Design of concrete test bunkers
conference paper
When TNO Prins Maurits Laboratory wanted to design new bunkers for explosion testing to replace its old facilities, it appeared that special design codes for such bunkers do not exist. They are often designed with normal concrete design codes like the CEB/FIP Model Code 1990.
When a reinforced concrete structure is repeatedly loaded, the first place where damage is expected is the concrete-reinforcement bond of the most highly loaded reinforcement bars. The damage will lead to debonding of the rebar, which produces widening of the microcracks. In the next shots, concrete particles may become lodged in the cracks and keep them open. This can lead to pretensioning of the rebar, higher interface stresses, more damage and more debonding. Eventually, the distributed crack pattern can deteriorate into a single concentrated crack. TNO-PML developed a design method and criteria to prevent this from happening, which are described in this paper.
When a reinforced concrete structure is repeatedly loaded, the first place where damage is expected is the concrete-reinforcement bond of the most highly loaded reinforcement bars. The damage will lead to debonding of the rebar, which produces widening of the microcracks. In the next shots, concrete particles may become lodged in the cracks and keep them open. This can lead to pretensioning of the rebar, higher interface stresses, more damage and more debonding. Eventually, the distributed crack pattern can deteriorate into a single concentrated crack. TNO-PML developed a design method and criteria to prevent this from happening, which are described in this paper.
TNO Identifier
183620
Source title
31st DoD Explosives Safety Seminar, San Antonio, TX, USA, August 2004
Collation
6 p.
Files
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