Welcome to American Journal of Civil Engineering and Architecture

American Journal of Civil Engineering and Architecture is a peer-reviewed, open access journal that provides rapid publication of articles in all areas of Civil Engineering and Architecture. The aim of the journal is to provide academicians, researchers and professionals a platform to share cutting-edge development in the field of Civil Engineering and Architecture.

ISSN (Print): 2328-398X

ISSN (Online): 2328-3998

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Website: http://www.sciepub.com/journal/AJCEA

   

Article

The Production of Economical Precast Concrete Panels Reinforced by Waste Plastic Fibers

1Department of Civil Engineering, Koya University, Koya, Kurdistan Regional, Iraq


American Journal of Civil Engineering and Architecture. 2015, 3(3), 80-85
doi: 10.12691/ajcea-3-3-4
Copyright © 2015 Science and Education Publishing

Cite this paper:
Sarmed Fadhil, Mohanad Yaseen. The Production of Economical Precast Concrete Panels Reinforced by Waste Plastic Fibers. American Journal of Civil Engineering and Architecture. 2015; 3(3):80-85. doi: 10.12691/ajcea-3-3-4.

Correspondence to: Mohanad  Yaseen, Department of Civil Engineering, Koya University, Koya, Kurdistan Regional, Iraq. Email: mohanad.yaseen@koyauniversity.org

Abstract

This paper has discussed the effect of adding waste plastic fiber (PET) resulting from cutting the plastic beverage bottles by hand (which is used in Iraqi markets now) as a small fiber to the precast concrete panels. This research presents an experimental program for investigating rupture strength and impact resistance of precast concrete panels with different depths. Different volumes of fibers, i.e. 0%, 0.5%, 1.0% and 1.5% have been added as percentages of concrete by volume. The results show that the maximum volume of PET fiber for a desired rupture and impact resistance was 1.0%. The addition of waste PET fiber to the plain precast concrete panels has economical advantages .It tends to decrease the depth panel from (30 cm × 30 cm × 4 cm) to (30 cm × 30 cm × 3 cm) and the percentage of increase of rupture strength was 34.27% and the percentage of increase of impact resistance was 157.14% for reinforced concrete panels (30 cm × 30 cm × 3 cm) aged at 90-days compared with plain panels of (30 cm × 30 cm × 4 cm). In the impact test the visual observation is that the specimens of fiber reinforced precast concrete panel (FRPCP) have remained together in one piece though broken whilst plain concrete specimens have exhibited the total disintegration.

Keywords

References

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Article

Modelling Rainwater System Harvesting in Ibadan, Nigeria: Application to a Residential Apartment

1Department of Civil Engineering, University of Ibadan, Nigeria

2Faculty of Science and Engineering, University of Wolverhampton, United Kingdom


American Journal of Civil Engineering and Architecture. 2015, 3(3), 86-100
doi: 10.12691/ajcea-3-3-5
Copyright © 2015 Science and Education Publishing

Cite this paper:
Omolara Lade, David Oloke. Modelling Rainwater System Harvesting in Ibadan, Nigeria: Application to a Residential Apartment. American Journal of Civil Engineering and Architecture. 2015; 3(3):86-100. doi: 10.12691/ajcea-3-3-5.

Correspondence to: Omolara  Lade, Department of Civil Engineering, University of Ibadan, Nigeria. Email: omolaralade@yahoo.com

Abstract

Reduction of water consumption associated water wastage in the residential sector is a rapid pressing issue. The residential sector is a substantial consumer of water in every country and therefore constitutes a focus of water consumption efforts. Since the water consumption, characteristics of the residential sector are complex and inter-related, comprehensive models are needed to assess the technical and economic impacts of adopting rainwater harvesting (RWH) as a sustainable system suitable for residential applications in developing countries. This paper has presented the hydraulic and financial modelling of a RWH system using a residential apartment in Ibadan, Nigeria. With a RWHS being site-specific, a Raincycle model was used to optimise tank size and savings. Sensitivity analysis and MonteCarlo simulation were also carried out. The analysis consists of a detailed assessment of the proposed system, taking into account 18 parameters. Seven of these are fixed parameters- catchment surface area, first-flush volume, storage tank volume, pump power rating, pump capacity, UV unit power rating and UV unit operating time while 11 are variable parameters- rainfall profiles, runoff coefficients, filter coefficients, additional inputs (if any), discount rate, electricity cost, mains water cost, water demand, disposal cost, capital cost and decommissioning cost. The RWH and water savings efficiency were assessed and payback period was estimated. Optimising tank size results reveals that the maximum percentage of demand that could be met was 70.6% with a tank size of 4 m3. Optimising saving analysis showed that there were four tank sizes with a potential long-term profit. The best was 4 m3 tank which was predicted to save $259 over 50 years and had a payback period of 21 years, which is typical for a current domestic system. The results show that significant reductions in the total fresh water consumption and the total cost can be obtained. A Monte Carlo simulation shows an important influence of a given set of conditions on the economic viability of RWH systems.

Keywords

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Article

Tourist Living on Off-Shore Wind Turbine: Floating Anchorage Design and Wind/Wave – Structure Interaction Study

1Department of Engineering and Geology, G. D’Annunzio University, Viale Pindaro 42 Pescara, Italy


American Journal of Civil Engineering and Architecture. 2015, 3(3), 101-108
doi: 10.12691/ajcea-3-3-6
Copyright © 2015 Science and Education Publishing

Cite this paper:
Fabio Rizzo, Piero D’Asdia, Federica Speziale. Tourist Living on Off-Shore Wind Turbine: Floating Anchorage Design and Wind/Wave – Structure Interaction Study. American Journal of Civil Engineering and Architecture. 2015; 3(3):101-108. doi: 10.12691/ajcea-3-3-6.

Correspondence to: Federica  Speziale, Department of Engineering and Geology, G. D’Annunzio University, Viale Pindaro 42 Pescara, Italy. Email: federica.speziale@libero.it

Abstract

This paper aims to show a refurbishment project of an off-shore wind turbine, combining its natural purpose of exploiting the wind resources in the windiest sea areas along the coasts of Italy (Sardinia, Sicily, Abruzzo, Apulia) together with the possibility of using its structure as a tourist accommodation. Therefore, the main purpose of the paper is not to evaluate the wind turbine fluid dynamic response, but to study the interaction between civil architecture and mechanical structure. In this way, an economical contribution to the sustainability of the wind farm is possible. On this basis, a floating wind turbine called ARYA, has been designed as case-study. First of all, the 2 tourist-receptive structures (Hotel and bar-restaurant) around the wind tower have been designed and checked. Later, in order to study the effects on vertical cables fixed to the sea bottom, a detailed analysis of the floating anchorage TLP (Tension Leg Platform) was carried out. TLP consists of a nearly fully submerged cylindrical platform, which supports a 5 MW wind turbine and is linked to the sea bottom by 3 ties which assure stability and limited tilting, even under the worst loads induced by wind and sea. Morison’s equation is used to compute the hydrodynamic loading on the TLPs. A numerical model has been implemented and nonlinear dynamic analysis have been performed, investigating both the wind-structure and the wave-structure interaction. The analysis was based on the extreme environmental conditions of the site where it has been suggested to install the system.

Keywords

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