Trondheim, Norway
Trondheim, Norway

Reinertsen is a civil engineering, construction, and petroleum industry supply company based in Trondheim, Norway. It was established in 1946 and remains family-owned. Its CEO is Erik Reinertsen and chairman is Torkil R. Reinertsen. In 2011, Reinertsen had a revenue of €400 million and 2,100 employees. It has offices in Trondeim, Orkanger, Oslo, Bergen, Gothenburg, Stockholm, Murmansk and Szczecin . Wikipedia.

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Palmer A.,National University of Singapore | Bjerkas M.,Reinertsen AS
Proceedings of the International Conference on Port and Ocean Engineering under Arctic Conditions, POAC | Year: 2013

Previous research has shown that the force between ice and a structure is very far from uniformly distributed in space and highly variable in time. A detailed reexamination of field measurements on nine load panels on the Nörstromsgrund lighthouse in the northern Baltic displays the same non-uniformity. Before ice-induced vibration begins, the forces on individual panels are random and uncorrelated. The loads on individual panels then progressively synchronise in frequency and phase, and as they do so vibrations start and build up. A Kuramoto plot quantifies the synchronisation. This is an instance of the entrainment phenomenon well known in other areas of physics and biology. It can be simulated by a simple mechanical model. The results throw light on the conditions under which ice-induced vibrations start, and on when they will stop. They can be compared with other instances of non-uniform loading from ice, such as those made by Sodhi with tactile sensors.


Maheswaran J.,Reinertsen AS | Siriwardane S.C.,University of Stavanger
Fatigue and Fracture of Engineering Materials and Structures | Year: 2016

In fatigue analysis, the structural detail of tubular joint has taken great attention among engineers. The DNV/GL-RP-0005 is covering this topic quite well for simple and clear joint cases. For complex joint and geometry, where joint classification is not available and there is limitation on validity range of non-dimensional geometric parameters, the challenges become a fact among engineers. The classification of joint is an important factor to consider in fatigue analysis. These joint configurations are identified by the connectivity and the load distribution of tubular joints. To overcome these problems to some extent, this paper compares the fatigue life of tubular joints in offshore jacket according to the stress concentration factors (SCF) in DNV/GL-RP-0005 and finite element method employed in Abaqus/CAE. The paper presents the geometric details, material properties and load history of the considered jacket structure. It then describes the global structural analysis and identification of critical tubular joints for fatigue life estimation. Hence, fatigue life is determined based on the guidelines provided in design codes. Fatigue analysis of tubular joints is conducted using the finite element employed in Abaqus/CAE as the next major step. Finally, predicted SCFs and fatigue lives are compared, and these observations tend to conclude that even though the fatigue life, which is calculated based on code given SCFs, provides more realistic prediction to the simple uniplanar joints, there is a doubt for complex joints and geometry, where joint classification is not available. Also, the study emphasized that it is very important to preciously investigate SCFs by considering accurate geometry of complex tubular joints for a good judgement of fatigue life. © 2015 Wiley Publishing Ltd.


Maheswaran J.,Reinertsen AS | Siriwardane S.C.,University of Stavanger
IABSE Conference, Geneva 2015: Structural Engineering: Providing Solutions to Global Challenges - Report | Year: 2015

The stress concentration factors of tubular joints have taken great attention among engineers. The DNV/GL-RP-0005 is covering this topic quite well for simple and clear joint cases. For complex joint and geometry, where joint classification isn't available and limitation on validity range of non-dimensional geometric parameters, the challenges become a fact among engineers. The classification of joint is important for the fatigue analysis. These joint configurations are identified by the connectivity and the load distribution of tubular joints. To overcome these problems to some extent, this paper compares the SCFs which were obtained by parametric equations given in DNV/GL-RP-0005, finite element analysis and full scale experimental test results of four different types of tubular joints in offshore jackets. Finally, the validity and limitation of each method are discussed.


Bjerkas M.,Reinertsen AS | Albrektsen A.,Aker Solutions | Gurtner A.,Statoil
Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE | Year: 2010

A case study on the lighthouse Norströmsgrund in the Gulf of Bothnia has been performed. Design ice load for the lighthouse is compared to existing code recommendations. It was found that the lighthouse was designed for a load level 110 % higher than what is proposed by the recently issued ISO/DIS 19906 design code. By the fact that the structure has got damages by ice action, it is concluded that separate dynamic analyses should be performed instead of simply adding amplification factors to the static loads. The present work shows ones again that a sawtooth like time series gives lower responses in the structure than harmonic functions when both are applied at the fundamental frequency. Copyright © 2010 by ASME.


Bjerkas M.,Reinertsen AS | Lonoy C.,DNV GL | Gurtner A.,Statoil
International Journal of Offshore and Polar Engineering | Year: 2013

Norströmsgrund Lighthouse full-scale data from the 2002/03 winter show that ice-induced vibrations of a vertical-sided offshore structure are occurring more frequently from mid-March on, rather than earlier in the winter. Meteorological data are used to calculate the ice growth and it is found that the occurrence of ice-induced vibrations may correspond with the stop in ice growth. Direct measurements of ice temperature in the surrounding ice cover indicate that the temperature profile in the ice cover changes from a linear shape to a C-shape between 28 February and 10 March. The major observations of ice-induced vibrations were done from 10 March on. Then intense vibrations were detected after a time period with air temperatures in the range of 0°C to +10°C. Ice-induced vibrations were also corresponding with the occurrence of global ice drift observed from satellite images. © by The International Society of Offshore and Polar Engineers.


Eiksund G.,Norwegian University of Science and Technology | Lango H.,GeoPartner Marin AS | Hove F.,Reinertsen AS
International Journal of Offshore and Polar Engineering | Year: 2013

Offshore pipelines for transport of hot oil and gas are exposed to thermal expansion/contraction during startup of and shutdown of production. A method for controlling the feed-in of pipe to locations with lateral or upheaval buckling is to install berms of crushed rock providing axial locking. To improve the basis for an optimized design of the axial locking berms, a full-scale axial friction test program has been performed. This paper presents the test setup, rock materials, pipe properties and the results from the friction test. Recommendations are given for friction coefficients between crushed rock and uncoated steel pipes and pipes coated with concrete and poly propylene. © by The International Society of Offshore and Polar Engineers.


Reinertsen J.L.,Reinertsen AS | Reinertsen J.L.,Institute for Healthcare Improvement
Journal of the American College of Radiology | Year: 2012

If the United States is to address its overall economic challenges, the rate of growth of health care costs must be restrained. For the next decade, physicians should expect that the principal focus of health policy will be on cost reduction, with a particular emphasis on shifting the business model from one in which physicians and hospitals are rewarded for volume to a model in which they are accountable for value. To succeed in this new model, doctors will need to reduce overuse (driven primarily by overcapacity), eliminate the costs of preventable complications, and trim prices for many services. As radiologists (who are squarely in the center of these issues) face this future, they should take a leadership stance, help create effective accountable care systems, and set high aims for improvement. The alternatives - lapsing into victimhood, ceding design and leadership of accountable care to outside forces, and aiming for what is merely passable - are neither attractive nor professional. © 2012 American College of Radiology.


Bjornsson I.,Lund University | Thelandersson S.,Lund University | Carlsson F.,Reinertsen AS
Journal of Bridge Engineering | Year: 2016

The design and verification of built structures requires structural engineers to consider accidental loading situations. The accidental loading situation investigated in this paper is heavy-goods vehicle (HGV) collisions with roadside structures; focus is on the design of bridge-supporting structures. The impact loads were determined from Monte Carlo simulations of a probabilistic model in which highway traffic measurements and accident statistics in Sweden are input. These loads were calculated for structures adjacent to straight roads as well as roads with curvature, and include considerations of the directional load components. Comparisons were made between the simulation results and approaches given in design codes, with focus on the Eurocode. The simplified approaches provided in the code were inadequate in their treatment of these design situations. Alternative equations for calculating impact forces and energies are presented. These equations can be used for determining design values for impact forces or for conducting probability/risk-based assessments of bridge supports subjected to HGV impacts. In this way, a more consistent treatment of HGV impacts in the design of bridge structures is achieved. © 2015 American Society of Civil Engineers.


Reinertsen D.,Reinertsen AS
IPAC 2011 - 2nd International Particle Accelerator Conference | Year: 2011

New methods are transforming the way organizations develop complex systems which contain advanced technology. In the past, organizations used sequential development processes which required one stage to be entirely complete before the next one started. Now they are shifting to processes that handle work in small batches. These small batches accelerate valuable feedback and reduce the size of in-process queues. Smaller queues unlock simultaneous improvements in quality, efficiency, and cycle time. This new approach is sometimes called lean product development because of its similarity to the ideas of lean manufacturing. This paper will introduce readers to some of the key concepts underlying lean product development and explain their relevance to the design of systems like particle accelerators. Copyright © 2011 by IPAC'11/EPS-AG.


Trademark
Reinertsen AS | Date: 2011-08-02

Electronic educational publications, namely, downloadable study guide in the fields of healthcare trustee, board and management education.

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