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Document replaced. This document has been replaced by a standard (ST) in the DNV GL portfolio: DNVGL-ST-C All DNV GL service documents may be. Download DNV GL’s standard for Offshore concrete structures. Find the most up-to-date version of DNV-OS-C at Engineering

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This paper aims to show a refurbishment project of an off-shore wind turbine, combining its natural purpose of exploiting the wind resources in the windiest sea areas along the coasts of Djv Sardinia, Sicily, Abruzzo, Apulia together with the possibility of using its structure as a tourist accommodation.

Fixed concrete structures can provide continuous production and fewer shutdowns as they can withstand harsher weather. Edited oos Katie Woodward Read the article online at: Concrete solutions are also being considered for projects north and east of Russia and north of Norway, amongst others. The approach defined in C ensures quality by considering all the aspects, from production to application, which are critical to the dmv in-place material offshore. Another interesting and unique feature of the updated DNV-OS-C is ndv systematics it provides for the qualification of new and innovative materials intended for offshore use.

This is believed to be due to the concrete degradation caused by cyclic varying pore water pressure and the pumping effect of water ingressing and exiting opening and closing cracks.

DNV GL on offshore concrete structures | Energy Global

No other standard currently available to the industry covers the whole lifecycle of a concrete offshore structure and provides detailed design guidance. Rnv steel structures, concrete structures are built locally and therefore also promote the local economy. A review of the offshore grouting procedure and quality control documentation is undertaken and forms the basis for the full-scale mock-up test performed to replicate the intended offshore application.


Updated concrete standard Historically, operators used the former Norwegian concrete standards for offshore structures.

DNV-OS-C502 – Detailed Design of Offshore Concrete Structures – Draft

On this basis, a floating wind turbine called ARYA, has been designed as case-study. In particular, dnnv concrete does not perform as well as above-water concrete under fatigue loading.

They can also c5502 heavy topsides and be designed to store oil. However, the Eurocodes focus on onshore structures and this has to some extent resulted in 5c02 offshore experience being excluded. When it comes to designing offshore concrete structures, important effects that need cnv be considered are, for example, the concrete fatigue performance under water, effects of water pressure in pores and cracks and principles for watertightness.

Read the article online at: The standard has been developed on the basis of the experience DNV GL has gained over the years through its involvement in many offshore grouting projects.

Concrete advantages In the polar extremes, concrete structures are durable and robust to resist collisions with icebergs and are resistant to abrasion from floating ice.

Here are the instructions how to enable JavaScript in your web browser. Therefore, the main purpose of the paper is not to evaluate the wind turbine fluid dynamic response, but to study the interaction between civil architecture and mechanical structure. A numerical model has been implemented dnvv nonlinear dynamic analysis have been performed, investigating both the wind-structure and the wave-structure interaction.

In this way, an economical contribution to the sustainability of the wind farm is possible. This content is available to members only. Please sign in or become a member for free. Home Downstream Special reports 27 October Creating a complete code for offshore concrete structures. In the early days of the industry when concrete platforms and installations started to be used, DNV GL experts verified such structures in Norway.


With a low lifecycle vnv, concrete can reduce maintenance expenditure compared to steel solutions. Concrete technology has quite literally been the backbone of the oil and gas industry for nearly 40 years, with concrete offshore structures enabling production in ddnv most demanding operating environments.

DNV MPQA Certification for PAGEL Offshore Grout Material

Laboratory tests conducted by the x502 producer at an independent laboratory and witnessed by DNV GL are used to determine the fresh and hardened grout properties. The analysis was based on the extreme environmental conditions of the site where it has been suggested to install the system. In addition, an audit of the manufacturing facility is undertaken with a focus on the quality control procedures in place for the product.

Ultimately, the review of DNV OS C aims to create a unified consistent standard, covering the full lifecycle of an offshore concrete structure, that can be adopted by the industry.

DNV GL believes that this type of certification scheme will facilitate the adoption of these materials by operators.

TLP consists of a nearly fully submerged cylindrical platform, which supports a o MW wind rnv and is linked to the sea bottom by 3 ties which assure stability and limited tilting, even under the worst loads induced by wind and sea. In the polar extremes, concrete structures are durable and robust to resist collisions with icebergs and are resistant to abrasion from floating ice.

For full functionality ox this site it is necessary to enable JavaScript. The area is well known for icebergs, which is why the operators have found concrete to be the most competitive solution.