12th International Conference on Structural Analysis of Historical Constructions最新文献

{"title":"Structural Evaluation and Maintenance of Brooks Aqueduct Historic Site","authors":"A. Rouhi, N. Shrive","doi":"10.23967/sahc.2021.262","DOIUrl":"https://doi.org/10.23967/sahc.2021.262","url":null,"abstract":"Brooks Aqueduct in Alberta, Canada is one of the largest and most sophisticated reinforced concrete aqueducts in the world. Now a national historic site, Brooks Aqueduct was built in 1914. The structure suffers from cracking and degradation in certain locations. To find out the possible main causes of potential overstress and damage in the different areas of the structure, it was evaluated by site inspections, some laboratory tests and analyzed numerically using Abaqus finite element software. Results of the numerical analysis are compared with the inspection and testing results and conclusions are made about the causes of deterioration and ways to conserve and repair the structure.","PeriodicalId":176260,"journal":{"name":"12th International Conference on Structural Analysis of Historical Constructions","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123178265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Slow-Moving Landslide Damage Assessment of Historic Masonry Churches: Some Case-Studies in Italy","authors":"C. Ferrero, L. Cambiaggi, A. Fenialdi, P. Roca, R. Vecchiattini, C. Calderini","doi":"10.23967/sahc.2021.248","DOIUrl":"https://doi.org/10.23967/sahc.2021.248","url":null,"abstract":"Over the world cultural heritage is exposed to several natural and anthropic hazards such as earthquakes, floods, landslides, subsidence and many others. Decades of studies and observations on site showed the high vulnerability of historic masonry churches to seismic actions [1] and allowed for the identification of their most recurrent earthquake-induced damage and collapse mechanisms. Conversely, the vulnerability of these structures to slow-moving landslides as well as the effects that these phenomena may produce have never been deeply investigated by the scientific community. For these reasons, starting from the observation of some case studies, this work aims at analyzing the damage mechanisms induced in churches by slow-moving landslides. The churches under consideration are located in the Liguria region, Italy. Firstly, for each church information regarding both the landslide-affected area and the geological soil configuration was collected and analyzed in order to identify the state of activity, type and direction of the landslide movement. The availability of interferometric data, in-situ soil tests as well as inclinometers or piezometers installed in the surrounding area was also verified. Furthermore, an archival research was performed aimed to gather information regarding history, geometry, structural arrangement and past alterations, which are essential to better understand the structural behavior of each building [2]. Secondly, inspections on site were carried out and the damage patterns and distortions for all the structural elements (i.e. floor, walls, arches and vaults) were surveyed in detail. An inspection of the surroundings was also performed in order to detect any potential evidence of the presence of soil movements. Finally, a detailed analysis of the damage observed in the churches was performed with the aim of attributing cracks patterns and distortions to specific soil movements produced by slow-moving landslides. Despite an accurate prediction of the displacement profiles induced by the landslides was not available, cracks patterns were good indicators of the direction of soil movements [3]. As a result, some recurrent damage mechanisms that could be associated with slow-moving landslide phenomena were identified. In conclusion, based on the observation of some case studies, this work provides a first preliminary assessment of the damage experienced by churches subjected to slow-moving landslides.","PeriodicalId":176260,"journal":{"name":"12th International Conference on Structural Analysis of Historical Constructions","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123549255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The State and Condition of Historical Buildings Located on Partisan Hill in Wroclaw","authors":"A. Hoła, J. Hola, Ł. Sadowski, J. Szymanowski","doi":"10.23967/sahc.2021.299","DOIUrl":"https://doi.org/10.23967/sahc.2021.299","url":null,"abstract":"The paper presents fragments of original archival documentation, which are used to identify the historical outline of the colonnade building and the peristyle pavilion located on Partisan Hill in an old part of Wroclaw. Traces of these buildings date back to the Middle Ages. The state of preservation of these objects was presented on the basis of conducted assessments, drilling cores, and non-destructive and semi-non-destructive tests. Much attention was devoted to the brick walls, brick and reinforced concrete ceilings in flat roofs, as well as to the elements of architectural detail. The presented results include tests of the moisture content and salinity of walls, tests of the compressive strength of concrete and distribution of reinforcement in ceilings. They constitute the first stage of activities that aim to restore the buildings to their former glory.","PeriodicalId":176260,"journal":{"name":"12th International Conference on Structural Analysis of Historical Constructions","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122158441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Automated Model Updating of a Masonry Historical Church Based on Operational Modal Analysis: the Case Study of San Giovanni in Macerata","authors":"Silvia Santini, C. Baggio, Enrico DA Gai, V. Sabbatini, C. Sebastiani","doi":"10.23967/sahc.2021.038","DOIUrl":"https://doi.org/10.23967/sahc.2021.038","url":null,"abstract":". Over the past few decades, the conservation and seismic assessment of historical buildings has gained great importance. In particular, the prediction of the dynamic response of masonry constructions plays a central role in retrofitting and conservation interventions. Finite element modelling has become the most common and accessible approach to study the behavior of complex masonry structures, however, the gap between numerical and experimental analysis may lead to erroneous results. This work describes the model updating procedure applied to the finite element model of San Giovanni’s church in Macerata, condemned in October 2016 after the Central Italy Earthquake. The laboratory of Proof and Research on Structures and Materials of Roma Tre University carried out an extensive in-situ testing campaign including geometric survey, video endoscopy, flat-jack test, sonic tomography and ambient vibrations test in order to investigate the state of the building. The work involved both numerical and experimental analysis: the results of the testing campaign were interpreted and correlated with an accurate finite element model developed with the software Midas Gen. Operational modal analysis was performed in order to extract the modal parameters of the building (modal frequencies, shape vectors and modal damping). Material characteristics and boundary conditions were updated according to the Douglas-Reid method. In the end, the final model was compared to the initial model to evaluate and discuss the process.","PeriodicalId":176260,"journal":{"name":"12th International Conference on Structural Analysis of Historical Constructions","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121566261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Static Analysis of a Masonry Arched and Buttressed Retaining Wall","authors":"Defne Dogu, C. Molins, N. Makoond","doi":"10.23967/sahc.2021.252","DOIUrl":"https://doi.org/10.23967/sahc.2021.252","url":null,"abstract":": The wall of Casa Salvans is a masonry arched and buttressed retaining wall which was built in 1909 and located in Terrassa, Catalonia. It contains a series of 11 arches of unique shapes, dimensions and inclinations that are supported on buttresses. Despite being a common retaining wall typology, it can be very challenging to assess the stability of such structures given the variability of their geometry. As such, a systematic methodology for the stability assessment of such walls was developed and applied to the case of the wall of Casa Salvans. Self-produced photogrammetry survey enabled creating accurate three-dimensional models of the front of the wall that were later combined with available information from a topographic survey to build cross sections of the wall for analysis. Modern retaining wall design principles evaluating the stability against overturning and sliding were used to assess the condition of the wall. As a consequence of the uncertainties related to the soil parameters and buried elements of the wall, the stability factors could not comply with modern design criterion. Some parametric analyses were carried out on the shear strength parameters of the backfill, revealing that slight increases in the soil internal friction and wall friction angles enhance the stability factors significantly. Since reasonable soil internal and wall friction angles justifying the stability of the wall were obtained, carrying out a geotechnical survey to determine the actual values was recommended. The in-plane stability","PeriodicalId":176260,"journal":{"name":"12th International Conference on Structural Analysis of Historical Constructions","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122680173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Seismic Assessment and Strengthening Interventions of Atop Single-Block Rocking Elements in Monumental Buildings: the Case Study of the San Felice sul Panaro Fortress","authors":"S. Abbati, S. Cattari, S. Lagomarsino, D. Ottonelli","doi":"10.23967/sahc.2021.220","DOIUrl":"https://doi.org/10.23967/sahc.2021.220","url":null,"abstract":"","PeriodicalId":176260,"journal":{"name":"12th International Conference on Structural Analysis of Historical Constructions","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124302313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interdisciplinary Assessment, Analysis and Diagnosis of a Historic Timber Roof Structure From the 20th Century","authors":"B. Isopescu, A. Keller, V. Stoian, M. Mosoarca","doi":"10.23967/sahc.2021.138","DOIUrl":"https://doi.org/10.23967/sahc.2021.138","url":null,"abstract":". Historic roof structures are complex systems which cannot be assessed individually but need a more holistic approach, in order to understand them as a whole. The great variety of contexts in which the building and its roof were placed, of architectural styles which ultimately influence the shape of the roof but also the diversity of technical solutions used by the craftsman to respond to these needs and its state of conservation, make a multidisciplinary approach necessary. While 18th and 19th century roof structures from Timisoara, a city from the western part of Romania, proved out to be complex structures which a high value from urban planning, architectural, symbolical and structural point of view, the 20th century is a period of transition with a wide array of influences, mix of styles and technological improvement of the structures. Therefore, based on the roof structure of the Löffler Palace, built between 1912 -1913, placed in the historic centre of the city, the paper tries to highlight that roof structures from this period are also far more than structural systems. Based on a thorough historical analysis and visual inspection of the structure, by using a multidisciplinary assessment procedure [1], the paper shows that 20th century roof structures are closely related to the building they belong, to their context and have a significant philosophical/symbolic and aesthetical value. At the same time, the procedure also addresses the role of assessment, diagnosis, conservation and maintenance, the","PeriodicalId":176260,"journal":{"name":"12th International Conference on Structural Analysis of Historical Constructions","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130072688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization of FRCM- and FRP-Masonry Bond Behavior","authors":"C. Gentilini, C. Carloni, R. Santoro, E. Franzoni","doi":"10.23967/sahc.2021.045","DOIUrl":"https://doi.org/10.23967/sahc.2021.045","url":null,"abstract":". Composites made of fibers embedded in organic or inorganic matrices are efficient systems for reinforcing historical masonry structures to provide strength and ductility with a negligible mass increment. As it is well known, the structural performance of the composites mainly relies on their adhesion to the substrate. There are different methods to test the adhesion of the composite to the substrate: in laboratory direct shear test is the most commonly employed, while on-site the bond between the reinforcement and the substrate is checked by the pull-off test. In this paper, the adhesion of different composites to the same substrate made of fired-clay bricks is investigated by both the shear test and the pull-off test to qualitatively assess the difference in the two methods. Additionally, to investigate whether the bond is affected by the presence of water in the pores, half of the specimens were tested in water saturated conditions. Three different types of matrix (based on epoxy resin, natural hydraulic lime and Portland cement) were used for the composite matrix, without changing the geometry, the type of masonry substrate and the fibers (galvanized steel cords)","PeriodicalId":176260,"journal":{"name":"12th International Conference on Structural Analysis of Historical Constructions","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129427550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Influence of the Passive Earth Pressure and other Factors on the Stability of the Underground Masonry Vaults of the Paris Metro","authors":"O. Regan, E. Bourgeois, J. Douroux, A. Desbordes","doi":"10.23967/sahc.2021.289","DOIUrl":"https://doi.org/10.23967/sahc.2021.289","url":null,"abstract":". This paper presents an analysis of the behavior of masonry tunnel vaults of the Paris metro when their state of equilibrium is altered. These tunnels were built with a masonry vault combined with sidewalls and a slab made of unreinforced concrete. The main case studied here is that of the spreading of the vault’s supports as a result of nearby construction works. Numerical computations are carried out using a specifically developed model for the masonry that combines a homogenization technique with damage models. An interface between the tunnel and the ground allows the study of the soil-structure interaction. The proposed model identifies the possible hinging failure mechanisms and their configuration based on the horizontal displacements and the geometry of the structure. Several other simpler constitutive laws for the masonry are also used and then compared with the proposed model. An analysis on the loss of the passive earth pressure and the deformation of the structure are also provided. Based on the numerical simulations made and real measurements, it was observed that the studied underground masonry vaults may withstand several","PeriodicalId":176260,"journal":{"name":"12th International Conference on Structural Analysis of Historical Constructions","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129476790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Combined Shear-Flexural Verification of in Plane Loaded Reinforced and Unreinforced Masonry Walls","authors":"A. Benedetti, M. Tarozzi, L. Benedetti","doi":"10.23967/sahc.2021.050","DOIUrl":"https://doi.org/10.23967/sahc.2021.050","url":null,"abstract":". The safety verification of in-plane loaded masonry panels requires the evaluation of at least three different collapse conditions connected with overturning, shear sliding, and shear – compression failure at the panels’ toe. In reinforced panels , the resisting models should even take into consideration the presence of localized or distributed reinforcement. In general, the masonry is considered a Mohr-Coulomb type material not resisting tension and plastic in compression, while reinforcement is a brittle elastic material resisting tensile forces only [1]. The ultimate limit state is however linked with a given subset of compressed material inside the panel area. The compressed sections are therefore varying inside the panel as a function of the applied load. The collapse occurs in shear or overturning when one peculiar compressed section reduces to its minimum [2].","PeriodicalId":176260,"journal":{"name":"12th International Conference on Structural Analysis of Historical Constructions","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129834567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}