for the fabrication and assembly of steel structures for early identification of pathological manifestations, present the main pathological symptoms found in steel structures, establishing its origins and causes, exposing a flow chart of the process production of a steel structure showing the main performance checkpoints and, finally, to analyze certain pathological events, indicating failures in the production process. It is concluded that there are precautions to be observed not to make constructive errors, easily preventable through efficient planning and supervision. The study's aim is to promote the exchange of research results to the productive sector and assist in the review and development of standards.

Rosenhain Centenary Conference - 2. Design implications for materials selection 2.8 Weldability and toughness specifications for structural steels in Japan — with special reference to WES-155 and -156 Discussion

1976 ◽  
Vol 282 (1307) ◽  
pp. 263-275
Keyword(s):  
Quality Control ◽  
Welded Joint ◽  
Steel Structure ◽  
Structural Steels ◽  
Cooling Time ◽  
Materials Selection ◽  
Diffusible Hydrogen ◽  
Welding Condition ◽  
Factors Affecting ◽  
Welding Procedure

First of all, I should like to emphasize that WES 135 is just a material specification for quality control. So, as Burdekin (Keynote) pointed out, it does not contain any statements about the influences of real welding procedure. It goes without saying that, for application purposes, we should take account of many important factors affecting the behaviour of materials in a real structure. For example, in order to avoid weld cracking in real structures, we must have the critical cooling time determine rom weldment cracking parameter, P w , which is expressed as follows: jPcm + 60 + 40000’ where H is the concentration of diffusible hydrogen content under the welding condition used (cm 3 / 100 g) and K is the intensity of restraint of real welded joint in structure (kg-mm/mm) We compare the P w value thus obtained with the cooling time in the actual steel structure obtained from the welding procedure depending on heat input, preheating condition and p ate thickness etc. If the critical cooling time to avoid weld cracking obtained from P w is less than the cooling time obtained for real structures we do not expect weld cracking (K. Satoh, S. Natsu, et al 11W Doc. IX-834-73).

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