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 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.

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 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 Survivability of the locomotive cabin at interval estimation of obstacle parameters

2018 ◽  
Vol 216 ◽  
pp. 02021
Author(s):  
Alexander Smolyaninov ◽  
Igor Emel'yanov ◽  
Vladimir Mironov ◽  
Alexei Kuznetsov ◽  
Vasily Lapshin
Keyword(s):  
Finite Element ◽  
Interval Estimation ◽  
Dynamic Strength ◽  
Elastic Interaction ◽  
Strength Criterion ◽  
Structural Elements ◽  
The Finite Element Method ◽  
Initial State ◽  
Calculation Results ◽  
Speed Regime

The article considers the multiparameter problem of the mechanical system behavior and its survivability when destructing individual elements. The technique for constructing the area of safe operation of the cabin of the GT1-h gas turbine locomotive was illustrated on the example of collision of a locomotive with an obstacle at a crossing. The main parameters determining the energy of interaction between the cabin and the obstacle was singled out, and their influence on the survivability of the structure was analyzed. The finite element method was used to calculate the load-bearing capacity of a power frame with a buffer device in the initial state and after the destruction of individual structural elements by the dynamic strength criterion. The force of elastic interaction between the locomotive and the obstacle was estimated through the spring, the rigidity of which was estimated on the basis of the finite element calculation results. As a result of the calculations, proposals were developed to strengthen the cabin frame to ensure the safety of the crew and the instrument part in case of unauthorized collision with an obstacle of considerable mass and violation of the speed regime.

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.

scholarly journals Ensuring safe operation of buildings and structures

2019 ◽  
Vol 97 ◽  
pp. 04019 ◽  
Author(s):  
Elena Gryaznova
Keyword(s):  
Field Observation ◽  
Ecological Monitoring ◽  
Technical Condition ◽  
Soil Base ◽  
Safe Operation ◽  
Safety Measures ◽  
Train Station ◽  
Geotechnical Monitoring ◽  
Under Construction ◽  
Ground Structures

It is possible to ensure safety of the entire construction process as well as safe operation of buildings and structures in future by timely implementation of geotechnical monitoring. Geotechnical monitoring of buildings and structures is a complex research of “soil base – foundation – above ground structures of a building”. Geotechnical monitoring studies behaviour of buildings and structures during construction and operation and, safety measures to prevent hazardous situations in future are undertaken upon analysis of acquired results. Geotechnical monitoring comprises combination of works, including field observation for structures’ behaviour of a building under construction or renovation, its foundation, including soil body surrounding the structure under construction, and field observation for structures of surrounding buildings. Such monitoring allows us to timely detect and prevent non-reversible processes that occur in “soil base – foundation – above ground structures of a building” system. Considering task in hand to ensure safety and security of buildings and structures, list of geotechnical monitoring works can be divided into following blocks: object monitoring; hydrogeological monitoring; ecological monitoring and computational and analytical block which makes assessment of current geotechnical situation on the construction object and develops relevant recommendation for further continuation of works. This article looks into special aspects of multiyear (2005 – 2019) geotechnical monitoring for deformational behaviour of buildings under operation, open parking spaces No.1 and No.2, located in area of effect from construction of railway connecting Vnukovo-1 airport and Kievskiy train station in Moscow and in the area of effect of new Vnukovo-1 airport construction. Article looks into tasks to ensure regular operation of existing buildings and monitoring of hazardous situations and their origin caused by construction works or poor technical condition of monitored objects. Particular to renovation of Vnukovo-1 airport, that started in 2005 is the fact that during construction it was necessary to ensure operation of a number of maintained buildings. Among them are open parking spaces No.1 and No.2.

Pragmatic improvements to seismic resilience of non-structural elements

2016 ◽  
Vol 49 (1) ◽  
pp. 22-33 ◽  
Author(s):  
Helen Ferner ◽  
Matthew Lander ◽  
Gavin Douglas ◽  
Andrew Baird ◽  
Martin Wemyss ◽  
...  
Keyword(s):  
New Zealand ◽  
Seismic Performance ◽  
Current Approach ◽  
Economic Losses ◽  
Structural Elements ◽  
Existing Buildings ◽  
Significant Damage ◽  
Canterbury Earthquake Sequence ◽  
Recent Earthquakes ◽  
Seismic Resilience

The recent Canterbury earthquake sequence and the more recent Seddon, Lake Grassmere and Castlepoint earthquakes have raised awareness of the vulnerability of non-structural elements of buildings (e.g. ceilings, cladding, building services equipment and piping, etc.). With architectural and building services components comprising up to 70% of a building’s value, significant damage to these elements resulted in some buildings being declared economic losses, even when the structure itself was not badly damaged. Impacts on business continuity due to the damage of non-structural elements have also been identified as a major issue in recent earthquakes in New Zealand, as well as worldwide. It appears a step change is required in the seismic performance of non-structural elements in New Zealand. This paper explores whether the current approach being used in New Zealand for non-structural contractor designed elements is appropriate in meeting society’s expectations. It contrasts the approach that has historically been taken in New Zealand, with that followed overseas. The paper goes on to explore a pragmatic “best bang for the buck” approach to upgrading non-structural elements in existing buildings. The approach is presented through illustrated examples of issues and solutions that have been adopted. It also discusses the challenges with trying to upgrade non-structural elements within existing operational buildings including for example, congestion issues and practicalities of access. The paper concludes with ideas on possible ways to improve the seismic performance of non-structural elements within the New Zealand environment and regulatory regimen from both design and construction perspectives.

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