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Journal Cover American Journal of Civil Engineering and Architecture
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  This is an Open Access Journal Open Access journal
   ISSN (Print) 2328-398X - ISSN (Online) 2328-3998
   Published by Science and Education Publishing Homepage  [72 journals]
  • Response of Domestic Damascene Architectural Elements to the Climatic
           Factors between the Traditional and Modern Times

    • Authors: Mansour Yeganeh; Zeinab B. Farhat, Hiba A. Al-Hawasili
      Pages: 1 - 7
      Abstract: The climatic factors (temperature, humidity, earth geology, wind speed and direction, solar radiance) are considered one of the most important effects on any site prepared for construction. Thus, these factors are studied before suggesting any schematic regulations and plans for its influence on the building form, allocation, materials options, and suitable green cover, and the functional distribution between parts. This study is trying to analyze the effects of climatic and regional factors on the design elements of the domestic architecture of Damascus. We are going to select different cases of traditional houses that evolved and transformed through several transitions of history. Then we will analyze these transformations and the extent of the response and maintenance of respecting climatic conditions. Research method is descriptive and interpretative. For literature review the descriptive method is used and analyzing of cases is done by interpretative method. Samples are selected from saurian traditional and modern hoses. Building materials, shape of spaces and opening are studied variables in this study. Comparative method is used for comparison of mentioned variables in related to climate factors. The result of study shows that the traditional house in Damascus is considered a reflection of serious attempts in the environmental design which is compatible with regional climate. New buildings completely ignored climate closed central space, called (the sofa) replaced the interior courtyard within the traditional dwelling, with a deficit of this space to insuring sufficient light and air inside the building. Also it relied on those structural materials of medium or high energy content, such as cement, glass and aluminum, which are widely used today in constructing modern residential buildings, despite the lack of suitability of climate in the region. This was accompanied by the excessive use of heaters and air-conditioners to achieve the thermal comfort inside the building, without considering the amount of energy consumed.
      PubDate: 2017-1-14
      Issue No: Vol. 5, No. 1 (2017)
  • Prediction of Punching Strength of Reinforced Concrete Footings by Finite
           Element Method

    • Authors: Faris R. Ahmed; Kamaran K. Hamad, Zahraa N. Rashied
      Pages: 8 - 16
      Abstract: This paper presents a nonlinear finite element modeling and analysis of the punching behaviour of reinforced concrete footings. The foundation system was modeled using ANSYS software. Several experimental tests were collected from literature to support the software outputs. The deflection in the footing’s concrete has been studied, marking the cracking patterns under column, and computing the failure loads for each footing. The experiments results were compared with the finite element results obtained from the modeled footing. The results indicated that the punching behaviour obtained from the analytical model using ANSYS software give good agreement with the experimental data with conservative difference of about 10 percent. Also, results of column`s punching shear capacity, using a number of codes of practice, were presented in this paper and compared with both experimental and the finite element results.
      PubDate: 2017-2-5
      Issue No: Vol. 5, No. 1 (2017)
  • Noise Generated by Portable Saw in Different Construction Materials

    • Authors: Adriano A. R. Barbosa; Stelamaris R. Bertoli
      Pages: 17 - 24
      Abstract: As part of efforts to identify sources of noise pollution from construction, a methodology is developed here for the standardized assessment of noise from masonry saws, which are electric cutters that are commonly used in the industry. Such standardized assessments could aid the development of quieter machines and also of less disruptive and safer industrial practices. The proposed methodology compares the noise generated during cutting with that of free-running non-cutting equipment in accordance with ISO 3744:2010, which specifies methods of determining sound power levels of noise sources via measurement of sound pressure for an essentially free field over a reflecting plane. The cutting of the proposed standard load (concrete slabs) and different building materials was louder than the disengaged saw. The highest observed sound power level was 110.1 dB. The smallest difference observed between the cutting and disengaged saw was 5.5 dB. Noise generated by the saw was quantitatively assessed. The results allowed a standard material to be proposed for use in tests determining the sound power levels of masonry saws. This study also contributes to the analysis of occupational noise generation, considering the difficulties in obtaining previously reported values of the sound spectrum of masonry saws.
      PubDate: 2017-2-5
      Issue No: Vol. 5, No. 1 (2017)
  • Laboratory Investigation on Performance of Strengthening Techniques of RCC

    • Authors: Mir Abdul Kuddus; Izharul Haque Azad
      Pages: 25 - 28
      Abstract: Reinforced concrete members are the most abundantly used construction elements in civil engineering. These members are normally designed to sustain various types of loads. But due to several reasons the members experience much more load beyond their capacity. Inadequate attention during design and construction of new additional RCC story in our country has raised question about the performance of existing structures. RCC beam is such an important member which sometimes needs to be strengthened. There are various methods of strengthening that have been studied by the researchers such as section enlargement, use of additional bars, use of FRP and CFRP, use of ferrocement, steel plates, etc. This thesis work aims to study and compare the effect of three distinct strengthening techniques- providing additional steel bars from underneath with U shaped shear reinforcement, use of wire mesh and providing single layer of geo-textile with adhesive. The experimental results show that the percentage increase in ultimate load carrying capacity for the steel, wire mesh and geo-textile were found to be 51.96%, 26.5% and 14.5% respectively with respect to reference beams. The value of deflection at failure were 5.63mm, 6.18mm and 5.83 mm respectively while for reference beam the value was 5.33mm. The performance of geo-textile was very poor. The use of wire mesh provides greater value of deflection at failure compared to other two methods but the increase in load carrying capacity is about half of that for steel bar. The application of additional steel is labor intensive compared to other two methods but in terms of ultimate load, it overweighs the advantages compared to other two strengthening techniques.
      PubDate: 2017-2-5
      Issue No: Vol. 5, No. 1 (2017)
  • Geotechnical Characterization of Local Materials Used in Road Construction
           in the Brazzaville Aera, Congo

    • Authors: David Bilembi; Hilaire Elenga, Timothée Nsongo, Bernard Mabiala, Adolphe Kimpena, Balla Diop Ngom, Aboubaker Chedikh Beye
      Pages: 29 - 34
      Abstract: The survey of the road construction materials within the Brazzaville Area in the Congo was conducted on the geotechnical data of materials collected from different sites in order to establish a correlation with the norms of their use in Civil Engineering fields. These data include grading curves, consistency limits for the fine fraction, modified Proctor test results and CBR tests. Those data were subjected to classical statistic processing (characterization of every geotechnical parameter variability, study of correlations between parameters). The survey concludes that the material samples analyzed present so close physical properties that they cannot be clearly distinguished through statistical analysis. The overall analysis of the CBR index values varies depending on the materials used. As a consequence these variations cause the deterioration of the pavement structure. The constituents that comply with the above-defined physical properties can be used as materials of a pavement structural layer. The deterioration effects and the granular fragmentation from the Inkisi formations help appreciate the Micro-Deval coefficient and the Los Angeles coefficient, for the figures of both coefficients and result in high figures which means better basic mechanical properties of the foundation and structural layers.
      PubDate: 2017-2-7
      Issue No: Vol. 5, No. 1 (2017)
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
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Fax: +00 44 (0)131 4513327
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