Publicaties
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In-situ U-value-measurements of wood frame roofs: analysis of deviations between measured and design performance Universiteit Gent
The hygrothermal performance of various lightweight sloped roof designs was monitored in the KULeuven VLIET testbuilding for 2 years (Janssens et al. 1998). One of the aims of the investigation was to evaluate whether the design U-value of 0.18 W/m²K was effectively met in practice. For this reason 3 heatflux transducers were installed at the inside surface of each component together with a number of thermocouples at the surfaces of the ...
Hygrothermal behaviour of compact roofs under Belgian climate Universiteit Gent
The use of structural glass as a strengthening strategy for 19th century glass roofs Vrije Universiteit Brussel
The research focuses on nineteenth century glass coverings on an iron frame such as the examples shown on the right. During rehabilitation, the construction needs to be adjusted to meet present-day standards of comfort and safety. Two issues need to be addressed in this process:
- often, the original iron structure is not able to withstand the loads imposed by the building codes;
- the self-weight increases due to the substitution of ...
- often, the original iron structure is not able to withstand the loads imposed by the building codes;
- the self-weight increases due to the substitution of ...
Joining techniques in nineteenth- and early twentieth-century Belgian timber roofs Vrije Universiteit Brussel
An intimate knowledge of joining techniques is crucial for the documentation and restau-ration of old timber structures, yet these assemblies are often overlooked in historical studies or during on-site assessment. To help bridge this gap, this paper provides an overview of the joining techniques used in Belgian timber roof structures during the nineteenth and early twentieth centuries. Based on the author's on-site observations of over 50 ...
Polonceau versus Ardant: efficiency versus aesthetics? Vrije Universiteit Brussel
In 1839 engineer Camille Polonceau invents the Polonceau truss. However, for a long time architects refuse to openly show iron structures in public buildings and construction for aesthetical reasons. This paper deals with the debate on the efficiency and aesthetics of iron architecture in the 19th and 20th century, by means of a structural analysis of the iron Polonceau and Ardant roof trusses of the Brussels model schools. The paper concludes ...
The Ardant truss: a forgotten rival of the well-known Polonceau truss Vrije Universiteit Brussel
In 1839 the engineer Camille Polonceau invented the structurally efficient Polonceau truss. However, for a long time architects refused to leave iron structures exposed in public buildings for aesthetical reasons. Despite this, engineers acknowledged the ample structural opportunities of iron roofs, which urged them to experiment with curved trusses in order to avoid the bar roof trusses so reminiscent of industrial buildings. Nevertheless, ...
Innovations in Ventilation: Wind cowls in the 19th century Vrije Universiteit Brussel
At the beginning of the 19th century, health,hygiene and the wellbeing of dwellers became important. Adequate ventilation was recognized as a key element in a hygienic environment. To ensure sufficient air change rate in large buildings, two main artificial ventilation methods were developed: mechanical ventilation systems, which include fans and ventilators, and heat- and windinduced low-pressure ventilation systems or forced ventilation by ...
Glazed wrought-iron arcades: building technologies and spatial effects Vrije Universiteit Brussel Universiteit Antwerpen
The paper explores the technologies used to build and glaze the roofs of three well known shopping arcades constructed between the 1820s and 1870s: the Galerie d’Orléans in Paris (1828-29), the Royal Saint-Hubert Galleries in Brussels (1845-47), and the Galleria Vittorio Emanuele II in Milan (1865-77). The wrought iron construction and glazing technologies of the three arcades are compared in detail, and the development of the structural systems ...