In the Netherlands, concrete pavements varying from low volume country roads to dual carriage motorways, are designed with the ‘VENCON 1.0’ program. This program has been developed in the eighties and was originally meant for the design of jointed concrete pavements. An enquiry amongst the users revealed the need for an update towards the Windows operating system but also a technical update became necessary. The update also gave an opportunity to reconsider the design models, to incorporate CRCP design and ‘standardise’ input data such as the latest practical measurement data from axle loads and tyre spectra of vehicles as well as temperature gradients in the concrete pavement. The classical Westergaard formulae for thickness calculation of concrete layers were extended with Van Cauwelaert's closed form solutions to cater for bound base layers. The ‘Delft University tensile member model’ is used to design the reinforcement and to predict the cracking pattern of the continuously reinforced concrete pavement. This model is validated with in-situ measurements of two CRCP roads. The program distinguishes three user levels (junior, senior, expert). VENCON 2.0 was developed under CROW’s responsibility and came onto the market in early 2005. It is used to design both jointed plain concrete pavement (JPCP) and continuously reinforced concrete pavements (CRCP). This paper provides an outline of the calculation process and the main improvements to the program.
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