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 This document has been replaced by a standard (ST) in the DNV GL portfolio: DNVGL-ST-C All DNV GL service documents may be.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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When it comes to designing offshore concrete structures, important effects that need to be considered are, for example, the concrete fatigue performance under water, effects of water pressure in pores and cracks and principles for watertightness.

PES (UK) Ltd | DNV Certification for PAGEL Offshore Grout Material |

Updated concrete standard Historically, operators used the former Norwegian concrete standards for offshore structures. With a low lifecycle cost, concrete can reduce maintenance expenditure compared to steel solutions. 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.

Ndv, the main purpose of the dnb is not to evaluate the wind turbine fluid dynamic response, but to study the interaction between civil architecture and mechanical structure.

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

In particular, submerged concrete does not perform as well as above-water concrete under fatigue loading. Another interesting and unique feature of the updated DNV-OS-C is the systematics it provides for the qualification of new and innovative materials intended for offshore use. The area is well known for icebergs, which is why the operators have found concrete to be the most competitive solution. Later, in order to study the effects on vertical cables fixed to the sea bottom, a detailed analysis of the floating anchorage TLP Tension Leg Platform was carried out.


Concrete solutions are also being considered for projects north and east of Russia and north of Norway, amongst others.

No other standard currently available to the industry covers the whole lifecycle of a concrete offshore structure and provides detailed design guidance. Edited by Katie Woodward. This is now changing with the renewed interest in robust concrete structures for the Arctic environment and for liquefied natural gas LNG storage. On this basis, a floating wind turbine called ARYA, has been designed as case-study.

DNVGL-ST-C Offshore concrete structures – DNV GL

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. 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. In this way, an economical contribution to the sustainability of the wind farm is possible. The purpose of the Eurocodes is to provide a harmonised set of design and construction rules that are applicable throughout Europe.

They can also support heavy topsides and be designed to store oil.

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

Please sign in or become a member for free. However, the Eurocodes focus on onshore structures and this has to some extent resulted in important offshore experience being excluded. Fixed concrete structures can provide continuous production and fewer shutdowns as they can withstand harsher oss.

One of these materials is high-strength grout. 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 the most demanding operating environments. Read the article online at: This content is available to members only. Historically, env used the former Norwegian concrete standards for offshore 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. Despite the fact d502 a number of concrete platforms are still in operation, particularly in hostile marine environments worldwide, there has been little development activity since the s.

Here are the instructions how to enable JavaScript in your web browser. 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. A numerical model has been implemented and nonlinear env analysis have been performed, od both the wind-structure and the wave-structure interaction.

Unlike steel structures, concrete structures are built locally and therefore also promote the local economy. This changed in when Eurocodes were adopted throughout Europe, including in Norway.

Edited by Katie Woodward Read the article online at: 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. To address f502 current offshore concrete developments, DNV GL is now reviewing the Offshore Concrete Standard to provide updates and new guidance, particularly for harsh locations. For full functionality of this site it is necessary to enable JavaScript.