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RISS 인기검색어
- 검색키워드
- 저자 : Mamdooh Alwetaishi (검색결과 2 건)
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Investigation of school building microclimate using advanced energy equipment
Mamdooh Alwetaishi,Ali Alzaed,Giulia Sonetti,Raid Shrahily,Latif Jalil 대한환경공학회 2018 Environmental Engineering Research Vol.23 No.1
Buildings are responsible of major energy consumption globally. In addition, they are linked to thermal comfort. The need to provide comfort becomes more crucial in schools as they are the place where students learn, and develop their skills. This research aims to investigate the energy responsiveness of new and traditional school building design, where major variation in form, amount of external walls and glazing are different. The research focused on indoor microclimate condition of selected schools in the city of Jeddah where the climate is hot and humid using advanced tools for monitoring. The research uses advanced energy equipment to measure several aspects such as floor temperature, roof temperature, globe temperature and other factors which can lead to predictable thermal comfort of users. The findings suggest that a larger area of glazing shielded from sunlight has a greater influence on both indoor condition and general thermal sensation. The finding also suggests that the glazing ratio is a major contributor on indoor thermal pattern which can result in an increase in temperature profile between from 7-10°C. The findings of this research can assist in the improvement in the design of the prototype school building in hot and humid climate.
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Bending analysis of the multi-phase nanocomposite reinforced circular plate via 3D-elasticity theory
Feng Shao,Yanshang Wang,Abdel Kareem Alzo’ubi,Mamdooh Alwetaishi,Mohamed Amine Khadimallah 국제구조공학회 2021 Steel and Composite Structures, An International J Vol.40 No.4
In this article bending response of multi-phase nanocomposite (MPC) filled by circular plates (MPCCP) in the framework of the three-dimensional elasticity model under bi-directional initially stressed (BDIS) resting on non-polynomial elastic foundation for a broad range of boundary conditions is presented. The discrete singular convolution (SS-DSC) based on state-space is provided to evaluate the bending characteristics of MPCCP by considering various boundary conditions. Halpin– Tsai model and micro-scaled fibers have been applied in the hierarchy to anticipate the properties of bulk material of the multiscaled composites. In order to model a disk, singular point has been analyzed. The graphene platelets (GPLs) are assumed to be oriented in random directions and distributed in uniform pattern in the epoxy resin matrix. Then, to provide the influences of primary stressed, elastic substrate and a range of pressure types on the bending behavior of the MPCCP, a parametric analysis has been conducted. Computational outcomes disclose that sinusoidal load is the best pressure for improving the deformation resistances and stress of the nanocomposite circular/annular plates.
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