Searched for: subject%3A%22reinforcements%22
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Nagaki, K. (author)
Reinforcement learning (RL) is a machine learning technique whereby the controller learns the control law by optimizing the received cumulative amount of reward. A reward is an instantaneous evaluation of the applied action at the current state, given by reward function. However in theory the reward function is assumed to be given, in practice...
master thesis 2015
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Woodington, W. (author), Bergsma, O.K. (author), Schipper, H.R. (author)
A composite textile reinforced concrete (TRC) material is developed to overcome the difficulties of constructing double-curved freeform structures. This is possible by shear-deformation of the woven reinforcement. It affects the direction of reinforcement and thickness, resulting in variable orthotropic properties over the surface. The research...
conference paper 2015
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Van der Laan, T.A. (author)
The works [Volodymyr et al. Playing atari with deep reinforcement learning. arXiv preprint arXiv:1312.5602, 2013.] and [Volodymyr et al. Human-level control through deep reinforcement learning. Nature, 518(7540):529–533, 2015.] have demonstrated the power of combining deep neural networks with Watkins Q learning. They introduce deep Q networks ...
journal article 2015
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Postma, J.H. (author)
Conventionally programmed systems (e.g. robots) are not able to adapt to unforeseen changes in their task or environment. Reinforcement learning (RL), a machine learning approach, could grant this flexibility. Many fields of work could greatly benefit from this, be it in terms of cost, time or some other parameter. With RL, a learning agent...
master thesis 2015
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Teeuwen, A.S. (author)
There are different options to obtain a structural glass beam with a span of more than 6 meters. One option is segmentation, which has many advantages compared with the other options. However, the choice for segmentation is often avoided, because of aesthetical reasons. Existing connections, even the most slender ones, result in a reduction of...
master thesis 2015
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Van Eekelen, S.J.M. (author)
A basal reinforced piled embankment consists of a reinforced embankment on a pile foundation. The reinforcement consists of one or more horizontal layers of geosynthetic reinforcement (GR) installed at the base of the embankment. The design of the GR is the subject of this thesis. A basal reinforced piled embankment can be used for the...
doctoral thesis 2015
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Mirtsopoulos, I. (author)
Ever since the idea of truss structures was conceived and later were expanded into three dimensional structures forming space frames, jointing has been a challenge. The evolution of jointing systems includes three main methods: connection with a node, connection with a prefabricated unit and connection without a node (e.g. welding). Delving more...
master thesis 2015
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Yang, Z. (author)
Corrosion of reinforcing steel is a major culprit to durability and serviceability of concrete structures. This problem is highly relevant for civil engineering structures in the transport sector, such as bridges, tunnels, harbour quays and parking structures. The dominant aggressive external influence is the chloride load from de-icing salts or...
doctoral thesis 2015
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Mendonca Filho, F.F. (author), Pacheo, J. (author), Copuroglu, O. (author)
Energy dispersive X-ray spectrometry (EDS) is a powerful tool for research studies on building materials. Elemental quantification in cementitious phases contained in the concrete microstructure can be performed at an excellent spatial resolution. However, accurate compositional quantification requires a standard-based analysis, whereas...
conference paper 2015
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Pacheco Farias, J. (author)
Reinforcement corrosion is frequently considered as the predominant degradation mechanism affecting reinforced concrete structures. Reinforced concrete structures are commonly subject to harsh environmental and loading conditions in which aggressive species can penetrate. Chlorides, present in seawater or de-icing salts, are the main responsible...
doctoral thesis 2015
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Veerman, R.P. (author), van Breugel, K. (author), Koenders, E.A.B. (author)
Chloride-induced corrosion is a point of big concern in reinforced concrete (RC) structures. To monitor the actual health and to predict the remaining service-life of structures, it is important to understand the structural behaviour and the failure mechanism of structures exposed to chlorides under fatigue loading conditions. A beam test,...
conference paper 2015
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Ferreira, D. (author)
Fiber models for beam and shell elements allow for relatively rapid finite element analysis of concrete structures and structural elements. This project aims at the development of the formulation of such elements and a pilot implementation. Standard nonlinear fiber beam formulations do not account for shear effects and cannot capture all failure...
report 2015
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Grondman, I. (author)
Classical control theory requires a model to be derived for a system, before any control design can take place. This can be a hard, time-consuming process if the system is complex. Moreover, there is no way of escaping modelling errors. As an alternative approach, there is the possibility of having the system learn a controller by itself while...
doctoral thesis 2015
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Slobbe, G. (author)
The design of reinforcement in concrete structures is a complex procedure, often resulting in inefficient designs. One possible solution to improve the design process and create more efficient designs is structural optimisation. This Master’s Thesis focusses on the development of a technique for optimisation of reinforcement in 3D concrete...
master thesis 2015
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Slobbe, A.T. (author)
The crack band approach (in the smeared crack concept) is widely used for the modeling of concrete fracture and is an important analysis technique within advanced engineering. However, the simulations can be impeded by mesh-induced directional bias. Cracks prefer to propagate along continuous mesh lines, which causes a dependency of the...
doctoral thesis 2015
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Van Eck, S.R.G. (author)
As fossil fuel reserves are rapidly being depleted, sustainable alternatives have to be found to fulfil the world's energy demand. Numerous concepts have been proposed to generate electricity by harnessing renewable energy sources such as solar or wind power. One of these concepts is the the so-called solar updraft tower (SUT). The SUT consists...
master thesis 2015
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Veerman, R.P. (author), Koenders, E.A.B. (author)
De-icing salts, used on roads in heavy winters, may enter reinforced concrete (RC) structures via its capillary pore system or via cracks, initiating reinforcement corrosion and reducing its remaining service-life. Vehicles passing real bridges exert a dynamic impact action that might activate a fatigue failure mechanism. In order to generate...
conference paper 2014
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Zorgdrager, A. (author)
master thesis 2014
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Carvalho, P.L. (author), Cruz, P.J.S. (author), Veer, F.A. (author)
A reinforced glass folded structure has been developed using an innovative connection method. The concept relies on extending the reinforcement outwards from the laminated glass and using it to transfer a significant part of the load. The goal is to accomplish a glass element with high stiffness, connected by using a discrete almost invisible...
journal article 2014
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Berendsen, P.P.S. (author)
Material properties of concrete have developed rapidly in the past fifteen years. With the advent of Ultra High Performance Fibre Reinforced Concrete (UHPFRC) a new material has emerged which is; much stronger, stiffer and durable than conventional concrete. Nonetheless despite these promising developments and due the high material costs UHPFRC...
master thesis 2014
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