Discover the Latest Journals in Architecture and Architectonics

Architecture is both the process and product of planning, designing, and constructing a building or structure, while architectonics is the scientific study of architecture itself. Architectural works are often considered important cultural symbols and works of art, and we often identify past civilizations with their architectural heritage.

Architecture and Architectonics

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Abstract

Present paper focuses on the modeling of size effect on the compressive strength of normal strength concrete with the application of discrete element method, considering specimen of different concrete mixes and shapes. An equation was derived to estimate the parallel bond strength from the compressive strength. The results showed a good agreement with the literature and the derived estimation models showed strong correlation with the measurements. The results indicated that size effect is stronger on concretes with lower strength class and that it is more significant on cube specimens than on cylinders. The relationship of model size and computational time was analyzed and a method to decrease the computational time (iterations) was proposed.

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Abstract

With the development of economic globalization and the information age, architecture has gradually become a kind of seal of politics, capital and culture, and is divorced from the spirit and life experience of the existing places in the region. Therefore, the field of architecture constantly seeks new research paradigm from the interdisciplinary perspective and reconsiders the creative activities of architecture. From the late last century, with the introduction of architecture by postmodern philosophy, semiotics, geographical psychology, phenomenology and cultural anthropology, there has been a cross-research between architecture and narratology. The recent research hopes to conduct an in-depth analysis of the theory of architectural spatial narrative and its development in the context of complex disciplines, and to research spatial narrative as a design methodology for architecture.

Open access

Abstract

Supply chain management intends to integrate supply chains' activities such as material flow, information flow and financial issues. Material flow management is the most significant issue since the inventory level in the whole supply chain could be optimized by an integrated plan. In other words, when one member of the supply chain plans to reduce its inventory level solely, despite reducing inventory in this node the inventory will be stocked in other partners' warehouses. Therefore, in this paper a new mathematical model has been developed to facilitate the process of finding the optimum solution in economic production, purchase and delivery lots and their schedules in a three-echelon supply chain environment; including raw material in suppliers, manufacturer and assembly facility as a customer. The manufacturer with a flow shop system provides its requirements from supplier, assemble multiple products, and delivers products to the customer (automotive OEM alike) on an optimum multiple delivery points. The delivery cycles would be identified through the production common cycle regarding the supply chain flexibility. Finally, a modified real-valued Genetic Algorithm (MRGA), and an Optimal Enumeration Method (OEM) are developed, and some numerical experiments have been done and compared as well.

Open access

Abstract

The axial capacity of light–gauge steel tube columns filled with concrete including recycled asphalt pavement (RAP) aggregates and recycled concrete aggregates (RCA) was investigated. A total of 51 specimens, including 6 bare steel tubes, 30 composite columns and 15 concrete-only columns were tested under uniaxial load. Fifteen concrete mixes were considered by replacing the weight of natural coarse aggregates (NA) with RCA and RAP at replacement levels of 0, 20, 40, 60, 80, and 100%. In addition, RAP and RCA were combined in the same mixes with replacement levels of (1) 20% RAP and 80% RCA; (2) 40% RAP and 60% RCA; (3) 60% RAP and 40% RCA; and (4) 80% RAP and 20% RCA. Experimental results were analyzed by reporting the ultimate capacities and the patterns of failure. Moreover, the predictions of EUROCODE 4 (EC4) and American Institute of Steel Construction (AISC) codes were checked. ABAQUS software was used to perform a finite element analysis (FEA) of the tested composite specimens. The results showed that using recycled aggregates decreased the carrying capacity of columns. Carrying capacity of light–gauge steel tubes filled with concrete including different combinations of RCA, NA and RAP aggregates can be conservatively predicted by the AISC and EC4 recommendations. Results of FEA showed a good agreement with the experimental results.

Open access

Abstract

The aim of the study is to create an effective and standard risk assessment tool that provides the company with support and security in purchasing of new products. The goal was to create a tool that complements and standardizes risk assessment forms and shows rapid results. Using the procurement risk management system, the risk associated with a given product can be determined easily and in a short time. In the process, critical areas where hazards may occur can be clearly identified and the risk can be minimized if properly managed.

Open access

Abstract

Fiber Optic Network is an advanced and modern system technology, which is used in sending pulses of laser light inside a glass of fiber over long distances, widely used in every environment with various sorts of applications in a different field. It is well-known that the main material of fiber optics is glass, therefore it is typical that the temperature can affect the glass during the thermal expansion. This effect will be applied to the properties of the optical components such as refractive index, radius curvature of the fiber optics layers, and also there is an effect on the data transfer through the fiber optics network units. In this paper, the effect of temperature degree on the optical signal and the functions of the fiber optic network will be simulated, measured, and analyzed. The result will be discussed and the conclusion will show the serious points of thermal effects on the optical signal of a fiber-optic network.

Open access

Abstract

Using alternative fuels (AF) in industry high consuming energy where fossil fuels are largely consumed may be a great solution to decrease CO2 emission and cost production. Or, when using these alternative fuels, the combustion may be difficult to control regarding the different components of AFs compared to fossil fuels. In this case, the use of the computational fluid dynamics CFD tools is a great solution to predict the AFs combustion behavior. This paper represents a computational study of petcoke and olive pomace (OP) co-combustion in a cement rotary kiln burner, established on the commercial CFD software ANSYS FLUENT. This study presents a useful key to choose an adequate simulation model that well predicts co-combustion problems. The performance of the K-ϵ turbulence models varieties (standard, Realizable, and Re-Normalization Group) combined with the hybrid finite rate/eddy dissipation model and the simple eddy dissipation model for predicting the co-combustion characteristics was investigated. The particle phase solutions are obtained using the Lagrangian approach. The performance of the mentioned model was evaluated based on the mesh accuracy, convergence time, temperature shape, and important chemical elements concentration. The predicted values of species concentrations and temperature are compared to the results obtained from the real case study and available literature. The standard K-ϵ model combined with the hybrid finite rate/eddy dissipation model gives the best results and the lower computational resources required for the 2-D model realized.

Open access

Abstract

Climate change has become a real challenge in different fields, including the building sector. Understanding and assessing the impact of climate change on building energy performance is still necessary to elaborate new climate-adaptive design measures for future buildings. The building energy consumption for heating and cooling is mainly related to the building envelope thermal performance. In this study, the winter heat loss and summer heat gain indicators are proposed to assess and analyse the potential impact of climate change on opaque building envelope elements for different climate zones in Morocco over the next 40 years. For that purpose, a one-dimensional heat transfer model is used to simulate the heat transfer through the multi-layer structure of the wall/roof. A medium climate change scenario is considered in this study. The results showed that the current average walls and roof summer heat gain is expected to increase of about 19.2–54.3% by the 2060s depending on the climate zone, versus a less important decrease in winter heat loss varies between –10.6 and –20.6%. This paper provides a reliable evaluation of the climate change impact on building envelope thermal performance, which leads to better adjustments in future building envelope designs.

Open access

Urban Transformations of Kharkiv’s Large Housing Estates •

Novi Budynky and Pavlovo Pole After 1991

Harkov nagy lakótelepeinek városépítészeti átalakulása •

Novi Budynky és Pavlovo Pole 1991 után
Építés - Építészettudomány
Authors: Hlib Antypenko, Nadiia Antonenko, and Katherine Didenko

Kharkiv is the second largest city of Ukraine with a unique history of urban housing development. In the 20th century it became a field of large housing construction. More than 10 large housing estates were constructed in the period between the second half of 1950s–late 1980s following the Soviet method of prefabricated construction, which was introduced into urban planning in connection with the radical change of all architectural and construction activities in the USSR. This paper explores factors of post-socialist urban development (after the change of political regime in Ukraine in 1991) of the case study large housing areas. For the purpose of the study, two Kharkiv large housing areas were selected – Novi Budynky and Pavlovo Pole, which were designed and built in the same period (late 1950s) and were the first residential areas of Kharkiv built according to the new planning principles of Soviet prefabricated construction. Pavlovo Pole is a large housing estate located not far from the historic center regarded as a good quality housing area, intended for the Soviet “intelligentsia” while Novi Budynky is often a stigmatized area constructed mainly for the factory workers.

Key research questions are: description of the history of construction and development of Pavlovo Pole and Novi Budynky large housing estates; comparison of the specific features of their design and construction; to determine how these large housing estates are connected with the rest of the city spatially and in terms of socio-cultural aspect, in particular with the city center; to identify the reasons and content of key urban transformations in the large housing areas, such as: demolition of houses and new construction, reduction of the area of public recreational function, appropriation of deserted areas, etc.

Harkov Ukrajna második legnagyobb városa, amely egyedülálló történettel rendelkezik a városi lakásfejlesztés területén. A 20. században nagy lakásépítkezések zajlottak: az 1950-es évek második fele és az 1980-as évek vége közötti időszakban több mint 10 nagy lakótelep épült Harkovban az előregyártott építés szovjet módszerét követve, amelyet a Szovjetunióban az összes építészeti és építési tevékenység radikális változásával összefüggésben vezettek be a várostervezésbe. Ez a tanulmány az 1991-es ukrajnai rendszerváltás utáni posztszocialista városfejlesztés tényezőit vizsgálja két harkovi nagy lakótelepen. Novi Budynky és a Pavlovo Pole, a város első nagy lakótelepei, melyeket az 1950-es évek végén terveztek és építettek a szovjet előregyártott építés új tervezési elveinek megfelelően. Pavlovo Pole a történelmi központhoz közeli, ma is jó minő-ségű lakóterületnek tekinthető, amit a szovjet „értelmiségnek” szántak, míg Novi Budynky gyakran stigma-tizált városrész, amelyet elsősorban a gyári munkásoknak építettek.

A legfontosabb kutatási kérdések a következők: Pavlovo Pole és Novi Budynky nagy lakótelepei építésének és fejlődésének története; tervezésük és kivitelezésük sajátosságainak összehasonlítása; annak meghatározása, hogy ezek a nagy lakótelepek hogyan kapcsolódnak a város többi részéhez, különösen a városközponthoz térben és társadalmi-kulturális szempontból; a nagy lakóövezetekben zajló, kulcsfontosságú városi átalakulások okainak és tartalmának azonosítása, mint például: házak bontása és új építés, a nyilvános rekreációs területek csökkentése, elhagyatott területek kisajátítása stb.

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Abstract

In this study, a single stage thermoelectric cooler (TER, of size: 21 × 14.2 × 13.5 cm) with thermoelectric module (TEM, of type inbc1-127. 05 with size 40 × 40 × 4.0 mm) and applied electrical power of 30 W and current of 2.5 A, was adopted to estimate the coefficient of performance (COP) of thermoelectric refrigerator (TER). The TER uses a fan to cool the heat exchange region of the TEM. The temperature of the fruit/vegetable samples used in this study was taken before and after cooling for a specific period. The temperatures at both the hot and cold sides of the TEM were also taken at every specific cooling period. The experimented TER can cool vegetable/fruit from about 27 to 5°C within 3 h. The aim of this study is to determine the COP of TER to ascertain the possible applications. The temperature gradient at the heat exchange section of TEM was used to estimate the average theoretical COP to be 0.99, the heat extracted from the cooling chamber and the power supplied was used to estimate the average practical cooling COP to be 0.52; which is within 0.4–0.7 standard COP for a single stage type of TER.

Open access