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Lantsoght, E.O.L. (author), Yang, Y. (author), van der Veen, C. (author), de Boer, A. (author), Hordijk, D.A. (author)Loading protocols and acceptance criteria are available in the literature for load tests on buildings. For bridges, proof load tests are interesting when crucial information about the structure is missing, or when the uncertainties about the structural response are large. The acceptance criteria can then be applied to evaluate if further loading...journal article 2017
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Lantsoght, E.O.L. (author), Koekkoek, R.T. (author), Yang, Y. (author), van der Veen, C. (author), de Boer, A. (author), Hordijk, D.A. (author)Proof load testing can be a suitable method to show that a bridge can carry the required loads from the code without distress. This paper addresses the preparation, execution, and analysis of a proof load test on a four-span reinforced concrete solid slab bridge, viaduct de Beek. The bridge has one lane in each direction, but was restricted to a...conference paper 2017
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Koryakovskiy, I. (author), Kudruss, M. (author), Babuska, R. (author), Caarls, W. (author), Kirches, Christian (author), Mombaur, Katja (author), Schlöder, Johannes P. (author), Vallery, H. (author)Model-free reinforcement learning and nonlinear model predictive control are two different approaches for controlling a dynamic system in an optimal way according to a prescribed cost function. Reinforcement learning acquires a control policy through exploratory interaction with the system, while nonlinear model predictive control exploits an...journal article 2017
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Ponnusami, S.A. (author), Pathan, Mehtab V. (author), Erice, Borja (author), Petrinic, Nik (author)The objective of this research is to explore the effect of microstructural defects on the mechanical properties of fiber reinforced composites. In particular, two kinds of defects are considered in the study, namely, matrix pores and interface precracks. Three-dimensional (3-D) finite element analyses are conducted on Representative Volume...conference paper 2017
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Chen, Y. (author), Veer, F.A. (author), Copuroglu, Oguzhan (author)Concrete is by volume the most widely used building material all over the world. The concrete industry emits large quantities of greenhouse gases. Therefore, developing low CO2 concrete becomes an urgent issue for those countries with significant concrete production and consumption. In recent years, 3D concrete printing (3DCP) which is a new...review 2017
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Koryakovskiy, I. (author), Vallery, H. (author), Babuska, R. (author), Caarls, W. (author)Reinforcement learning techniques enable robots to deal with their own dynamics and with unknown environments without using explicit models or preprogrammed behaviors. However, reinforcement learning relies on intrinsically risky exploration, which is often damaging for physical systems. In the case of the bipedal walking robot Leo, which is...journal article 2017
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Kubalík, Jiří (author), Alibekov, Eduard (author), Babuska, R. (author)Model-based reinforcement learning (RL) algorithms can be used to derive optimal control laws for nonlinear dynamic systems. With continuous-valued state and input variables, RL algorithms have to rely on function approximators to represent the value function and policy mappings. This paper addresses the problem of finding a smooth policy...journal article 2017
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Smits, J.E.P. (author)This paper reviews the use of fiber-reinforced polymers (FRPs) in architectural and structural bridge design in the Netherlands. The challenges and opportunities of this relatively new material, both for the architect and the engineer, are discussed. An inventory of recent structural solutions in FRP is included, followed by a discussion on...journal article 2016
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Regtuit, R.M. (author)Acceptance of automation has been a bottleneck for successful introduction of automation in Air Traffic Control. Strategic conformal automation has been proven to increase automation acceptance, by creating a better match between automation and operator decision-making. In this paper strategic conformal automation for Air Traffic Control is...master thesis 2016
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Chen, Zhipei (author), Koleva, D.A. (author)Stray current circulating in reinforced concrete structures may initiate corrosion or accelerate existing corrosion processes on embedded reinforcement. In some cases, the range of dangerous or unwanted interactions of stray currents under favorable conditions (environment), is much broader than is generally recognized. All these show that...journal article 2016
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- Abdalla, K. (author) master thesis 2016
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Maatkamp, T.W.P. (author)A hot topic in the Netherlands is the safety reassessment of dikes. Currently several (river)dikes are being reinforced to withstand a given normative high water level. The environment of those dikes is often characterised by small floodplains and urban areas right next to the dike, wherefore standard geo-technical measures cannot be applied....master thesis 2016
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van Spaandonk, V. (author)Modern robotic systems are increasingly expected to interact with unstructured and unpredictable environments. This has reiterated the importance of sophisticated reasoning and adaptive motor skill learning. Although low-level methodologies for sensorimotor control have been relatively well studied, constrained motion for robotic manipulators in...master thesis 2016
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Abi Morshed, F. (author)Traditionally, the transmission network transported electricity over extended distances from local large scale electricity generation plants to distribution networks that transported electricity to end consumers (Ekanayake, 2012). In order to ensure that such a system remains operational, a Distribution System Operator (DSO) maintains, operates...master thesis 2016
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Jiang, X. (author), Song, Jie (author), Qiang, X. (author), Kolstein, M.H. (author), Bijlaard, F.S.K. (author)Influence of moisture absorption/desorption on the flexural properties of Glass-fibre-reinforced polymer (GFRP) laminates was experimentally investigated under hot/wet aging environments. To characterize mechanical degradation, three-point bending tests were performed following the ASTM test standard (ASTM D790-10A). The flexural properties...journal article 2016
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Oikonomopoulou, F. (author), Bristogianni, T. (author), Karron, Kaisa (author), Groot, C.J.W.P. (author), Veer, F.A. (author), Nijsse, R. (author)In this paper a pioneering, transparent restoration methodology is presented, introducing structural glass elements to substitute missing components of damaged monuments and simultaneously reinforce the original structure. To prove the feasibility of the concept, a damaged medieval tower in Toolse, Estonia is selected as a case study: Soil...conference paper 2016
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- Evangeliou, P. (author) master thesis 2016
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Smeets, B.J.R. (author)Composite grid-stiffened and lattice structures have been the focus of an increasing amount of research over the past decades, mainly because of their excellent structural performance. Most of the previous and current research focuses on analysis, manufacturing, and optimization of the base structure. Although more and more is becoming known...master thesis 2016
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van der Wijden, R. (author)New flexible teaching methods for robotics are needed to automate repetitive tasks that are currently still done by humans. For limited batch sizes, it is too expensive to teach a robot a new task (Smith & Anderson, 2014). Ideally, such flexible robots can be taught a new task by a non-expert. A non-expert is a person who knows the task the...master thesis 2016
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Najafi, E. (author)Sequential composition is an effective supervisory control method for addressing control problems in nonlinear dynamical systems. It executes a set of controllers sequentially to achieve a control specification that cannot be realized by a single controller. Sequential composition focuses on the interaction between a collection of pre-designed...doctoral thesis 2016