Bejaia, as many Algerian cities, has undergone profound economic, social, political and urbanistic changes, but is today in a state of anarchy in total abstraction with the urban architectural heritage. In the heart of its center, the district of Bab El-Louz is considered as one of the oldest and most important districts of the city of Bejaia due to its strategic position, the residential character par excellence and its traditional architecture. In recent years, the neighborhood of Bab El-Louz is subject to remarkable changes in its residential space, changes that are made in an informal and unplanned manner, based on individual initiatives to meet the needs of the current situation. These transformations are becoming more and more significant from one day to the next, which has led to a real mutation of the Bab Elouz district, which is spatial, social and functional and which needs to be studied and analyzed. The purpose of this research is to show the consequences of mutation on the basis of architectural and urban transformations and mutations of the residential space of the Bab El-Louz district which threaten the survival of a historical heritage and the future of this district.
With the increase of solid construction waste (CSW) due to the acceleration of urbanization in Algeria, many ecological and environmental issues have been raised. Recycling and reuse of construction waste helps to reduce pollution, carbon emissions and preserve resources. Few studies have focused on the durability characteristics of concretes based on fine aggregates recycled from brick and concrete waste. The main purpose of this study is to formulate and analyze the performance of HPC based on waste brick and concrete fines. The substitution of alluvial sand with brick fines, causes the reduction of the heat of hydration and delays the appearance of the thermal flux peaks. while HPC rich in crushed concrete waste increases the heat of hydration. The appearance of heat flux peaks coincides for all mixtures with fines of waste concrete substitution and they will be delayed and prolonged for HPC with sand based on waste brick.
This study aims primarily to perform a comparative analysis of the seismic response of a soil profile, in the time and frequency domains, in order to evaluate the seismic response of soil subjected to seismic excitation. After a few remarks made on the responses given by the linear elasticity method for this type of problem, it was considered necessary to use SHAKE 2000 and PLAXIS in this study. The obtained results were then compared with those of the available theoretical predictions. Rock elasticity, viscous damping and damping by hysteresis, and the nonlinearity of the ground were then taken into account. In addition, comparisons between recorded responses were also conducted.
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