scholarly journals Thermophysical parameters of the Kežmarok sandstone

2021 ◽  
Vol 1209 (1) ◽  
pp. 012004
Author(s):  
P Jaroš ◽  
M Vertal

Abstract Thermophysical parameters of building materials are required for calculating the complex heat and water transfer in building structures. It can be performed by modern simulation software such as Wufi, Delphin, Math, Comsol Multiphysics and other. This software is suitable for evaluation of water and heat transport in construction of historical buildings, because it can include the impact of water on material properties, driven rain, ground water, heat and water accumulation and other. The material properties of historical building materials are required for the use of this software. In Slovakia, the most used building material was sandstone. Sandstone from Kežmarok was chosen for this paper, which was used in the construction of historic buildings such as churches and town houses. The method of dynamic impulse transition by thermophysical tester RTB was used to determine the thermal properties of sandstone.

2010 ◽  
Vol 133-134 ◽  
pp. 1225-1231 ◽  
Author(s):  
Feng Lin ◽  
Ying Wang ◽  
Xiang Lin Gu ◽  
Xin Yuan Zhao

Important historic buildings may be subjected to accidental loads during their service life. It is therefore necessary not only to evaluate their safety under traditional loads and seismic action (only in earthquake area), but also to evaluate the structural performance of resisting progressive collapse. For historic buildings, two aspects make them different from the modern buildings: the material properties are usually deteriorated to some extent, and the structural system/constructions may not meet the requirements of current design and construction codes. Considering such aspects, a method consisting of four steps to evaluate the performance of the historic buildings to resist progressive collapse is presented in this paper. Firstly, the building layout should be evaluated whether it can protect the occupants from the possible explosion. Secondly, geometrical information, structural constructions and the material properties are to be investigated in details. Thirdly, by means of tie force method and the alternate path method the performance of the structure is analyzed to resist progressive collapse. The load combinations used in the analysis are derived based on the expected service life of the structure. The failure criteria for the structural elements as well as the damage limits for the structure follow the provisions addressed in American Unified Facilities Criteria “Design of Structure to Resist Progressive Collapse” (UFC 4-023-03). Finally, based on the above information an overall evaluation is made for the probably structural retrofitting and strengthening. This method is illustrated with a case study of a steel frame historic building, namely the Bund 18 building, in Shanghai, China. Some suggestions for retrofitting and strengthening this building are also presented.


Author(s):  
Paul Mayencourt ◽  
John Ochsendorf ◽  
Caitlin Mueller

The large impact of building structures on the environment must be reduced to meet the global targets fixed by the Intergovernmental Panel on Climate Change. Standard building structures with constant prismatic cross-section have material inefficiencies of around 66% (and up to 75% in some cases) that need to be addressed. Structural shaping, a subfield of shape optimization, offers a pathway to reduce the impact of building materials on the environment. Shaping statically determinate structures such as simply supported beams is relatively straightforward, but offers few design options compared to statically indeterminate structures. However, no methods provide an efficient way for designers to shape these systems according to their design intent or efficiency goals. Based on plasticity theory, this paper presents a shaping methodology to explore the design space of shaped indeterminate frame structures. The methodology is implemented in three case studies.<br/> In all the case studies, the methodology allows for the exploration of material-efficient yet diverse designs of shaped indeterminate frame structures. The implementation of this methodology can promote the use of structural shaping by offering more agency to structural designers to create diverse and efficient structural systems.


Author(s):  
Al-Ahmmadi Saer Adnan ◽  
Larysa Shuldan

The article highlights the challenges and proposes solutions for integrating solar PV systems into historic buildings. The essential factors and their constituents (excluding natural and orientation), which limit the integration of solar electrical systems (PV) into historical buildings, are analyzed. It proposes its own view of the degree of value of territories and the most historic buildings and associated legal restrictions. The main properties of photovoltaic cells that influence the choice of solutions for integration into buildings of various categories in territories of different values are determined. The suitability for the integration of the visible parts of solar photovoltaic systems is assessed in terms of their selection and adaptation of their properties in the conditions of the historical environment. The visibility of photovoltaic cells installed on the outer shell of building structures from public spaces is investigated as an aesthetic component of integration, initial conditions, approaches and tools for its analysis. A bunch of value features of territories and buildings with a visual and aesthetic component is proposed as the basis for resolving issues related to determining the level of “criticality of the environment” or “sensitivity of the historical context”. Historical buildings of all categories of value make up a significant part of the construction fund of our state. They are the hallmark of our historic cities. But their normal functioning, and possibly their existence, primarily depends on the preservation of their utilitarian function and adaptation to new energy realities. In order to preserve the architectural heritage for future generations, it is necessary to find such approaches and solutions in the energy modernization of historic buildings that will simultaneously increase comfort, reduce energy bills and minimize environmental impact - to preserve historical and aesthetic values.


2021 ◽  
Vol 20 ◽  
pp. 102
Author(s):  
Peeraya Boonprasong

The research on The Initial Survey of Evolution of Adaptive Reuse of Historic Buildings in Thailand is aimed at constructing knowledge for the module named Reuse and Rehabilitation of Historic Buildings. This module is part of the curriculum of Bachelor of Architecture, which studies the role of architecture fabricated within historical buildings. In the era between 1997 and 2012 in Thailand, there was a notable transformation from conservation to contemporary conversion. A review of conservation perspectives indicates a combined multi-disciplinary cooperation between architectural design and conservation. To establish issues regarding the knowledge of conversion, a research question is raised: how do architectural elements play its role through changing of use? Aimed at understanding the complexity among conversion ideologies, issues surrounding architectural elements of historical buildings are rationally explored. Based on significant conversion projects from 1996 to 2012, architectural elements were referenced as to how concepts and objectives were associated.  Qualitative research was conducted through a study of primary sources; survey and classification of representative samples, and secondary documents, records and architectural drawings. The controlling significance of the buildings led to a discussion and an analysis of the architectural designs through new additions and amendments made on the historical fabric. Included in this discussion are the principles of conversion as they relate to the architecture of historic buildings and the ideology of the modification. It is found that understanding a change to architectural elements through an ontological perspective, that of attachment and associational approaches, could clearly reveal the construction programme that felicitates the historical building for which conservation or adaptation is determined. A dialogue on relevant contexts surrounding amendments of architectural elements demonstrated that a strong emphasis towards particular objectives of use could coincidentally harm the historical building’s architectural dimension framework. This leads to the notion that architecture for adaptive reuse should include knowledge of the original construction, a balance among conditions of the existing building, its programming and further habitation. 


Author(s):  
W. B. Li ◽  
G. L. Li ◽  
Y. Yang

<p><strong>Abstract.</strong> In order to solve the problem of "data island" in the management of Fuzhou historical buildings. This paper analyzes historical building management needs and historical building management indicators. Then the data warehouse model of historic buildings is constructed by using dimension modeling method, and a set of data warehouse of Fuzhou historic buildings is designed and established. Finally, a historical building management platform was built on the basis of the historical building data warehouse, which realized the entry, standardization, extraction and cleaning of historical building management data. It provides data support for data mining of historic buildings in order to realize the protection, activation, utilization and standardized management of Fuzhou historic buildings.</p>


2021 ◽  
Vol 6 (2) ◽  
pp. 71-81
Author(s):  
Marcela Spišáková ◽  
Daria Mokrenko

On the present, the problem of renovation of historical buildings is becoming more and more actual. The role of society is to protect and renovate the historical monuments. The presented article focuses on the problem of renovation of historic buildings from a structural, technological and cost point of view. During the solution of the case study "Renovation of roof structure of the Old Town Hall in Košice", a variant solution of the historic roof renovation was designed in accordance with the principles of historical buildings renovation. Subsequently, the evaluation of the technological and cost parameters for renovation; and determination of the optimal variant for renovation of the historical roof was processed through the methods of multicriterial analysis.


2021 ◽  
Vol 248 ◽  
pp. 03077
Author(s):  
Yulu Zhuang

This paper takes the historical and cultural area of Tanhualin in Wuchang District as an example, from the historical construction present situation, the value of historical architecture, discusses three aspects of the historical building protection measures, and finally draws the conclusion: historical building protection needs to emphasize on protection, do repair old as before, to protect the culture at the same time also should pay attention to regain its vitality, achieve sustainable development, and carefully reconsider historical buildings in the present age, the function of space positioning.


2021 ◽  
Author(s):  
Raina Boiadjieva

<p>The studies of building structures accounting construction stages considered the optimization of embedded materials both at the design stage and at the construction stage. Axial shortening of the vertical load-bearing elements under the effect of gravitational loads and due to the characteristics of the building materials is an important point of structural analysis of tall buildings that should be considered. The present study analyzes the influence of the floor structure stiffness and the vertical load-bearing element / floor structure connection over the axial shortening of walls and columns which affects the distribution of normal forces in them. A computational model of a building structure with simplified geometry and loads is considered to emphasize the impact of the stiffness of the floor structure. The results of the solution of several variants of calculation models are compared. Generalized conclusions are given in the end.</p>


Author(s):  
C.H Chen ◽  
S.W Chien ◽  
M.C Ho

Cultural heritages and historical buildings are vulnerable against severe threats from fire. Since the 1970s, ten fire-spread events involving historic buildings have occurred in Taiwan, affecting a total of 132 nearby buildings. Developed under the influence of traditional Taiwanese culture, historic buildings in Taiwan are often built using non-fire resistant brick-wood structure and located in proximity to residential occupancies. Fire outbreak in these types of neighborhood will lead to severe damage of antiquities, leaving only unrecoverable historical imagery. This study is aimed to investigate the minimal safety distance required between a historical building and its surroundings in order to reduce the risk of external fire. This study is based on literature analysis and the fire spread model using a Fire Dynamics Simulator. The selected target is Jingmei Temple in Taipei City. This study explored local geography to identify patterns behind historical buildings distribution. In the past, risk reduction engineering for cultural heritages and historical buildings focused mainly on fire equipment and the available personnel with emergency response ability, and little attention was given to external fire risks and the affected damage. Through discussions on the required safety distance, this research provides guidelines for the following items: management of neighborhoods with historical buildings and consultation between the protection of cultural heritages and disaster prevention, reducing the frequency and extent of fire damages, and preserving cultural resource.


2020 ◽  
Vol 3 (3) ◽  
pp. 51
Author(s):  
Vinicio Velásquez Zambrano ◽  
Álvaro Guzmán Rodríguez ◽  
Gabriela Mejía Gómez ◽  
Ramiro Rosón Mesa

La presente investigación se dirige a realizar una identificación detallada de las fuerzas externas (factores de deterioro naturales y humanos) e internas (materiales constructivos) que afectan a los aparejos en los edificios históricos. Desde este punto de vista, la estructura de un edificio puede definirse como una combinación estable de elementos que se conciben como una unidad, para soportar y transmitir al terreno las cargas correspondientes de forma segura y sin exceder los límites de resistencia de cada uno de estos elementos.En concordancia con este enfoque, se estudiarán las relaciones entre ambos tipos de fuerzas, tomando en cuenta que las fuerzas internas poseen la misión de contrarrestar las externas para conservar el equilibrio estructural de un edificio. La adecuada comprensión de estas relaciones permitirá elaborar una aproximación metodológica para intervenir sobre los aparejos en edificios históricos, desde el respeto a su autenticidad como elementos estructurales y formales del patrimonio arquitectónico. En este sentido, el respeto a la autenticidad solamente puede alcanzarse investigando las técnicas y los materiales constructivos que se utilizaron en la época a la que pertenece un edificio histórico determinado, lo cual facilita que el proceso de restauración y reestructuración del patrimonio arquitectónico se lleve a cabo preservando sus valores históricos y artísticos.Dado que la estructura distingue a la arquitectura del resto de las artes, toda intervención sobre el patrimonio arquitectónico debe partir de la idea de que los elementos estructurales desempeñan una función práctica, contribuyendo de manera decisiva a la conservación de un edificio a través del tiempo, pero también se les puede atribuir una función estética, expresando con ellos los valores artísticos de la época a la que pertenecen. Esta idea se ha reflejado en la historia de la arquitectura desde la Grecia clásica, de modo que los elementos estructurales de cada época se han convertido en símbolos de su arquitectura. En el desarrollo de esta actividad, siempre se puede resolver un problema de varias formas igualmente válidas, pues la atención y el esfuerzo que se dedican a los detalles formales, más allá de las exigencias del cálculo estructural, rebasan el ámbito meramente técnico y aportan valores artísticos de manera deliberada o fortuita.AbstractThis research is aimed to carry out a detailed identification of the external forces (natural and human factors of deterioration) and internal (building materials) which affect the bonding of walls in historical buildings. From this point of view, the structure of a building can be defined as a stable combination of elements which are conceived as a whole, in order to bear and transmit the pertinent loads to the ground in a safe manner and without exceeding the resistance limits of each one of these elements.According to this approach, relations between both types of forces will be studied, considering that internal forces have the purpose of counteracting the external ones in order to preserve the structural balance of a building. The appropriate understanding of these relations will allow to make up a methodological approach to operate on the bonding of walls in historical buildings, from the respect to its authenticity as structural and formal elements of architectural heritage. In this sense, respect to authenticity can only be achieved doing research on the building techniques and materials which were used in the time which a specific historical building belongs to, which facilitates to carry out the restoration and restructuration process of architectural heritage preserving its historical and artistic values.Given that structure differentiates architecture from the other arts, every operation on architectural heritage must start from the idea that structural elements accomplish a practical function, making a crucial contribution to preserve a building through ages, but they can also have an aesthetic function, expressing the artistic values of the time which they belong to. This idea has been reflected in history of architecture from the classical Greece, in a way that the structural elements of each time have become symbols of its architecture. In the development of this task, a problem can always be solved in different manners which are equally acceptable, because the attention and the effort which are invested in formal problems, beyond the requirements of structure calculation, overtake the sphere of mere technique and provide artistic values in an intentional or accidental way.


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