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Waarts, P.H. (author), Vrouwenvelder, A.C.W.M. (author), TNO Bouw en Ondergrond (author)
conference paper 2005
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de Wit, M.S. (author), Waarts, P.H. (author), Hölscher, P. (author), Stuit, H.G. (author), TNO Bouw (author)
The reliability of vibration predictions distinguishes itself from other reliability problems be-cause of the highly non-linear behavior of the underlying models. Over the last two years, a combination of four institutes in the Netherlands has studied the reliability in this type of predictions. For the sake of compar-ison, besides sophisticated...
conference paper 2003
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de Boer, A. (author), Waarts, P.H. (author), TNO Bouw (author)
There are no design rules for cofferdam structures. Research has been carried out to close this gap by developing a design procedure for cofferdam structures in a semi-probabilistic way, close to sheet pile guidelines. During the past few years a complete probabilistic analysis tool has become available as part of an existing FE code. With this...
conference paper 2003
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Lassing, B.L. (author), Vrouwenvelder, A.C.W.M. (author), Waarts, P.H. (author), TNO Bouw (author)
In recent years an advanced program for reliability analysis of dike systems has been under de-velopment in the Netherlands. This paper describes the global data requirements for application and the set-up of the models in the Netherlands. The analysis generates an estimate of the probability of system failure and an indication of the...
conference paper 2003
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Suddle, S.I. (author), Waarts, P.H. (author), TNO Bouw (author)
Safety is nowadays one of the main items on the agenda during the planning, realisation and management of most large-scale projects, particularly in infrastructure and building projects in intensively used areas such as multiple use of land projects. It is vital that safety aspects are properly assessed at an early possible stage of the project....
conference paper 2003
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Suddle, S.I. (author), Ale, B.J.M. (author), Waarts, P.H. (author), Weerheijm, J. (author), TNO Bouw (author)
Buildings above roads and railways are examples of multiple use of space. Safety is one of the critical issues for such projects. This paper will propose effects of safety measures for multiple use of space projects for critical scenarios i.e. fires, explosions, release of toxic substances and mechanical accidents.
conference paper 2003
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Waarts, P.H. (author), TNO Bouw (author)
Monte Carlo Analysis is often regarded as the most simple and accurate reliability method. Be-sides it is the most transparent method. The only problem is the accuracy in correlation with the efficiency. Monte Carlo gets less efficient or less accurate when very low probabilities are to be computed in combina-tion with limit state functions that...
conference paper 2003
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Drijkoningen, G.G. (author), Esposito, G. (author), Waarts, P.H. (author), Stephenson, R.A. (author), TNO Bouw (author)
In September 2001, a noise test for imaging the lithospheric crust below the Netherlands was carried out. In the late 1980’s, TNO shot a 2-D seismic profile through the Netherlands with the aim to image down to the lower crust, but their main target (acquisition parameters) was the upper sedimentary basin, and not the granitic crust down to the...
conference paper 2003
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Waarts, P.H. (author), Vrouwenvelder, A.C.W.M. (author), TNO Bouw (author)
Most reliability methods are applicable only for relatively simple structural systems with analytically formulated limit state functions and a few random variables. The combination of these standard reliability methods with structural analysis based on physically and geometrically non-linear Finite Element calculations leads to large computation...
conference paper 2002
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Waarts, P.H. (author), Vrouwenvelder, A.C.W.M. (author)
In this paper an adaptive procedure is presented DARS: Directional Sampling, combined with an interactive response surface. This method makes structural reliability computations feasible without pre-knowledge the probabilistic behaviour even for cases with many stochastic variables and a low probability of failure.
conference paper 2000
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de Boer, A. (author), Waarts, P.H. (author), TNO Bouw (author)
Within the use of alternative methods of probabilistic analysis and coming up computers with more CPU-power, today it Is possible within a design office, to analyse structures in a probabilistic way. After a pilot Implementation of some alternative methods in an existing FE-code, some structures are analysed in this way. DependIng on the FE code...
conference paper 1999
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de Boer, A. (author), Waarts, P.H. (author), TNO Bouw (author)
This paper describes the design of a new cable stayed composite bridge near Kampen in the Netherlands. In the design process, the safety of bridges is insured by means of partial safety factors for both strength and load parameters. As a result it is generally accepted that the structure as a whole matches the desired probability of failure. In...
conference paper 1999
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Waarts, P.H. (author), Vrouwenvelder, A.C.W.M. (author), TNO Bouw (author)
In cooperation with TNO, Delft University of Technology has written a computer code to calculate the failure probability of structures. Probabilistic methods have been implemented in the existing TNO Finite Element code DIANA which includes physically and geometrically non-linear behaviour of the structure. In the probabilistic Finite element...
conference paper 1998
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Pelgröm, L.J.W. (author), Waarts, P.H. (author), Wennink, P.M. (author), TNO Bouw (author)
Onvlakheid van een wegoppervlak kan worden uitgedrukt als een responsparameter van een voertuig op het langsprofiel. Deze zogenaamde International Roughness Index (IRI) kan aan de hand van ARAN-vlakheidsmetingen worden berekend.
conference paper 1998
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Waarts, P.H. (author), Courage, W.M.G. (author), TNO Bouw (author)
conference paper 1996
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Waarts, P.H. (author), Vrouwenvelder, A.C.W.M. (author)
In structural steel design the ultimate design limit is governed by full cross-sectional plasticity, where an elastic-perfectly plastic material behaviour is used. Hardening of the material is not used. Some loads are not considered such as settlements of supports and temperature loads in static indeterminate structures. The Stochastic Finite...
conference paper 1996
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