117,314 research outputs found
Identification and modelling of displacement fields due to slope movements for the vulnerability analysis of historic buildings
No full textABSTRACT: Modelling the influence of deep excavations or tunnelling on the serviceability of existing buildings is a well-known geotechnical engineering problem, while the knowledge and scientific contri-butions referable to the assessment of the damage induced by landslide movements on buildings are lack-ing. The present study concerns the analyses of slope movements, in order to be able to define an intensi-ty parameter useful for the definition of fragility curves for historic buildings subjected to slow slope movements. For this purpose, several numerical analyses have been carried out to assess the pattern of displacement in slope under free-field conditions, as the geometric and geotechnical characteristics of the slope vary. These variations are associated with the relative global slope safety factors, which be-come the reference intensity parameter in the analyses. The results have been obtained in terms of verti-cal and horizontal strains in different sections of interest along the slope, which have been related to the relevant safety factor
Investigation on the damages induced by slope movements on historic buildings: the case of San Nicolò di Capodimonte church in Liguria
No full textABSTRACT: Italy has more cultural heritage to preserve than any other country on earth and, unfortunately, it is ex-posed to several nature hazards that pose in a serious risk historical buildings located in critical areas. A specific research is underway with the aim of proposing a methodology to analyze the effects and damage induced by slope movements on historic buildings and churches. In this context, some case histories have been selected. The case study proposed in the paper is the Romanic church of S.Nicolò di Capodimonte located on the Portofino promontory (Liguria), which vulnerability is particularly increased by its loca-tion, as demonstrated by existing crack patterns presently under monitoring. After data collection, several numerical analyses were performed, changing hazard scenarios. The results have been compared with the damage in the church, allowing the interpretation of the crack pattern according to the direction of movement. Finally, an assessment of the damage level has been performed, which shows the critical con-text for the monument under investigation
Prediction of Slope Movement Effects on Churches for the Development of a Fragility Curve Approach
No full textProtecting cultural heritage from soil interaction related threats is a current and social issue to which scientific research must offer a contribution, considering also the fragility of the exposed territory. Among the related problems, the aim of this research is to develop fragility curves for churches located in landslide areas, in order to establish a reliable forecasting method applicable to intervention management. The choice of selecting churches as exposed structures makes the theme more challenging for their structural and geometric complexities. To generate the curves, exposed elements and damage severity levels have to be identified, through the definition of an intensity parameter of the landslide effects. The intensity parameter is represented by the global slope safety factor, in order to provide a simple tool to use in engineering practice. Vertical and horizontal slope movements, obtained by numerical analyses, can be related to the relevant safety factors as well as to possible permitted damage levels. The paper reports the proposed methodology applied to a case study, in order to validate the hypothesis of the choice of the safety factor as an appropriate index of intensity
A Geotechnical Analysis to Assess the Effect of Slow-Moving Landslides on Historic Masonry Churches
No full textThe protection of cultural heritage from water-soil interaction related threats is a crucial challenge for the scientific community. Among the hazards threatening heritage buildings, slow-moving landslides have been recently found to produce significant damage to historic masonry churches. However, assessing the effects of these phenomena is very challenging, as detailed information about slow-moving landslide movements is not generally available. To tackle this problem, geotechnical analyses can be performed, which enable the landslide-induced soil displacement profiles to be predicted. In view of this, this paper investigates the effects of slow-moving landslides on historic masonry churches by performing geotechnical analyses on two case studies located in the Liguria region (Italy). For each case study, limit equilibrium (LE) and finite element (FE) analyses were carried out with reference to representative sections of the slope on which the building was located. Different scenarios of water table levels were also simulated to evaluate a potential evolution of the slope stability conditions towards failure. Finally, the damage level of the building under study was assessed through a damage criterion available in the literature and compared with the severity of the damage observed on site
Damage Assessment of Historic Masonry Churches Exposed to Slow-moving Landslides
No full textThis paper presents a first contribution to the damage assessment of historic masonry churches exposed to slow-moving landslides. No studies have ever been devoted to systematically investigating the effects of slow-moving landslides on this type of structures. In this work, a damage survey campaign was performed on 33 listed churches located in landslides-affected areas in the Liguria region (Italy). For each church, information regarding zoning, state of activity and estimate direction of landslide phenomena was collected and analysed. A suitable knowledge of the main geometric and structural features as well as of history and past interventions was achieved for each building by means of on-site surveys and archival research. A detailed field-survey of crack patterns and deformations was also performed. The critical assessment of the damage observed allowed to put forward some original remarks on the structural response of historic masonry churches to slow-moving landslides. Furthermore, some recurrent types of damage and damage mechanisms were identified for the first time
Effect of Slow-Moving Landslides on Churches in the Liguria Region: a Geotechnical Approach
No full textProtecting cultural heritage from water-soil interaction related threats is a current
issue and the prediction of the effects induced on buildings by landslides is very challenging.
The main difficulties lie in the lack of detailed information about landside movements as well
as in the modeling of soil-structure interaction. This paper study the effects of a particular
category of slow-moving landslides, namely active rotational and translational slides with
movement rates of the order of some mm/year, on buildings of historical and cultural interest
such as churches. Three case studies located in the Liguria region (Italy) were analyzed by
performing FEM and LEM numerical analyses on sections representative of the slope
Slow-Moving Landslide Damage Assessment of Historic Masonry Churches: Some Case-Studies in Italy
No full textThis paper presents a contribution for the damage assessment of historic masonry churches exposed to slow-moving landslides. In particular, the authors identified four global damage mechanisms, which are presented here by means of the critical damage assessment of four case studies located in the Liguria region (Italy) in areas affected by slow-moving landslides. For each church, a correlation between the damage patterns observed on-site and the ground movements induced by landslide phenomena was sought by means of visual inspections and crack interpretation. As a result, each damage mechanism was associated to a different pattern of ground movements produced by slow-moving landslides
Historic masonry churches exposed to slow-moving landslides: A critical damage assessment
No full textThis paper deals with the damage assessment of historic masonry churches exposed to slow-moving landslides. A damage survey campaign was carried out on 33 listed churches located in the Liguria region (Italy) in areas affected by slow-moving landslides. For each church, information about zoning, state of activity and direction of landslide phenomena was collected and analyzed. Knowledge of each building’s main geometric and structural features, history and past interventions was gained by means on-site surveys and archival research. A detailed field-survey of crack patterns and deformations was also performed. Based on the critical assessment of the damage observed, preliminary conclusions on the structural response of historic masonry churches to slow-moving landslides were made. Recurrent types of damage and damage mechanisms were also identified
Determination of a redox compensation index and its relationships to glycaemic control in type 2 diabetes mellitus
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