Journal of South China University of Technology (Natural Science Edition) ›› 2016, Vol. 44 ›› Issue (10): 43-48,56.doi: 10.3969/j.issn.1000-565X.2016.10.007

• Mechanics • Previous Articles     Next Articles

Gravity-Based Impact Comparability Rule of Single-Layer Reticulated Shells and Its Numerical Verification

JIANG Zheng-rong1,2 ZHONG Yu-kai1 SHI Kai-rong1,2 LUO Bin3   

  1. 1.School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,Guangdong,China; 2.State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510640,Guangdong,China; 3.School of Civil Engineering,Southeast University,Nanjing 211189,Jiangsu,China
  • Received:2015-10-08 Revised:2016-05-12 Online:2016-10-25 Published:2016-09-01
  • Contact: 石开荣(1978-)，男，博士，副教授，主要从事预应力钢结构研究． E-mail:krshi@scut.edu.cn
  • About author:姜正荣(1971-)，男，博士，副教授，主要从事大跨度空间结构研究． E-mail:zhrjiang@ scut． edu． cn
  • Supported by:
    Supported by the National Key Technology Research and Development Program of the Ministry of Science and Technology of China during the“12th Five-Year Plan”(2012BAJ03B06)

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Abstract:

Through the dimensional analysis,a comparability rule expression of single-layer reticulated shells sub- jected to a vertex impact is derived in this paper,which considers the gravity and the strain-rate effect of relevant materials.On this basis,two methods of preparing material specially and adding extra mass are proposed to meet the scaling requirements.Then,a model according well with available literaturesis constructed by using the non- linear finite element software LS-DYNA,and it is proved to be reliable by comparing the experimental results with- the simulation ones.Finally,two analytical models of Kiewitt-Lamella single-layer reticulated shells are respec- tively constructed to verify the proposed two methods by comparing their node displacements.The results show that the proposed two methods can both accurately predict the displacement of the prototype,with the relative error ab- solutes of less than 15% and 12% respectively,and they can both accurately predict the collapse modes of the pro- totype,especially the whole collapse,and that the method of adding extra mass is better in terms of precision and maneuverability.

Key words: comparability rule, strain-rate effect, gravity, single-layer reticulated shell