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Copenhagen, Denmark

Ramboll Group A/S is a consulting engineering group with worldwide operations. Wikipedia.

An adequate representation of the site-specific wind-wave joint distribution is essential for cost-efficient and reliable designs of offshore wind turbines. Therefore, the wind and wave climates are subjected to a correlation of wind and wave parameters for design purposes. These correlations are often based on a lumping of the directional wave climate and subsequent association of the lumped wave climate to the directional wind climate. Preservation of the hydrodynamic fatigue distribution from the full wave climate is an important aspect in the wind-wave correlation process which requires an adequate consideration of the dynamics from the offshore wind turbine. However, only a few wind-wave correlation methods exist for the fatigue design of offshore wind turbines and none of them take the dynamics of the full structure adequately into account. In this study a new wind-wave correlation method has been developed and introduced. The new method is based on the establishment of damage contour lines which are used to determine the sea-state parameters that ensure simultaneous compliance with damage equivalency criterions at different locations within the offshore wind turbine. This simultaneous damage equivalency throughout the structure together with the straightforward derivation of the corresponding damage equivalent sea-state parameters constitutes the novelty of the presented wind-wave correlation method. © 2015 Elsevier Ltd. Source

Panigrahi J.K.,Berhampur University | Amirapu S.,Ramboll
Environmental Impact Assessment Review | Year: 2012

Environmental impact assessment (EIA) was first introduced in India based on the Environmental Protection Act (EPA), 1986. But formally it came in to effect, when Ministry of Environment and Forest (MoEF) has passed a major legislative measure under EPA in January 1994 for Environmental Clearance (EC) known as EIA Notification, 1994. Subsequently, EIA processes have been strengthened by MoEF by a series of amendments. The current practice is adhering to EIA Notification, 2006 and its amendments. The pieces of evidence collected and analysis in the present assessment suggest that, despite a sound legislative, administrative and procedural set-up EIA has not yet evolved satisfactorily in India. An appraisal of the EIA system against systematic evaluation criteria, based on discussions with various stakeholders, EIA expert committee members, approval authorities, project proponents, NGOs and consulting professionals, reveals various drawbacks of the EIA system. These mainly include; inadequate capacity of EIA approval authorities, deficiencies in screening and scoping, poor quality EIA reports, inadequate public participation and weak monitoring. Overall, EIA is used presently as a project justification tool rather than as a project planning tool to contribute to achieving sustainable development. While shortcomings are challenging, Government of India is showing a high degree of commitment. The EIA system in the country is undergoing progressive refinements by steadily removing the constraints. The paper identifies opportunities for taking advantage of the current circumstances for strengthening the EIA process. © 2012 Elsevier Inc. Source

Conservation Compendium aims to improve the way engineers handle historic fabric through the study of historic materials, conservation philosophy, form of construction and project examples. All original fabric should be kept in place where humanly possible decayed or not and new load bearing elements introduced around the existing to relieve load and make them redundant. The simple solution would be to just repair the beam end, trimming and splicing. It is vital that floors of a listed building are not subject to the over-specification of load. Liveliness can be combatted by the enhancement of junctions between joists and primary beam, perhaps by taking up the sag over the top of the main beams, or if a ceiling void permits, introducing additional timbers at right angles to the primary to create a grid rather than beam system. Rotten built-in joist ends are commonly repaired using a timber splice, a short joist run in parallel and bolted alongside. To cure the problem, the new ends are usually hung from the wall on joist hangers. The restoration or conversion of a historic building will invariably require pipes and wires to be fed through the floor void. Source

Sorensen R.,Ramboll
Structural Engineering International: Journal of the International Association for Bridge and Structural Engineering (IABSE) | Year: 2013

This paper concerns the design and building process of a new pedestrian bri dge called "the Acrobat". The bridge is located in Oslo nearby the city's new opera and other prestigious buildings. The Acrobat has a total length of approximately 200 m. The four 7-shaped pillars and the truss with the hanging gangway give the bridge a unique appearance. Source

Stottrup-Andersen U.,Ramboll
Journal of the International Association for Shell and Spatial Structures | Year: 2014

The analysis and design of masts and towers requires special knowledge and experience, especially when it concerns guyed masts. The special problems related to these structures are underlined by the many collapses during the years. The many design requirements for such antenna supporting structures are often mutually contradictory, and the overall structural layout may have a dramatic effect on the loading on the structure. The loads are mainly from wind and ice and combinations of these, and the dynamic nature of wind loading has to be taken into account as masts and towers are slender structures and sensitive to dynamic loads. This paper gives a brief introduction to the problems related to the design, mentioning several practical examples. The aesthetic elements are becoming more and more important for antenna supporting structures and are also mentioned. The IASS Working Group No. 4 Masts and Towers is the only international forum for the exchange of knowledge and experience within the field of masts and towers, and the activities of this Working Group are briefly mentioned in the paper. © 2014 by ULRIK STØTTRUP-ANDERSEN. Source

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