scholarly journals Technical and Structural Problems Related to the Interaction between a Deep Excavation and Adjacent Existing Buildings

2021 ◽  
Vol 11 (2) ◽  
pp. 481
Author(s):  
Grzegorz Dmochowski ◽  
Jerzy Szolomicki
Keyword(s):  
Risk Factors ◽  
Technical Condition ◽  
Historic Buildings ◽  
Structural Elements ◽  
Existing Buildings ◽  
Deep Excavation ◽  
Structural Problems ◽  
Vertical Deformations ◽  
Ground Displacements

Currently, new housing in city centers is more and more often developed on small plots of land, or existing buildings on such plots are rebuilt to such an extent that only their façade walls remain. In both cases, as a rule, a deep excavation is also made, either at the existing object or within its area. Serious damage often occurs because of the carried out work. It is not possible to accurately determine the response of a building to the deformation associated with the excavation due to the variability of many factors that influence it. As a result, the response of the building must be estimated on the basis of constant monitoring and approximate calculations. Depending on the size of the predicted ground displacements and the technical condition of buildings, it is often necessary to protect or strengthen their structural elements. In the paper, the authors analyzed various risk factors for the implementation of infill buildings and the revitalization of historic buildings using only their façade walls. In addition, examples of contemporary solutions for securing the walls of existing buildings, and the method of monitoring vertical deformations using the Hydrostatic Levelling Cell (HLC) system, are presented.

EVALUATION OF INFLUENCE OF MULTISTORY BUILDING UNDER CONSTRUCTION ON EXISTING BEARING-WALL BUILDINGS

2017 ◽  
Vol 7 (1) ◽  
pp. 17-25
Author(s):  
Alexander P. KAZANKOV ◽  
Zinaida F. VASILCHIKOVA ◽  
Pavel V. IGNATYEV
Keyword(s):  
Computational Models ◽  
Technical Condition ◽  
Structural Elements ◽  
Existing Buildings ◽  
Sheet Pile ◽  
Multistory Building ◽  
Calculation Results ◽  
Under Construction ◽  
Prefabricated Houses ◽  
Base Formation

The paper presents the results of a survey of existing buildings and the construction of prefabricated houses - insert to end their mutual infl uence on each other. Based on the data of the survey the technical condition of bearing and enclosing structures of the above objects has been developed computational models to assess the actual bearing capacity of soil foundations and structural elements in areas abutt ing the neighboring buildings. According to the calculation results of the event were off ered to ensure the independent operation of neighboring objects by the apparatus of the sheet pile wall CFA piles. After these measures to prevent cross-contamination of existing and under construction panel inserts homes between them, practically stopped further growth of deposits base formation and development of cracks in the panels and supporting brick walls.

scholarly journals Methodology for inspection of wood pathologie using ultrasonic pulses

CERNE ◽  
2012 ◽  
Vol 18 (3) ◽  
pp. 479-486 ◽  
Author(s):  
Edgar Vladimiro Mantilla Carrasco ◽  
Amanda Rocha Teixeira
Keyword(s):  
Nondestructive Testing ◽  
Historic Buildings ◽  
Structural Elements ◽  
Timber Beam ◽  
Ultrasound Technique ◽  
Glued Laminated Timber ◽  
Overall Stability ◽  
Complementary Techniques ◽  
Wooden Structures

Awareness has been on the rise on the part of society about the importance of wooden structures, in particular historic buildings. This concern is reflected in continued maintenance of historic heritage and has been increasingly leading professionals working in the field of wooden structures to seek improved techniques for inspection of such structures. Methods involving nondestructive testing (NDT) are the most recommended for inspection, as they do not affect the relevant architecture and thus help maintain the integrity and originality of the building. Among the various existing NDT methods, a widespread and promising option is the ultrasound technique. This work introduces a methodology for inspection of wooden structural elements using ultrasonic pulses. The methodology was applied to a glued laminated timber beam with signs of decay on its interior. Ultrasound results helped map the damaged areas of the beam on a plane by using isochromatic patterns. The contribution of this work is a methodology to help investigate wood pathologies which, in combination with other complementary techniques, will allow more accurate and reliable evaluations of wooden structures, avoiding unnecessary replacement of sound structural elements mistakenly presumed to be damaged, or else ensuring maintenance of extremely deteriorated elements that would otherwise compromise the overall stability of the structure.

Probabilistic Analysis of Intermediate Floor Steel and Wooden Structures in the Old Urban Development Building

2014 ◽  
Vol 633-634 ◽  
pp. 1140-1147
Author(s):  
Vladimir Alekseevich Sokolov
Keyword(s):  
Information Theory ◽  
Urban Development ◽  
Probabilistic Analysis ◽  
Technical Condition ◽  
Probabilistic Methods ◽  
Technical Diagnostics ◽  
Structural Elements ◽  
Complex Technical Systems ◽  
Technical Systems ◽  
Wooden Structures

The article suggests an approach to determine structural elements technical condition, based on the mathematical probabilistic apparatus of technical diagnostics. Diagnostics are performed using probabilistic methods of complex technical systems conditions recognition. Probabilistic parameters are calculated according to Bayes’s rule. The paper shows a diagnostics example of intermediate floor elements and systems in the old urban development building. Both the suggested method and information theory methods are used during diagnostics.

Conception and Practical Application of a Measuring Device for Energetic Parameters Measurement of a Mechatronic Object

2011 ◽  
Vol 180 ◽  
pp. 185-193 ◽  
Author(s):  
Aleksy Cwalina ◽  
Marcin Zacharewicz
Keyword(s):  
Synchronous Generator ◽  
Technical Condition ◽  
Measured Quantity ◽  
Structural Elements ◽  
Measuring Device ◽  
Non Invasive ◽  
Invasive Method ◽  
Method Of Evaluation ◽  
Parameters Measurement ◽  
Gas Pressures

In the article assumptions of the developed non-invasive method of evaluation technical condition of selected structural elements of the ship's diesel-electric set at limited monitoring susceptibility, when the engine is not equipped with indicator valves, are discussed. The method is based on simultaneous measurements of phase-to-phase voltage of the synchronous generator, exhaust gas pressures in the exhaust manifold, and vibration accelerations of some parts of the set. To the purpose of the accomplishment all measurements of energetic parameters at the same time, it turned out to be necessary to design and construct the measured quantity converter. In the paper requirements in relation to such a converter, technical project, and representative results of measurements conducted on a real object – diesel-electric set type ZE400/52 – are presented.

scholarly journals Proposta de consolidação estrutural da Igreja de Nossa Senhora do Monte do Recôncavo

2014 ◽  
Vol 4 (3) ◽  
pp. 228-236
Author(s):  
M. Oliveira ◽  
R. Muñoz ◽  
A. Magalhães
Keyword(s):  
Eighteenth Century ◽  
Historic Buildings ◽  
Structural Elements ◽  
Roof Structure ◽  
Intervention Measures ◽  
Wood Beams ◽  
Non Destructive

RESUMOA Igreja de Nossa Senhora do Monte, construída na Bahia, Brasil, provavelmente no início do século XVIII, está localizada em São Francisco do Conde, no Recôncavo Baiano. Atualmente, o edifício encontra-se em estado geral de eversão, principalmente em relação à cobertura e ao desaprumo de paredes. Este trabalho tem como objetivo propor medidas de intervenção patrimonial para estabilização dos referidos elementos construtivos, considerando a manutenção da mesma lógica estrutural existente. Como resultados, serão apresentados: detalhe de reforço do sistema estático das tesouras de linha baixa da nave principal; sumário do projeto de substituição dos atuais barrotes de madeira por vigas metálicas; e detalhe do atirantamento da abóbada do fundo da capela-mor. Ressalta-se a importância deste trabalho de estabilização como metodologia a ser adotada em outras edificações históricas, uma vez que contempla intervenções não destrutivas, relevantes para sítios que contam com patrimônios de significativo valor histórico e cultural.Palavras chave: consolidação; patrimônio; estrutura; reforço.ABSTRACTThe Church of Nossa Senhora do Monte, built in Bahia, Brazil, probably in the eighteenth century, is located in São Francisco do Conde, in the Recôncavo. Currently the building is in a deplorable state of degradation, especially in terms of the roof and stability of the walls. This work proposes intervention measures to stabilize the said structural elements while taking into consideration and respecting the existing structural logic. The following results will be presented: detail of the reinforcement of the wood roof structure of the nave; summary of the project for the replacement of existing wood beams by metal ones; and finally the proposal to repair the vault after the presbytery. This paper emphasizes the importance of this stabilization work as a methodology to be adopted in other historic buildings, since it suggests non-destructive interventions, relevant to sites that have assets of significant historical and cultural value.Keywords: consolidation; heritage; structure; strengthening.

scholarly journals New chances given to historic buildings by implementing revitalisation projects and adapting the premises to serve new functions

2013 ◽  
Vol 12 (3) ◽  
pp. 271-278
Author(s):  
Jan Wrana ◽  
Aleksandra Jarocka-Mikrut
Keyword(s):  
Technical Condition ◽  
Utility Functions ◽  
Public Utility ◽  
Historic Buildings ◽  
Historical Buildings

The article concerns the issue of revitalizing historical buildings by assigning new functions to them. The authors of the writing provide examples of constantly dilapidating edifices in Lublin and their brief historical outlines. Basing on the expert’s report concerning Sobiescy Palace in Lublin, the writers present problems resulting from the technical condition of this as well as other historical buildings. Chances for improving the conditions of such properties by including them in a completely new functional programme are seen by authors. In order to support this thesis, the writers present already implemented revitalization projects in Poland by assigning various new ones, e.g. living and public utility functions to the buildings.

scholarly journals Analysis of repair works to remove the effects of structural failure after a gas explosion

2019 ◽  
Vol 284 ◽  
pp. 02002
Author(s):  
Aleksandra Bąk ◽  
Ryszard Chmielewski
Keyword(s):  
Residential Buildings ◽  
Residential Building ◽  
Technical Condition ◽  
Structural Elements ◽  
Structural Failure ◽  
Gas Explosion ◽  
Gas Explosions ◽  
Construction Supervision ◽  
Bearing Structure ◽  
Construction Works

The article presents the issues of repair works in a multi-family residential building, whose structural and non – structural elements have been damaged and destroyed by a gas explosion and the fire. Gas explosions in residential buildings constitute a small percentage of the total number of building disasters, however, due to the relatively large number of injured people, these incidents are very dangerous [1]. Moreover, the gas explosion often leads to significant material losses and fatalities. Proper assessment of the load-bearing structure after such incident requires an extensive knowledge of the behaviour of structures. The first authority, that issues a decision regarding further use is Construction Supervision Inspector. Until the demolition of the object is ordered, the next step is to provide expert report made by an authorized construction expert, whose aim is to assess the technical condition of the elements of the structure and to determine the scope of necessary repair works. Construction expert, who give such opinion during the assessment of objects immediately after such incident, often has limited access to structural elements, moreover these elements often are covered. Hence, the recommendations contained in these reports often do not include all of required construction works.

scholarly journals Development of strategy for ensuring operability of transport and technological machines

2020 ◽  
Vol 164 ◽  
pp. 03046
Author(s):  
Sergey Repin ◽  
Sergey Maximov ◽  
Andrei Zazykin ◽  
Nikolay Voropaev
Keyword(s):  
Technological Process ◽  
Technical Condition ◽  
Structural Elements ◽  
Transport Equipment

The article presents the results of research in the field of ensuring the performance of complex technical objects on the example of transport and technological machines (TTM), which include transport equipment, as well as technological machines (excavators, loaders and other equipment that performs a technological process). The strategy of forming a system of maintenance and repairs taking into account the technical condition of TTM elements is described. The strategy provides for the division of structural elements of machines into four groups, depending on the principle approach to calculating the frequency of their repair. The criterion for determining the frequency of repairs is the probability of reaching the maximum values of characteristics during the inter-repair period, as well as the degree of criticality of the consequences of possible failure of the element.

scholarly journals Assessment of technical condition and repair of steel structure elements on the example of fire damage in a warehouse building

2019 ◽  
Vol 284 ◽  
pp. 02001
Author(s):  
Andrzej Ambroziak ◽  
Paweł Piotrkowski ◽  
Tomasz Heizig
Keyword(s):  
Steel Structure ◽  
External Source ◽  
Technical Condition ◽  
Actual Condition ◽  
Test Results ◽  
Structural Elements ◽  
Site Investigations ◽  
Laboratory Test Results ◽  
Repair Procedure

The paper analyses a case study on the structural assessment of warehouse building partially damaged by fire caused by external source (fire of lorries close to the building). The authors focus on the site investigations and laboratory test results prior to assessing actual condition of the structural elements. Both strengthening concept and repair procedure of a steel column are addressed here. A short literature survey in the paper regards fire damages and its impact on the entire structural systems and its members.

Stonemasonry skills development: two case studies of historic buildings in Scotland

2016 ◽  
Vol 34 (3) ◽  
pp. 218-241 ◽  
Author(s):  
Scott McGibbon ◽  
Mohamed Abdel-Wahab
Keyword(s):  
Case Studies ◽  
Design Methodology ◽  
Skills Development ◽  
Historic Buildings ◽  
Structural Elements ◽  
Structured Interviews ◽  
Building Stock ◽  
Content Type ◽  
Built Heritage ◽  
Industry Experience

Purpose – Scotland’s built heritage (pre-1919 building stock) is exhibiting varying levels of disrepair, in particular for stonemasonry works, despite the government’s on-going efforts for promoting higher standards of repair and maintenance (R & M) of historic buildings. The purpose of this paper is to examine the problems associated with the R & M of historic buildings. Design/methodology/approach – Two case studies (Projects A and B) exhibiting critical disrepair are reported. Site surveying was carried-out on both projects, to identify site features and R & M problems along with proposed solutions drawing on the lead author’s extensive industry experience as a stonemasonry consultant. Three semi-structured interviews were conducted with professionals involved in each project to elicit views on the challenges faced. Additionally, three industry experts were interviewed to provide a wider perspective of the R & M challenges facing historic buildings. Findings – Neglect and poor practice resulted in both projects becoming more challenging and expensive than they needed to be, which was attributed to generic and advanced skills 6deficiencies of the workforce. There is an urgent need for a multi-disciplinary approach to the development of a method statement for R & M, drawing on the expertise of professionals and contractors, particularly when specifying repairs to structural elements. Originality/value – This paper has provided original and valuable information on R & M problems, highlighting the importance of continued investment in skills development for historic building R & M to enhance existing current training provision and practice. There is a need for further similar project-based data to inform skills development strategies for the R & M of historic buildings as well as enhancing existing qualification frameworks.

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