Revitalisation of the ruins of the Abbey-Tower at Sint-Truiden

status: publishe

Overzicht en revalorisatie van holle vloersystemen uit het Interbellum

Door de nieuwe technische mogelijkheden en materiaalontwikkelingen kwamen er eind 19e en begin 20e eeuw verschillende modulaire vloersystemen op de markt waardoor op eenvoudige wijze lichte, maar toch draagkrachtige vloeroverspanningen konden gerealiseerd worden. De paper geeft een overzicht van de evolutie in vloersystemen en geeft een uniek toepassingsvoorbeeld met specifieke problematiek en revalorisatieaanpak.status: publishe

Consolidation and strengthening of historical masonry: Modeling structural behaviour of grouted three-leaf masonry

Development of mineral grouts for consolidation and strengthening of historical masonry was discussed in Ref. [1]. The properties of the injection grout must counteract the elements that initiate the failure mechanism of multiple leaf historical masonry and lead to its collapse. This paper presents a macro-approach to model the structural behavior of three-leaf masonry. A global approach is used, based on the properties and the behavior of the external leafs, in combination with the properties and behavior of the central core of the threeleaf wall. Evaluation of the models is made by comparison with experimental data.status: publishe

Consolidation and strengthening of historical masonry by means of mineral grouts: Grout Development

Mass consolidation of stone and brick masonry is considered, with exclusion of pure crack repair. Damage and specific failure mechanisms in multiple leaf masonry are presented. The aims of consolidation are explained, and the inherent advantages and disadvantages of distinct strengthening and consolidation techniques are given. An historical overview of consolidation methods and of development of consolidation grout materials is given, which explains how technology evolved to the actual procedures.status: publishe

Standzekerheidsproblemen bij oude funderingssystemen, deel 2

edition: afl.status: publishe

Application of probabilistic concepts in evaluation and strengthening of constructions

When assessing the remaining load bearing capacity of existing structures, it is of outmost importance to have an optimal estimate of the remaining strength of the structural materials used. In this paper, the added value of a statistical analysis of in site data is demonstrated based on 2 case studies: the ‘s Hertogenmolens Watermill (B) and the Vuurmolen (1902) at Overijse (B), a former steam mill. Both buildings are listed as historical monument. The first structure mainly consists of brick masonry, the latter building is one of the first reinforced concrete buildings erected in Belgium (1902). In both cases, the load bearing capacity and thus the remaining structural safety was one of the main issues in the global restoration of the monuments. To obtain a good estimate of the strength of the structure, in site data are gathered. In both cases this is done with a mix of destructive and non-destructive tests. These data are processed statistically. From that, an estimated probability density function for the materials’ resistance is obtained. The effects of this estimate on the structural evaluation and necessity of a strengthening are outlined. The effects of oversimplification in the statistical processing and mismatching the type of probability density function on the structural safety are illustrated as well.status: publishe

Standzekerheidsproblemen bij oude funderingssystemen, deel 1

edition: afl.status: publishe

Church of Saint-James at leuven (B) - Structural Assessment and Consolidation Measures

The construction of the church dates back from 1220. During several subsequent building phases, the wooden roofs in the central and side naves were replaced with masonry vaults, and flying buttresses were added. The structure itself is located on a former swamp, resulting in large differential settlements. In the past, restoration works took place. However, due to the excessive cracks observed, it was decided in 1963 to close the church for service, to remove the severely cracked masonry vaults of the side naves and to shore up the pillars of the main nave. Additionally, in 2000, the remaining flying buttresses were removed and replaced by tie-rods. The focus of this paper is on the structural understanding of this historical building, to determine the most appropriate strengthening and consolidation measures, respecting the au-thenticity of the building and preserving it for the future.status: publishe