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Siemes, A.J.M. (author), Vrouwenvelder, A.C.W.M. (author), TNO Bouw (author)
After the introduction of reinforced concrete it was believed that the material was extremely durable. Soon it was found however, that reinforced concrete could have serious durability problems and that special care should be taken to avoid them. Durability became an issue.
conference paper 2002
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de Vries, H. (author), Siemes, A.J.M. (author), TNO Bouw (author)
Design for durability is gradually changing from a deem-to-satisfy approach to a performance based approach. The conventional building codes give in principle only construction rules. If these rules are fulfilled, it is assumed that the structure will have an adequate durability. But specifications concerning dura-bility in codes are still on an...
conference paper 2002
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Siemes, A.J.M. (author), TNO Bouw (author)
After the introduction of reinforced concrete it was believed that the material was extremely durable. Soon it was found that reinforced concrete could have serious durability problems and that special care should be taken to avoid them. Durability became a design issue.
conference paper 2002
document
Siemes, A.J.M. (author), TNO Bouw (author)
Bij het ontwerpen van gewapend betonnen boortunnels wordt in Nederland sinds kort een nieuwe methode toegepast om te zorgen dat de tunnels voldoende duurzaam zijn. Het was gebruikelijk om voor betonconstructies een aantal uitvoeringseisen te stellen, bijvoorbeeld ten aanzien van de grootte van de betondekking, de water-cementfactor en de...
conference paper 2002
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Siemes, A.J.M. (author), TNO Bouw (author)
The service life of a building or structure is determined by the design and construction in combination with the ageing and the maintenance during use. To get grip on this combination it has advantage to present the functioning of the building or the structure on a performance level. As ageing will influence the performance, the combined effect...
conference paper 2002
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Siemes, A.J.M. (author), TNO Bouw (author)
In de huidige generatie van betonvoorschriften wordt de duurzaamheid van betonconstructies geregeld door enerzijds eisen te stellen aan de samenstelling van de bestanddelen van beton, zoals cement, zand, grind en water. Anderzijds worden uitvoeringseisen gesteld, zoals een minimum betondekking, een maximum water/cementfactor. Duurzaamheid is...
conference paper 2001
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Siemes, A.J.M. (author), Raupach, M. (author), TNO Bouw (author)
conference paper 2001
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Siemes, A.J.M. (author), TNO Bouw (author)
In the past years much efforts have been spent on a new design approach for the durability of existing and new concrete structures. The results of these efforts can be seen in recent work of several international scientific committees of Rilem, CEB, CIB and FIER These have finally resulted in the Brite/Euram project DuraCrete where a design...
conference paper 2001
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Siemes, A.J.M. (author), TNO Bouw (author)
conference paper 2001
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Siemes, A.J.M. (author), Bakker, J.D. (author)
More than forty years ago in 1957, the first publication was published in The Netherlands indicating the possibility of damage due to ASR in a concrete structure. About ten years ago however the first concrete structure in the Netherlands with alkali-silica reaction (ASR) was documented. During the years before it was generally believed that...
conference paper 2000
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Siemes, A.J.M. (author), Visser, J.H.M. (author)
During an extensive investigation of some 25 concrete bridges and other structures suffer-ing from alkali-silica reaction it has been found that the uniaxial tensile strength of the concrete was extremely low in relation to both the compressive strength and the splitting tensile strength. It is known that concrete with damage due to ASR has...
conference paper 2000
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Siemes, A.J.M. (author), Gulikers, J.J.W. (author)
Recent inspections of 20 bridges in a highway in The Netherlands revealed that ASR had affected the concrete. Until then alkali-silica reaction (ASR) was a rather rare phenomenon. In view of the expected, future importance of the maintenance of Dutch infrastructure, it was decided to start a long-term monitoring program on the decks of two of...
conference paper 2000
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Siemes, A.J.M. (author), TNO Bouw (author)
conference paper 1999
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Siemes, A.J.M. (author), TNO Bouw (author)
conference paper 1999
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Siemes, A.J.M. (author), TNO Bouw (author)
Nowadays it is commonly accepted that the safety of structures should be expressed in terms of reli-ability. This means as the probability of failure. In literature [1, 2, 3, and 4] the bases have been given for the calculation of the failure probability. Making probabilistic calculations can be done on different levels, ranging from...
conference paper 1999
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Breitenb├╝cher, R. (author), Gehlen, C. (author), Schiessl, P. (author), van den Hoonaard, J. (author), Siemes, A.J.M. (author), TNO Bouw (author)
for large infrastructures are becoming more and more important. Service life requirements of 100 year or even more are usual. For the bored reinforced concrete tunnel under the Western Scheldt in the Netherlands the requirement was a service life of at least 100 years. No method had been specified to prove this service life. Since the concrete...
conference paper 1999
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Siemes, A.J.M. (author), Edvardsen, C. (author), TNO Bouw (author)
In the past decades much effort has been put into the improvement of the durability of concrete structures. This has resulted in a reasonable understanding of the main degradation processes or in experience with measures to prevent degradation. The results of this effort can be found in the present concrete codes and in manuals on durability...
conference paper 1999
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Engelund, S. (author), Vrouwenvelder, A.C.W.M. (author), Siemes, A.J.M. (author), TNO Bouw (author)
conference paper 1999
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Siemes, A.J.M. (author), TNO Bouw (author)
Everybody has some notion what is meant by the term probability. Answers like 'probably yes' or 'probably no' are part of the daily language. The word 'probably' indicates that we are not completely certain about the present status or future development of the item under discussion: two or more options are still open and in the best case we have...
conference paper 1999
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Siemes, A.J.M. (author), TNO Bouw (author)
After the introduction of reinforced concrete it was believed that the material was extremely durable. Soon it was found that reinforced concrete could have serious durability problems and that special care should be taken to avoid them. Durability became a design issue. Based on experience from practice and research construction rule have been...
conference paper 1999
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