On the blast resistance of high performance tunnel segments

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• 作者：Matteo Colombo ; Paolo Martinelli ; Marco di Prisco
• 关键词：Internal tunnel explosion ; Protection panel ; Multi ; layer tunnel structure ; Fibre reinforced concrete ; Shock tube test
• 刊名：Materials and Structures
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：49
• 期：1-2
• 页码：117-131
• 全文大小：1,257 KB
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• 作者单位：Matteo Colombo (1)
  Paolo Martinelli (1)
  Marco di Prisco (1)
  
  1. Department of Civil and Environmental Engineering, Politecnico di Milano, P.za L. da Vinci 32, 20133, Milan, Italy
  
• 刊物类别：Engineering
• 刊物主题：Structural Mechanics
  Theoretical and Applied Mechanics
  Mechanical Engineering
  Operating Procedures and Materials Treatment
  Civil Engineering
  Building Materials
  
• 出版者：Springer Netherlands
• ISSN：1871-6873

文摘

This paper presents the main findings of an experimental study that focuses on the response of fibre reinforced concrete used in underground tunnel linings in case of internal explosion. Two situations are explored: (a) the effectiveness of thin high performance fibre reinforced cementitious composite (HPFRCC) plates applied to the intrados of new or existing tunnels as a protection panel and (b) the behaviour of a layered tunnel segment solution made of steel fibre reinforced concrete and HPFRCC when a void is present in the mortar filling layer injected between the lining and the excavated surface, thus amplifying the in–service internal actions (bending moment and shear force). Shock tube experiments are carried out to investigate the two situations. These conditions are experimentally achieved by means of a proper arrangement of an existing shock tube designed for soil–structure interaction at Politecnico di Milano. A small portion of a tunnel segment is investigated by using circular layered specimens subjected to two different levels of reflected pressure. Simplified models are proposed for assessing the overall response of the two situations explored under blast loading.