Andrea Franza , Lars Vabbersgaard Andersen , Felipe Prada & Lau Fogh
The project tackles the geotechnical aspects of shared anchors for floating offshore wind turbines (FOWTs), needed by the EU to reach the targeted share of renewable energy. With a focus on anchors in sandy seabeds, the project will conceive and test an innovative grouped anchor concept.Description
01/01-2025 → 31/12-2027
Andrea Franza , Lars Vabbersgaard Andersen , Felipe Prada , Giuseppe Abbiati & Nikolaj Braüner Bjerge
This project focuses on improving the design of floating wind turbines (FOWTs) by developing a new approach for anchoring and mooring systems. These turbines are key to harnessing renewable energy from deep-water locations that are currently not suitable for traditional offshore wind farms. The main goal of the project is to create a new computational framework that can model multiple floating turbines connected by mooring lines to shared suction anchors. This model will help optimize the design of the anchoring systems for different environmental conditions.Description
01/11-2024 → 31/10-2027
Lars Vabbersgaard Andersen , Steffen Petersen , Søren Wandahl , Stephanie Therkelsen Salling , Laszlo Mangliar , Markus Matthias Hudert & Kristine Strøm
The construction sector accounts for around 40% of society's waste and energy consumption and 50% of the raw-material use, so it is imperative to find circular solutions. We need regenerative construction that promotes the green transition. In the interdisciplinary project ASCEND - Advancing Sustainable Circularity for Eco-friendly Net-zero Developments, researchers from Lund University and Aarhus University enter into dialogue with the construction industry in the Öresund-Kattegatt-Skagerrak region.
The mission is clear: We must have a common direction towards absolute sustainability!
We will work together in parallel in three different work packages:
EXISTING BUILDINGS can be viewed as material banks, but there are no established methods for assessing the balance of the account. We will therefore work with mapping of buildings and materials as well as risk-based decision support to decide whether buildings should be dismantled or preserved. This can assess whether renovation or conversion to other uses are better than reusing materials and components.
NEW BUILDINGS must be constructed from renewable materials and so that they can contribute to future reuse. Modular timber construction has great potential here. We therefore uncover the construction industry's current approach with a focus on identifying opportunities for better material utilization and reuse of materials in modules, just as we work with principles for disassembly and adaptation of modules.
MATERIALS AND COMPONENTS must allow safe deconstruction and their quality must be known for them to be optimally reused. We will therefore work with techniques for safe deconstruction of buildings as well as classification methods, where the quality of reused materials and components is determined through non-destructive testing methods.Description
01/10-2024 → 30/09-2027
Andrea Franza & Adriana Hernandez
collaboration with Ove Arup & Partners. Arup is an independent firm of engineers, consultants, designers, planners, and technical specialists offering a broad range of services worldwide.
Cities’ drive to become carbon neutral requires the enhancement of transport infrastructure. Underground construction of new metro tunnels and circular shafts is currently over-engineered due to empiricisms in design methods leading to unnecessary environmental and economic costs. The project objectives are to establish a data-driven analysis method that integrates analytical excavation-structure-interaction modelling for varying structural typologies (buildings, pipelines, tunnels) with real-world local and remote measurement and to implement this analysis method in the workflow of Arup by using a probabilistic approach that can optimize the design in terms of costs and carbon footprint while quantifying the influence of uncertainties in risk of damage assessment.Description
01/04-2024 → 01/04-2027
Urban densification, despite its economic and environmental opportunities, brings an increase in noise- and vibration-producing sources, which, when coupled with the rising use of lightweight buildings, risks deteriorating living conditions that have a negative impact on health. The densification of our cities will continue unabated, as will our reliance on lightweight buildings that is fueled by sustainability concerns.
We propose to develop a software using novel machine learning methods in combination with recently developed computational methods. We suggest that timely and informed decision-making in the design of lightweight buildings is necessary to mitigate the negative synergy of urban density, lightweight structures, and rise in noise sources. This can be achieved via the use of computational prediction tools, which are trained, calibrated and validated to measured data.
The research aims at easing vibroacoustic performance prediction during conceptual design of lightweight buildings, thus enabling mitigation of noise and vibration in urban environments and a more efficient structural design using less resources. The principal investigator has assembled a team of established international scholars, with complementary technical expertise. The software will ease the assessment of vibrations and structure-borne noise, which leads to resource-savings and mitigated effects of noise and vibrations, and a fair competitiveness of lightweight buildings in dense urban areas.Description
01/01-2024 → 31/12-2027
Andrea Franza , Assaf Klar & Nicolas von Solms
This project explored a new innovative technique for mechanical energy storage by forming subsurface structures at depths between 10m-100m within the (otherwise) permeable ground and deploying a compressed gas via a fluid system. In specific, the generation and operation of CO2-hydrate subsurface capsules, which is a scalable concept, can be an alternative or integration to power-to-x systems for offshore wind.Description
01/08-2023 → 31/08-2024
Kenny Kataoka Sørensen , Lars Vabbersgaard Andersen & Hans Henning Stutz
According to the Danish Energy Agency’s latest projection, the Danish power grid will reach 100% renewable energy no sooner than 2028. However, we can already now see a demand for a more flexible and secure power distribution due to the fluctuating energy production and consumption. Most experts suggest energy storage systems as the most sustainable, ideally suited and lasting solution.
The aim of this project is to develop and test critical parameters for a technology that enables storing energy in water according to the well-known principle of Pumped Hydro Storage (PHS) – but in an underground geomembrane, i.e. by installing a 10 x10 meter mock-up. The project focuses on geotechnical conditions and membrane design and will include the conduction of a range of examinations including the technological adaptation in the energy market in combination with various renewable energy sources and business cases.Description
01/09-2020 → 28/02-2022
Many Scandinavian municipalities have successfully reduced their energy consumption during operation according to the EU requirements, especially during the last 5¿10 years. However, not everyone and not to a minimum. Therefore, in the short term, a roll-out of best practices provides good opportunities, and in the long term it is necessary to address the embodied energy to avoid using more than half of the energy related to the life of a building, already in the production and construction phase. The project aims to answer two basic questions:
1. How can we reduce energy consumption in public buildings, reported as operational energy and embodied energy, while avoiding sub-optimization?
2. How can policies be formulated, and knowledge shared between stakeholders, such that the reduction becomes a reality for the benefit of society?
In this context, we study and develop good examples for minimizing operational energy and the right balance between the construction of new buildings and the renovation of existing one. This points towards two scenarios: building lightweight or reusing buildings/building components, thereby utilizing the already embodied energy in new or renovated buildings. We address the minimization of energy in public building while keeping an eye on a great indoor environment and good functionality of the design. Energy reduction can only be realized by considering, respectfully, the needs and behaviour of the end-users of a building.Description
01/07-2020 → 30/09-2022
Asger Gramkow , Lars Vabbersgaard Andersen , Kenny Kataoka Sørensen & Hans Henning Stutz
Soil-membrane interface testing and modelling in connection to underground Pumped Hydro Storage systemDescription
01/02-2019 → 30/06-2019
Kenny Kataoka Sørensen & Paulina Agnieszka Janusz
DHRTC Radical Innovation Spring (RIS) projectDescription
01/09-2018 → 30/11-2018
Jannie Knudsen , Kenny Kataoka Sørensen , Jørgen S. Steenfelt & Helle Trankjær
Industrial PhD project:
According to the Danish National Annex to Eurocode 7, part I, the shaft resistance for a bored cast-in-place pile should not be assumed to be greater than 30 per cent of the shaft resistance of the corresponding driven pile, and the toe resistance is maximised to 1000 kPa. Since 1977 this principle has been enforced (code requirement) in Denmark, allegedly due to execution problems encountered in one or two un-documented case histories.
Hence, it is widely recognised that this reduction in bearing capacity is believed to be overly conservative. If the bored cast-in-place pile is established correct, the reduction of the shaft resistance is still applicable due to limited understanding of the governing mechanism and limited knowledge of the complex soil-pile interaction.
A consequence of this lack of understanding is that bored cast-in-place piles are often designed too conservative, and the bored cast-in-place piles are built more expensive than what is required.
This Industrial PhD project will investigate the shaft and toe resistance of bored cast-in-place piles based on full-scale field tests, model field tests, geotechnical and structural monitoring, and develop a first order analytical method for determination of the shaft (and toe) resistance for bored cast-in-place piles.Description
01/06-2018 → 31/05-2021
Jakub Gabriel Kania & Kenny Kataoka Sørensen
Industrial PhD project:
Precast driven piles or cast-in-place bored piles are often used in connection to construction work on sites with soft soil conditions. If the upper layers of soft soil later experience settlement, then the piles will, in addition to the building load, also be affected by a downwards acting force (termed negative skin friction or down drag) resulting from the adhesion between the soil and the pile in those layers which settle relative to the pile.
Hence, a reliable assessment of negative skin friction is a vital part of pile design when piles are installed in soft ground conditions. However, current guidelines and design practice in Denmark are believed to be overly conservative due to limited understanding of the governing mechanism and limited knowledge regarding the effect of pile material and ground conditions on the development of negative skin friction. Especially the influence of bitumen coating on the development of negative skin friction is poorly understood and in Denmark and also generally in the Nordic countries, there exist only very limited documentation to prove the actual effect of bitumen coating.Description
01/10-2016 → 30/09-2019
European Regional Development Fund, Interreg V.
co-applicant, Danish coordinatorDescription
01/01-2016 → 01/01-2018
Danish National Advanced Technology Foundation Description
01/01-2013 → 01/01-2016
Dokumentation af 1-punkts flydegrænse og lineær fremregning til plasticitetsindeks på baggrund af dataindsamling fra GEO's database og litteraturstudie.Description
01/02-2012 → 31/01-2013
01/02-2012 → 01/05-2013
Verification/investigation into the correlation between the angle of shearing resistance and the plasticity index of heavily overconsolidated Danish claysDescription
01/02-2012 → 09/01-2013
Danish National Advanced Technology Foundation . Work package leaderDescription
01/01-2010 → 01/01-2014
European Regional Development Fund, Interreg IV. Work package leaderDescription
01/01-2010 → 01/01-2013
DSF. Work package leaderDescription
01/01-2009 → 01/01-2014
EFPDescription
01/01-2005 → 01/01-2007
