Searched for: author%3A%22Ravenshorst%2C+G.J.P.%22
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Mirra, M. (author), Pagella, G. (author), Gard, W.F. (author), Ravenshorst, G.J.P. (author), van de Kuilen, J.W.G. (author)
In the historic city centre of Amsterdam (NL), the most widespread foundation system consists of wooden piles. With the aim of modelling and predicting remaining service life of these foundations and the piles in particular, one of the possible methods for collecting data and monitoring their condition consists of micro-drilling (MD)...
conference paper 2023
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Pagella, G. (author), Mirra, M. (author), Ravenshorst, G.J.P. (author), van de Kuilen, J.W.G. (author)
This work investigated the influence of knots on the compression strength of wooden foundation piles. The study involved 110 pile segments sawn from 18 spruce and 9 pine piles with a mean diameter of approximately 200 mm, and moisture contents above fiber saturation. The mechanical properties were determined performing both full-scale...
conference paper 2023
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Mirra, M. (author), Ravenshorst, G.J.P. (author)
The region of Groningen (NL) has experienced increasing human-induced seismicity caused by gas extraction in the last decades. The local building stock, not designed for seismic loads, consists for more than 50% of unreinforced masonry buildings with timber diaphragms. In this context, a detailed seismic characterization of timber and masonry...
conference paper 2023
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Ravenshorst, G.J.P. (author), van Dalen, J.H. (author), Mirra, M. (author), Steiger, René (author), van de Kuilen, J.W.G. (author)
In this work, the relationship for a socket-type connection in wooden foundation piles is investigated, and a trilinear moment-rotation diagram was determined by means of experiment.<br/>Numerical and analytical models confirmed that the material properties for compression perpendicular to the grain are governing for the connections’ strength...
conference paper 2021
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van de Kuilen, J.W.G. (author), Beketova-Hummel, O. (author), Pagella, G. (author), Ravenshorst, G.J.P. (author), Gard, W.F. (author)
Timber pile foundations are widespread in many areas around Europe and North-America. Especially in areas with weak soils, timber pile foundations have been a very good and economic solution. However, aging of the foundations can become a problem, as physical, biological and/or chemical degradation may occur over time. Now, that foundations...
conference paper 2021
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Ravenshorst, G.J.P. (author), Gijzen, Richard (author), Willebrands, Okke (author), Slooten, Elgar (author), van de Kuilen, J.W.G. (author)
Tall timber buildings are of growing interest worldwide and also in the Netherlands. With the introduction of CLT, higher timber buildings are possible compared to traditional timber frame housing. Tall timber buildings can be made as modular buildings or as buildings with a CLT or concrete core and a timber wall/column-floor system that can...
conference paper 2021
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Mirra, M. (author), Ravenshorst, G.J.P. (author), van de Kuilen, J.W.G. (author)
Historical or existing buildings are often composed of brick or stone masonry walls, and timber floors and roofs. When these buildings are subjected to earthquakes, the interaction among such structural components is essential to avoid collapse or excessive damage to the constructions. In this framework, a crucial role is played by the...
conference paper 2021
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Mirra, M. (author), Sousamli, M. (author), Longo, M. (author), Ravenshorst, G.J.P. (author)
In the region of Groningen (NL), human-induced earthquakes initiated by gas extraction are causing structural damage. In that area, the building stock is mainly composed of unrein- forced masonry (URM) buildings with light and flexible timber floors and roofs. Thus, an ex- perimental campaign was arranged for assessing the in-plane response of...
conference paper 2021
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Mirra, M. (author), Ravenshorst, G.J.P. (author), van de Kuilen, J.W.G. (author)
In the field of seismic retrofitting, a common intervention to improve box-like behaviour in an existing building is the strengthening and stiffening of existing timber floors and roofs. However, these retrofitting methods should be carefully applied, because they change the static scheme and the buildings' response to earthquakes....
conference paper 2021
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Ravenshorst, G.J.P. (author), Gard, W.F. (author), van de Kuilen, J.W.G. (author)
The main parameter that influences the bending strength of timber from tropical hardwood is the slope of grain. Although in the grading rules a specific threshold value is given, in these hardwoods the global slope of grain is very difficult to quantify by a visual assessment. The slope of grain measured after testing gives a better indication,...
conference paper 2019
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Esposito, R. (author), Jafari, S. (author), Ravenshorst, G.J.P. (author), Schipper, H.R. (author), Rots, J.G. (author)
In recent years induced seismicity in the Netherlands considerably increased. This phenomenon has a wide impact on the built environment, which is mainly composed by unreinforced masonry (URM) structures. These buildings were not designed for seismic loading, and present peculiar characteristics include very slender walls (100 mm thickness and 2...
conference paper 2018
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Messali, F. (author), Esposito, R. (author), Jafari, S. (author), Ravenshorst, G.J.P. (author), Korswagen, Paul A. (author), Rots, J.G. (author)
In recent years, induced seismicity in the north of the Netherlands significantly increased. As a consequence, the seismic assessment of the built environment, which mainly consists of unreinforced masonry (URM) structures not designed for seismic loads, became of high relevance. Within this context, an extensive multiscale testing program has...
conference paper 2018
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van de Kuilen, J.W.G. (author), Ravenshorst, G.J.P. (author)
There are more than 1000 wood species worldwide available that have the potential to be used in structural applications. Many of these species are tropical hardwood species. In this paper, the mechanical and physical properties of a large number of tropical hardwoods are presented. They are investigated for relationships that are valid for all...
conference paper 2018
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Messali, F. (author), Ravenshorst, G.J.P. (author), Esposito, R. (author), Rots, J.G. (author)
The evaluation of the seismic response of unreinforced masonry buildings is a popular topic all over the world. In recent years, also the Netherlands started to face seismic risk, since the induced seismicity in the north of the country considerably increased (the gas extraction started in 1963, and earthquakes have occurred since the early ‘90s...
conference paper 2017
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Esposito, R. (author), Terwel, K.C. (author), Ravenshorst, G.J.P. (author), Schipper, H.R. (author), Messali, F. (author), Rots, J.G. (author)
During the last years, induced seismicity in the northern part of the Netherlands increased and the seismic assessment of unreinforced masonry (URM) structures became an important issue. As the problem is recent, the current building stock is not designed to withstand earthquakes and national guidelines are under development, but currently not...
conference paper 2017
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Ravenshorst, G.J.P. (author), Gamper, N. (author), van de Kuilen, J.W.G. (author), de Vries, P.A. (author)
The current shear strength values for high density tropical hardwoods are very low compared to the values for softwoods, according to European strength class tables. The reason for this is that standardized tests according to European standard EN 408 have not been performed yet for tropical hardwoods. In this...
conference paper 2016
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Crielaard, R. (author), van de Kuilen, J.W.G. (author), Terwel, K.C. (author), Ravenshorst, G.J.P. (author), Steenbakkers, P. (author), Breunesse, A. (author)
Cross-laminated timber, or CLT, is receiving attention for its potential use in tall buildings. As a combustible material, one of the challenges for the construction of these buildings is the fire risk that results from its use in the structure. Unprotected CLT can burn along with the fuel load present in a compartment. Irrespective of its fire...
conference paper 2016
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Ravenshorst, G.J.P. (author), van de Kuilen, J.W.G. (author)
The current methods for the determination of the strength properties for wood species for grading purposes require extensive testing. Species independent grading might be a solution for this problem, in particular for tropical hardwoods. The strength reducing characteristics such as knots and slope of grain...
conference paper 2016
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Van de Kuilen, J.W.G. (author), Otterloo, J. (author), Ravenshorst, G.J.P. (author), De Vries, P. (author)
Wooden mitre gates are used for centuries in waterways and canals. For newly built as well as the renewal of such gates, a number of wood species is used, ranging from oak to dense tropical hardwoods. As mitre gates have high loads to withstand, their strength verification has become more and more important. As strength verification rules for...
conference paper 2014
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