Searched for: faculty%3A%22Civil%255C%252BEngineering%255C%252Band%255C%252BGeosciences%22
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Shionaga, R. (author), Pansuk, W. (author), Grunewald, S. (author), den Uijl, J.A. (author), Walraven, J.C. (author)
The synergistic action of a cementitious matrix and fibres can result in strain hardening in tension. The accompanied tensile strain capacity can be an important design parameter for strain-hardening cementitious composites in order to prevent the localization in a single crack and to assure that the stress is at least the tensile strength o f...
conference paper 2014
document
Blagojevic, A. (author), Koleva, D.A. (author), Walraven, J.C. (author)
This work reports on the investigation of steel corrosion behavior in 1000 mm in length reinforced concrete beams under sustained load, aiming to define a feasible experimental protocol for corrosion monitoring. The beams were subjected to wetting (5% NaCl for corroding cases and tap water for control ones) and drying cycles. Generally applied...
conference paper 2014
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Amir, S. (author), Van der Veen, C. (author), Walraven, J.C. (author), De Boer, A. (author)
The research subject of this paper is the bearing capacity of transversely prestressed concrete bridge decks between concrete girders under concentrated loads. Experiments on a 1:2 scale model of this bridge were carried out in the laboratory and a 3D nonlinear finite element model was developed in the FEA software package DIANA to study the...
conference paper 2014
document
Blagojevic, A. (author), Koleva, D.A. (author), Walraven, J.C. (author)
Chloride-induced corrosion of steel reinforcement is one of the major threats to durability of reinforced concrete structures in aggressive environmental conditions. When the steel reinforcement starts to corrode, structures gradually lose integrity and service life is shortened. Cracks are inevitable in practice and they facilitate ingress of...
conference paper 2014
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Amir, S. (author), Van der Veen, C. (author), Walraven, J.C. (author), De Boer, A. (author)
In the Netherlands, most of the bridges were built more than 50 years ago and it is essential for designers to find out if these bridges are safe for modern traffic especially in shear since that was not considered in design recommendations before 1976. Detailed experiments have been carried out in the laboratory to investigate punching shear...
conference paper 2014
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Lantsoght, E.O.L. (author), De Boer, A. (author), Van der Veen, C. (author), Walraven, J.C. (author)
conference paper 2014
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Grunewald, S. (author), Shionaga, R. (author), Walraven, J.C. (author)
Floor panels produced with traditionally vibrated concrete are relatively thick due to the need to reinforce concrete and consequently, heavy. Without the need to place rebars in panels and by applying self-compacting fibre reinforced concrete (SCFRC) the production process becomes more efficient. Fibres improve the performance of concrete by...
conference paper 2013
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Ter Maten, R.N. (author), Grunewald, S. (author), Walraven, J.C. (author)
Ultra-High Performance Fibre-Reinforced Concrete (UHPFRC) is an innovative concrete type with a high compressive strength and a far more durable character compared to conventional concrete. UHPFRC can be applied in structures with aesthetic appearance and high material efficiency. Shell structures are spatially curved surface structures of which...
conference paper 2013
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Lantsoght, E.O.L. (author), Van der Veen, C. (author), Walraven, J.C. (author), De Boer, A. (author)
The combination of increased live loads and a more conservative shear capacity in the recently implemented Eurocodes, resulted in a large number of existing solid slab bridges in the Netherlands being shear-critical upon assessment. However, an enhancement of the shear capacity can occur in slabs under concentrated wheel loads due to transverse...
conference paper 2013
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Lottman, B.B.G. (author), Koenders, E.A.B. (author), Blom, C.B.M. (author), Walraven, J.C. (author)
In this paper results are presented from a by STW funded research project “spalling of concrete due to fire exposure” between Eindhoven University of Technology and Delft University of Technology and aimed at developing an integral spalling model. In this paper two coupled Finite Element based models are presented in which the first model...
conference paper 2013
document
Lantsoght, E.O.L. (author), Van der Veen, C. (author), Walraven, J.C. (author)
A large number of existing reinforced concrete slab bridges are found to be insufficient for shear when calculated according to the governing codes. Seeking improved methods, for example, based on new experimental evidence, to assess the residual shear capacity and prolonging their service life can avoid large economic, environmental and social...
conference paper 2013
document
Lantsoght, E.O.L. (author), Van der Veen, C. (author), Walraven, J.C. (author), De Boer, A. (author)
The capacity of reinforced concrete solid slab bridges in shear is assessed by comparing the design beam shear resistance to the design value of the applied shear force due to the permanent actions and live loads. Results from experiments on half-scale continuous slab bridges are used to develop a set of recommendations for the assessment of...
conference paper 2013
document
Sarkhosh, R. (author), Walraven, J.C. (author), Den Uijl, J.A. (author), Braam, C.R. (author)
Long-term tests on large-scale concrete beams without shear reinforcement, which are tested for more than two years under sustained loading close to the ultimate shear capacity (load ratio ranging from 87% to 95%) under climate controlled condition, show that sustained loading has no significant effect on the shear capacity. Although many...
conference paper 2013
document
Lantsoght, E.O.L. (author), Van der Veen, C. (author), Walraven, J.C. (author)
Previous experimental research at Delft University of Technology indicated an increased shear capacity of slabs under concentrated loads as a function of decreasing distance to the adjacent line support. Expressions have been derived for this increase, including the definition of an appropriate effective width. However, it is unknown if the...
conference paper 2013
document
Lantsoght, E.O.L. (author), Van der Veen, C. (author), Walraven, J.C. (author)
Existing solid slab bridges under a combination of wheel loads and distributed traffic loads sometimes do not fulfil the code requirements for shear. However, reinforced concrete slabs loaded close to the support are subjected to shear stresses which might result in a failure mode of combined punching and shear. This behaviour is studied in a...
conference paper 2013
document
Sarkhosh, R. (author), Walraven, J.C. (author), Den Uijl, J.A. (author)
Under sustained loading, the propagation of cracks in concrete is assumed to be related to the elastic deformation, material parameters and time. Based on the fictitious crack model (FCM), a finite element method is proposed to explain the behavior of cracks in time using current constitutive relations to approximate the time-dependent crack...
conference paper 2013
document
Blagojevic, A. (author), Fennis-Huijben, S.A.A.M. (author), Walraven, J.C. (author)
conference paper 2012
document
Fennis-Huijben, S.A.A.M. (author), Grunewald, S. (author), Walraven, J.C. (author), Den Uijl, J.A. (author)
Optimizing concrete mixtures with regard to cement content is one of the most important solutions in sustainable concrete design. Workability o f these low cement content or ecological mixtures is very important. Eleven mortar mixtures are presented, which show how a higher packing density can be used to obtain mixtures that require less water....
conference paper 2012
document
Amir, S. (author), Van der Veen, C. (author), Walraven, J.C. (author)
In the Netherlands, there is a need to determine the capacity of bridge decks as a large number of them were built back in the 60’s and 70’s. Since then, not only a lot of additional safety requirements have been incorporated into the modern codes but the traffic flow has also increased drastically. The current research deals with this question...
conference paper 2012
document
Grünewald, S. (author), Janssen, B. (author), Schipper, H.R. (author), Vollers, K.J. (author), Walraven, J.C. (author)
This paper discusses the effect of intentional deformation of a flexible formwork after casting of the concrete and the influence of the characteristics of concrete in the fresh state on the quality of a concrete element. This deformation is intended to bring the concrete element in its desired final shape; the deformation typically takes place...
conference paper 2012
Searched for: faculty%3A%22Civil%255C%252BEngineering%255C%252Band%255C%252BGeosciences%22
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