Inst. Bauingenieurwesen

187 Items

Recent Submissions
Passive earth pressure under shock-type loads

Saidel, Tudor (2020)

Knowing the passive earth resistance under shock-type loads is extremely important to assure that the ultimate and serviceability limit states are not exceeded in the case of accidental actions due to collision of vehicles with structures. Previous papers that provide a calculation model validated by tests are not known. The research started with the static passive earth resistance mobilization...

Numerical evaluation of the soil behavior during pipe-pile installation using impact and vibratory driving in sand

Daryaei, Reza ; Bakroon, Montaser ; Aubram, Daniel ; Rackwitz, Frank (2020-04-30)

Pipe-piles are installed using impact or vibratory driving which influences the soil in different ways including the void ratio and stress distribution. Such complex problems are hard to investigate on the field as well as using numerical methods. Here, a sophisticated numerical approach is employed to evaluate the soil behavior during pile installation. Also, a sensitivity analysis on the freq...

Investigation of Mesh Improvement in Multimaterial ALE Formulations Using Geotechnical Benchmark Problems

Bakroon, Montaser ; Daryaei, Reza ; Aubram, Daniel ; Rackwitz, Frank (2020-05-21)

Two of the mesh-based numerical approaches suitable for geotechnical large deformation problems, the multimaterial arbitrary Lagrangian–Eulerian (MMALE) and the coupled Eulerian–Lagrangian (CEL) methods are investigated. The remeshing step in MMALE was claimed to hold advantages over CEL, but its effects on application problems are not studied in detail. Hence, the possible capabilities and imp...

Expertise- und simulationsbasierte, mehrstufige Tragwerksoptimierung im Entwurf von Windenergieanlagen

Köpke, Bodo Harold (2020)

In der vorliegenden Arbeit werden zwei Ziele verfolgt: erstens die Entwicklung eines Verfahrens zur integrierten Kombination von Topologie-, Form- und Dimensionsoptimierung auf Grundlage des synergetischen Einsatzes von Expertenwissen und Simulationen; und darauf aufbauend zweitens die Integration des entwickelten Verfahrens in den Entwurfsprozess eines neuartigen Tragwerks für Windenergieanlag...

Optimization-based decision-making models for disaster recovery and reconstruction planning of transportation networks

Zamanifar, Milad ; Hartmann, Timo (2020-07-26)

The purpose of this study is to analyze optimization-based decision-making models for the problem of Disaster Recovery Planning of Transportation Networks (DRPTN). In the past three decades, seminal optimization problems have been structured and solved for the critical and sensitive problem of DRPTN. The extent of our knowledge on the practicality of the methods and performance of results is ho...

EG-ICE 2020 Workshop on Intelligent Computing in Engineering

(2020)

The 27th EG-ICE International Workshop 2020 brings together international experts working at the interface between advanced computing and modern engineering challenges. Many engineering tasks require open-world resolutions to support multi-actor collaboration, coping with approximate models, providing effective engineer-computer interaction, search in multi-dimensional solution spaces, accommod...

Decision making in structural engineering problems under polymorphic uncertainty

Petryna, Yuri ; Drieschner, Martin ; Kähler, Philipp (2019-02-22)

The treatment of diverse uncertainties is an important challenge in structural engineering problems, especially from the viewpoint of realistic analysis. Inaccuracy and variability are always present and have to be quantified by either probabilistic, possibilistic, polymorphic or other uncertainty approaches. Regardless to the applied uncertainty quantification method, the numerical predictions...

Zur ortsaufgelösten Quantifizierung von Chlorid in Beton mit der laserinduzierten Plasmaspektroskopie

Millar, Steven (2020)

Die chemische Analytik von Beton gehört zu den grundlegenden Untersuchungen bei der Zustandserfassung von Stahl- und Spannbetonbauwerken. Insbesondere die Quantifizierung des Chloridgehalts in Abhängigkeit der Bauteiltiefe stellt, neben weiteren Einflussparametern, einen wichtigen Indikator für die Korrosionsgefährdung des eingebetteten Stahls dar. Mit konventionellen Analyseverfahren können, u...

GIS-based ontology for surrounding buildings to support building renovation

Daneshfar, Maryam ; Hartmann, Timo ; Rabe, Jochen (2020-05-27)

This research focuses on developing an ontology for representing knowledge about the surrounding environment of a building in an urban context, considering the geo-spatial objects and processes such as built environment, vegetation, population and so on. The ontology can be useful to create a knowledge management system for different experts involved in the process of the building renovation, t...

Entwicklung von Handlungsempfehlungen für eine kooperative Terminsteuerung bei Bauprojekten

Rodde, Nina (2020)

Bauverträge sind besondere Verträge und stellen damit hohe Anforderungen an die Vertragspartner. Die Errichtung des Bauwerks erfordert zumeist mehrere Jahre. Gerade zum Vertragsschluss steht oftmals nicht ganz genau fest, wie das fertige Objekt aussehen wird. Folglich sind Änderungen meist nicht zu vermeiden. Die Einmaligkeit der Produkte und die vielen Risiken, die auch bei noch so umsichtiger...

Supplemented material to: "Model-driven set of decision attributes for disaster recovery planning of transportation networks"

Zamanifar, Milad (2020)

Natural, anthropogenic or socio-environmental hazards develop to a disaster in exposed and vulnerable urban setting and consequently impose destructive impacts on transportation networks. Equitable attributes are essential for developing decision support systems that assist users to make well-informed decisions responding to post-disaster circumstances. Attributes as a component of decision fac...

Interaction of Different Charged Polymers with Potassium Ions and Their Effect on the Yield Stress of Highly Concentrated Glass Bead Suspensions

Lu, Zichen ; Becker, Simon ; Leinitz, Sarah ; Schmidt, Wolfram ; von Klitzing, Regine ; Stephan, Dietmar (2020-03-25)

The interaction of different charged polymers, namely anionic polycarboxylate superplasticizer (PCE) and neutral polyethylene glycol (PEG) with potassium ions, and their effect on the yield stress of highly concentrated glass bead suspension (GBS), were studied under different concentrations of potassium ions ([K+]). It was found that, compared to the neutral PEG, the negatively charged PCE can...

An Investigation of the Mechanical and Physical Characteristics of Cement Paste Incorporating Different Air Entraining Agents using X-ray Micro-Computed Tomography

Abd Elrahman, Mohamed ; El Madawy, Mohamed E. ; Chung, Sang-Yeop ; Majer, Stanisław ; Youssf, Osama ; Sikora, Pawel (2020-01-06)

Improving the thermal insulation properties of cement-based materials is the key to reducing energy loss and consumption in buildings. Lightweight cement-based composites can be used efficiently for this purpose, as a structural material with load bearing ability or as a non-structural one for thermal insulation. In this research, lightweight cement pastes containing fly ash and cement were pre...

Investigation of the Incompatibilities of Cement and Superplasticizers and Their Influence on the Rheological Behavior

Pott, Ursula ; Jakob, Cordula ; Jansen, Daniel ; Neubauer, Jürgen ; Stephan, Dietmar (2020-02-21)

The rheological behavior of cement paste and the improvement of its flowability takes center stage in many research projects. An improved flowability can be achieved by the addition of superplasticizers (SP), such as polycarboxylate ethers (PCE). In order to be able to use these PCEs effectively and in a variety of ways and to make them resistant to changes in the environment, it is crucial to ...

Enchytraeus crypticus Avoid Soil Spiked with Microplastic

Pflugmacher, Stephan ; Huttunen, Johanna H. ; Wolff, Marya-Anne von ; Penttinen, Olli-Pekka ; Kim, Yong Jun ; Kim, Sanghun ; Mitrovic, Simon M. ; Esterhuizen-Londt, Maranda (2020-02-10)

Microplastics (MPs) of varying sizes are widespread pollutants in our environment. The general opinion is that the smaller the size, the more dangerous the MPs are due to enhanced uptake possibilities. It would be of considerably ecological significance to understand the response of biota to microplastic contamination both physically and physiologically. Here, we report on an area choice experi...

Zur Eignung der Impulsantwort aus regularisierter Dekonvolution für die Pfahlintegritätsprüfung bei Schwinganregung mit einem elektrodynamischen Shaker

Ertel, Jens-Peter (2020)

A key factor for the success of a pile foundation is the pile integrity and its verification after installation into the subsoil. In the last decades, different methods for pile integrity testing were researched and designed with various advantages / disadvantages. These methods were introduced to the market with varying success. Within three years of the EU research project ”PileInspect“ the ol...

Vorgespannter Carbonbeton im Brückenbau

Apitz, Andreas (2020)

Bewehrungen und Spannglieder aus Carbon (= CFK, kohlefaserverstärkter Kunststoff) eignen sich sehr gut für Betonbrücken, da sie nicht korrodieren, nicht ermüden, sehr zugfest und trotzdem leicht sind. Mit Carbonspanngliedern vorgespannte Carbonbetonbrücken werden seit über 30 Jahren gebaut, haben sich bisher aber noch nicht durchsetzen können. Neben dem hohen Materialpreis des Carbons liegt ein...

P2Endure EU Project Demonstration Data for the Configurator

Jungmann, Manuel (2020-03-11)

During the P2Endure project we created a number of virtual demonstrations of the configurator that were not integrated into the e-Marketplace Open Source code. The results of these demonstrations have been reported in D2.6 of the project and will be published in a number of pending scientific articles. The accompanying models for these publications are posted for open access at the research dat...

Study on the production of core-shell structured lightweight aggregate by cold-bonding agglomeration process and its utilization in concrete

Tajra, Feras (2020)

Lightweight aggregate concrete has been widely used in different construction applications due to its advantageous characteristics such as low density, low thermal conductivity and good durability properties. Compared to conventional concrete, lightweight aggregate concrete is made by replacing normal weight aggregate with lightweight aggregate, which is taken from natural resources or produced...

Electronic supplemental material

Simons, Franz (2020-01-31)

This is the electronic supplemental material to the doctoral thesis "A robust high-resolution hydrodynamic numerical model for surface water flow and transport processes within a flexible software framework". The full source code of the Hydroinformatics Modeling System (hms) is available at TU Berlin GitLab. Access to the GIT repository is granted by the Chair of Water Resources Management and ...