Searched for: subject:"slabs"
(1 - 20 of 39)

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Pinto Moura, J.P. (author)
Cavity optomechanics studies the interaction between mechanical resonators and optical cavities through radiation pressure forces and aims to harness this interaction for applications in the areas of high precision metrology, tests of fundamental quantum mechanics, or quantum information processing. For the most ambitious of these applications...
doctoral thesis 2019
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Abspoel, R. (author), Stark, J.W.B. (author), Prins, H.-J. (author)
Composite slabs are designed to transfer loads in one direction e.g. the longitudinal direction of the ribs. To reduce the deflection, it is useful to realise a continuous slab with at least one intermediate support. At the intermediate support in addition to a hogging bending moment a rather large vertical shear force will act. For the...
conference paper 2018
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Cavallo, D. (author), Syed, W.H. (author), Neto, A. (author)
In this work we report on the design, manufacturing and testing of a dual-polarized array of connected slots radiating in the presence of an artificial dielectric superstrate. The prototype array consists of 512 elements, i.e. 16×16 connected slots for each of the two polarizations. The antenna array is realized with a single multi...
journal article 2018
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Alexander, S (author), Lantsoght, E.O.L. (author)
The arched strut is an addition to the strut-and-tie (STM) tool kit. It models the combination of disturbed behavior in one direction with slender behavior in the perpendicular direction. Common applications for the arched strut are in the design of connections between a reinforced concrete slab and its supporting columns or punching of bridge...
conference paper 2018
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Lantsoght, E.O.L. (author), van der Veen, C. (author), de Boer, A (author)
The loads that are used for the assessment of existing reinforced concrete slab bridges are the self-weight, superimposed loads, and distributed and concentrated live loads. As such, the shear capacity of reinforced concrete slabs under a combination of distributed and concentrated live loads is a topic of practical relevance. For slabs...
journal article 2017
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Lantsoght, E.O.L. (author), Koekkoek, R.T. (author), Hordijk, D.A. (author), de Boer, A. (author)
Proof load tests of bridges can be very useful for structures with a lack of information, or for structures of which the effect of material degradation is difficult to assess. Contrary to diagnostic load testing, proof load testing is not well-defined in current standards in terms of required load and analysis of measurements. The risk...
journal article 2017
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Lantsoght, E.O.L. (author), de Boer, A. (author), van der Veen, C. (author)
Existing reinforced concrete solid slab bridges in the Netherlands are re-assessed for shear based on a Unity Check: the ratio of the shear stress caused by the applied loads to the shear capacity of the concrete cross-section. The governing shear stress resulting from the self-weight, weight of the wearing surface, distributed and concentrated...
journal article 2017
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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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Cavallo, Daniele (author)
We present an analysis of artificial dielectric layers (ADLs), when a lateral shift between layers is present. The alternate lateral displacement of the layers is an important parameter to engineer the desired effective electromagnetic properties of the ADL material. More specifically, much higher equivalent dielectric constants can be...
conference paper 2017
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Lantsoght, E.O.L. (author), van der Veen, C. (author), Hordijk, D.A. (author), de Boer, A. (author)
As the bridge stock in the Netherlands and Europe is ageing, various methods to analyze existing bridges are being studied. Proof load testing of bridges is an option to experimentally demonstrate that a given bridge can carry the prescribed live loads. Based on extensive research on proof load testing of reinforced concrete slab bridges carried...
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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Lantsoght, E.O.L. (author), van der Veen, C. (author), de Boer, A. (author)
Proof loading of existing bridges is an option to study the capacity when crucial information about the structure is lacking. To define the loading criteria for proof load testing, a review of the literature has been made, finite element models of existing viaducts have been made, and on these viaducts, proof loading tests have been carried out....
conference paper 2017
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Lantsoght, E.O.L. (author), van der Veen, C. (author), de Boer, A. (author)
Most methods for the design and analysis of reinforced concrete slabs for punching are based on experiments on slab-column connections, reflecting the situation in building slabs. Slab-column connections with unbalanced
moments have also been studied in the past. Experiments indicate that the accuracy of models for asymmetrically loaded...
conference paper 2017
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Sanudo, R(extern) (author), Miranda, M. (author), Markine, V.L. (author), Dell'olio, L. (author)
Different types of track infrastructure can be found along railway lines. Separation zones between these different types of structures are the source of a lot of problems. Transition zones on a railway line represent a gradual solution for the problems between conventional railway structure and singular structures located at different points...
journal article 2016
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Magan, Christopher (author), Coenders, J.L. (author), Huijben, F (author), Nijsse, R. (author), van der Horst, A.Q.C. (author)
This paper presents a design for a topology-optimised concrete floor slab, of which the structural optimisation process is guided by manufacturability constraints from a vacuumatic formwork. Ihe design has been obtained using an open-source, tliree-dimensional topology optimisation algorithm. Traditional floor systems are cost-optimised but can...
conference paper 2016
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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)
A large number of existing reinforced concrete solid slab bridges in the Netherlands are found to be insufficient for shear upon assessment. However, research has shown additional sources of capacity in slab bridges, increasing their total capacity. Previous testing was limited to half-scale slab specimens cast in the laboratory. To study the...
journal article 2016
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Lantsoght, E.O.L. (author), van der Veen, C. (author), de Boer, A (author), Hordijk, D.A. (author)
In the Netherlands, the shear capacity of a large number of existing reinforced concrete solid slab bridges is subject to discussion, as initial assessments indicated that their capacity was insufficient. In certain cases, the deterministic value of the moment capacity is larger than the deterministic value of the shear capacity. However, when...
journal article 2016
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Lantsoght, E.O.L. (author), van der Veen, C. (author), de Boer, A (author), Hordijk, D.A. (author)
A large number of existing reinforced concrete solid slab bridges in the Netherlands are found to be insufficient for shear upon assessment. However, research has shown additional sources of capacity in slab bridges, increasing their total capacity and possibly changing their failure mode. Previous testing was limited to half-scale slab...
journal article 2016
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Syed, W.H. (author), Cavallo, D. (author), Neto, A. (author)
In this paper, we present an overview of our recent works on artificial dielectric layers (ADLs), used to enhance the radiation efficiency of planar printed antennas and arrays. The artificial material is realized by introducing planar sub-resonant metallic inclusions in a host material. This allows to enhance the permittivity of the host...
conference paper 2016
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Lantsoght, E.O.L. (author), van der Veen, C. (author), Boer, A. de (author)
In August 2014, the Ruytenschildt Bridge, a reinforced concrete solid slab bridge (reinforced with plain bars) in the Friesland province in the Netherlands was tested until failure. One of the goals of proof loading and testing this bridge to failure, was to study the failure mode of existing slab bridges. The combination of smaller shear...
conference paper 2016
Searched for: subject:"slabs"
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