Mittermayr F.,University of Graz |
Rezvani M.,TU Darmstadt |
Baldermann A.,University of Graz |
Hainer S.,TU Darmstadt |
And 4 more authors.
Cement and Concrete Composites | Year: 2015
Two newly developed cement-reduced eco-friendly concretes with high limestone powder content and low water/powder ratio were tested for sulfate resistance. Mortar samples with a paste composition of eco- as well as conventional concretes were immersed in 30 g l-1 Na2SO4 and saturated Ca(OH)2 reference solutions for 200 days at 8 °C. To evaluate the reaction mechanisms of progressing sulfate attack a combined approach of mechanical, mineralogical, and microstructural methods was applied. Gypsum and bassanite neo-formations related linearly to the expansion during sulfate exposure, except for one sample where ettringite co-precipitated. Thaumasite formation was not observed in spite of potentially favorable conditions. This is considered to be related to the evolution of the experimental solutions, kinetic effects, and the competing formation of CaCO3 polymorphs triggered by the usage of superplasticizer. Both eco-friendly mixes exhibited a better sulfate resistance than their corresponding reference samples and are therefore suggested to be applicable in low sulfate-loaded environments according to DIN EN 206-1. Eco-friendly concrete based on CEM III/B performed superior against sulfate attack and is expected to withstand even severe sulfate exposure despite a much higher water/cement ratio than required by the standard. © 2014 Elsevier Ltd.
Agency: European Commission | Branch: FP7 | Program: CP | Phase: EeB-ICT-2010.10.2 | Award Amount: 4.65M | Year: 2010
HESMOS will achieve an industry-driven holistic approach for sustainable optimisation of energy performance and emissions (CO2) reduction through integrated design and simulation, while balancing investment, maintenance and reinvestment costs. The objective is to close the gaps between existing intelligent building/facilities data so that complex lifecycle simulation can easily be done in all design, refurbishment and retrofitting phases where the largest energy saving potentials exist. This will be achieved by (1) extending existing BIM, energy simulation and cost calculation tools, so that they can seamlessly exchange the required data, (2) integrating advanced energy simulation tools into the design and FM process, so that BIM-CAD and FM tools can be used as building energy simulator and gap identifier, (3) developing new applications that can visualize building performance in easy to understand way and can quickly display impacts of changed building/space parameters, (4) developing new Cockpit functionality in BIM-CAD on EPBD basis to provide fast feedback of the impact of design parameters on lifecycle energy performance, (5) extending BIM-CAD to model and manage buildings and surrounding areas, and (6) extending BIM-CAD by web services to act as Integrated Virtual Energy Laboratory (IVEL) enabling the study of design and retrofitting alternatives concerning energy performance and total costs. An innovative SOA around the kernel functionality of BIM-based CAD/FM will be applied. Information interoperability will be achieved by enhancing BIM with energy and emissions features to a new sharable eeBIM. Intelligent access methods and a specialised ontology will be developed to enable multi-system integration and management of material, climate and product databases and data from sensor networks and other ICT sub-systems into CAD/FM. An extensive 30-month validation program at 2 PPP projects will be carried out during the project.
Agency: European Commission | Branch: FP7 | Program: CP-IP | Phase: EeB.NMP.2013-5 | Award Amount: 11.10M | Year: 2013
eeEmbedded will develop an open BIM-based holistic collaborative design and simulation platform, a related holistic design methodology, an energy system information model and an integrated information management framework for designing energy-efficient buildings and their optimal energetic embedding in the neighbourhood of surrounding buildings and energy systems. A new design control and monitoring system based on hierarchical key performance indicators will support the complex design collaboration process. Knowledge-based detailing templates will allow energy simulations already in the early design phase, and BIM-enabled interoperability grounded on a novel system ontology will provide for a seamless holistic design process with distributed experts, and a seamless integration of simulations in the virtual design office (energy performance, CO2, CFD, control system, energy system, climate change, user behaviour, construction, facility operation), thus extending it to a real virtual design lab. A test period of 12 project months, overlapping the first 42 development months of the project, will provide for real pre-market validation of the system on two real embedded buildings of different types, namely (1) residential or office, and (2) hospital buildings. The development work will be soundly based on 2 business models the business model of the owners and hence the equipment providers and the business model of construction and design companies, and on a set of ISO and industry standard data structures and specifications such as IFC, STEP, CityGML and OWL. A new ontology-based Link Model will provide the bridge between the multiple physical and mathematical models involved in the eeBuilding domain warranting the desired data and services interoperability.
Hassler-Kiefhaber D.,OBERMEYER Planen Beraten GmbH |
Knittel K.,Ingenieurburo Francke Knittel GmbH |
Webler H.,Icon Ing. Buro H. Webler
WasserWirtschaft | Year: 2011
In the state of Rheinland-Pfalz new approaches for the development of flood risk management plans (FRMP) are pursued. Flood risk minimizing measures which can be realized in the near future are prioritized. All parties involved, key players as well as affected citizens, participate in the development process by taking part in a serial of workshops. The FRMP Nahe is a pilot project, developed under guidance of the Water Management Administration.
Gebbeken N.,University of Federal Defense Munich |
Gebbeken N.,AJG Ingenieure GmbH |
Braun M.,Obermeyer Planen Beraten GmbH |
Hachmann T.,Obermeyer Planen Beraten GmbH |
Yilmaz H.,AJG Ingenieure GmbH
International Journal of Protective Structures | Year: 2012
Most existing built infrastructure, especially historical monuments, has not been designed in accordance with earthquake resistant standards. Earthquake engineering as a specific field of science and practice has only been developed over the past fifty years. Therefore, many buildings across the globe need to be inspected and to be assessed in order to determine their resistance against earthquakes based on today's knowledge. Based on safety standards and a risk assessment, the earthquake engineer provides information to the owner as to use the building in the future in order to fulfill economic as well as safety demands. This paper outlines the inspection procedure, defines the methodology of reconnaissance on site and describes the subsequent assessment of buildings from the practical point of view.
Hochmuth M.,OBERMEYER Planen Beraten GmbH
Bautechnik | Year: 2016
With the digitalization of construction the planning and implementation process is undergoing a fundamental methodological transformation. The employment of BIM (Building Information Modelling) permits end-to-end planning. By means of sample projects it is explained how - above all in the service phases conceptual, preliminary and detailed design - intelligent parameterized building models can be set up in bridge and civil engineering. The additional combination with alignment and GIS data in these phases furnishes a flexible and robust basis upon which to create a holistic evaluation of planning concepts. With the application of a parameterized, object-oriented complete model it is possible to realize an integral process chain across the whole planning and implementation period as well as across the entire life cycle. The 3D model contains, apart from the individual structural components, project-specific attributes and information. Coupling the digital model to resource, cost and time scheduling and simulating the construction sequence yield complex 4D and 5D bridge models. © 2016 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.
Lackner A.,Obermeyer Planen Beraten GmbH |
Herrmann W.,Obermeyer Planen Beraten GmbH
42nd International Congress and Exposition on Noise Control Engineering 2013, INTER-NOISE 2013: Noise Control for Quality of Life | Year: 2013
Due to the plan approval order of the year 2002 for the construction of the "Katzenbergtunnel" in south-west Germany, a vibration forecast had to be done to protect the buildings above. This was performed based on measurements of the transfer function from the basements to the floors of the buildings combined with vibration data gained from other tunnels. The results showed that suitable protection measures would have to be applied for the prevention of annoying vibrations in the buildings. After the construction of the tunnel transmission measurements of vibrations generated by a vibration roller were performed to analyze the transfer function "tunnel to the buildings basements". The obtained data was used as an input for a prognosis model considering the amount of train rides to calculate the vibration levels and the vibration induced airborne noise. Based on the results minimum requirements for a protection system were elaborated and a mass- And-spring system got the vote. After the installation of the system in the tunnel, the actual mass- And-spring system characteristics had to be verified by measurements during train- Test-runs. Finally, control measurements in random houses above the track were made after the tunnels start up giving the opportunity for verification of the forecasts.
Esfahani N.N.,OBERMEYER PlanenBeraten GmbH |
Esfahani N.N.,TU Dresden |
Balder R.,OBERMEYER PlanenBeraten GmbH |
Scherer R.J.,TU Dresden
eWork and eBusiness in Architecture, Engineering and Construction - Proceedings of the European Conference on Product and Process Modelling 2012, ECPPM 2012 | Year: 2012
Using computer programs, Intelligent Road Design attempts to establish a connection between two points through an economical path. Born around 30 years ago, Computer Aided Design (CAD) can provide rapid evaluation of alternative alignments, optimization techniques for road planners and powerful search tools for a large number of alternative alignments. Geospatial Information System (GIS) with its spatio-temporal analysis tools is an extremely helpful solution in the very early steps of alignment planning, especially for long railway projects. Therefore Road and Railway (Rd & Rl) Design is a suitable area of help for GIS design applications, as such projects start with topographic maps and map analysis methods. When used together effectively, CAD and GIS fulfill the prerequisites for streamlining decision making and reducing inefficiencies in the design and execution of critical operations. © 2012 Taylor & Francis Group.