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Structural Engineering and Mechanics
  Volume 40, Number 6, December25 2011, pages 801-811
DOI: http://dx.doi.org/10.12989/sem.2011.40.6.801
 


A new experimental technique on the tubular joints of spatial grid structures
Zhi-Hua Chen, Guo-Jun Sun and Zhi-Shan Luo

 
Abstract
    A new experimental technique was developed on the plate-inserted welded tubular joints of spatial grid structures. In the experimental technique, a microcomputer controlling instrument of moire intervention (MCIMI) was adopted. A test was designed on the plate-inserted welded tubular joints of spatial grid structures to show the effectiveness of the MCIMI technique. Both traditional electrical measuring technique and MCIMI technique were employed in the test. The test results showed that the MCIMI technique was feasible in the case of the complicated tests on steel structures. The MCIMI technique not only implemented the limitation of traditional electrical measuring technique, but also improved the accuracy of the test. According to the test results, we further examined the plate-inserted welded tubular joints in the cable-stayed spatial grids of the Binhai International Convention & Exhibition in Tianjin, China. The analysis showed the joints are safely designed with adequate conservatism. The research provided a new application of MCIMI in the field of large-scale structure engineering.
 
Key Words
    moire intervention; MCMI; spatial grids structure; plate-inserted tubular joints; welded
 
Address
Zhi-Hua Chen, Guo-Jun Sun and Zhi-Shan Luo: School of Civil Engineering, Tianjin University, Tianjin 300072, China
 

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