Abstract : This paper presents a new concept for a lightweight GFRP slab. The slab construction consists of two layers: a glass fiber-reinforced (GFRP) sections and lightweight concrete (LC). Mechanical tests on six slabs were performed with three parameters the spacing between the GFRP sections, The geometry of GFRP cross section and the stiffeners. Increasing the spacing between GFRP sections reduced the ultimate load capacity of the slab by Increasing the spacing from 233 to 350 lead to reduce the ultimate load from 112 to 91.5 KN. In addition to the different geometry and cross section area led to different inertia, Although the same amount of glass fiber and same volume of specimens the ultimate load arranged in descending order due to the inertia of GFRP sections. The results of using glass fiber stiffeners between GFRP sections were not meet the expectation it had a little bit effect on the ultimate load capacity. It leads to increase in slab ultimate load capacity by 3%. However, the slab failure started by flexural cracks then slippage between the GFRP and the LC. The experimental results compared to theoretical results from previous models and it showed a positive result with HUGO model [1] with matching ratio from 80 to 100%..
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Abstract : Egypt is now at risk of drought, and Cairo will be hurt. It is the sixth-most vulnerable city to environmental risks and the least resilient among 50 global cities. The government hasn't explored the impact of drought on the urban sector as it has on the agricultural one. Besides, it has recently witnessed new desert megacities and luxurious residential communities that will put more pressure on water resources. Globally, cities are promoting resilience to deal with drought, whether by reducing water demand or increasing supply. So, the study aims to explore urban and landscaping techniques that can improve the drought resilience of those residential areas currently experiencing huge expansions in Cairo. A theoretical framework was developed, and then the compatibility in the Egyptian context was evaluated using a case study approach. Madinaty was selected based on expert informal interviews as the most likely case for applying theoretical techniques. Qualitative methods were used to analyze how well they were applied after collecting the primary data using semi-structured interviews, direct observation, and documentary analysis. Results show that Madianty applied a set of techniques to increase its water supply rather than reduce consumption, in contrast to what is commonly used by cities globally..
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