M. BOULAOUAD Abderrachid

MCA

Directory of teachers

Department

CIVIL ENGINEERING

Research Interests

Specialized in CIVIL ENGINEERING. Focused on academic and scientific development.

Contact Info

University of M'Sila, Algeria

Email : abderachid.boulaouad@univ-msila.dz

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Recent Publications

2024-12-15

DYNAMIC MODELING OF SOIL-STRUCTURE INTERACTION FOR SEISMIC PERFORMANCE EVALUATION OF REINFORCED CONCRETE BUILDING

This study focuses on the effect of soil-structure interaction on the dynamic behavior of structures subjected to seismic movements. A 2D model of a simple minaret, 18.4 meters tall with a width and length of 3.5 meters, was analyzed using the SAP2000 V21 finite element software. Two types of seismic loading were applied: the response spectrum of Algerian seismic regulations (RPA 99 version 2003) for low seismicity (zone: Z1), and accelerograms measured at the Keddara site in Boumerdès, Algeria, in 2003. The soil foundation is classified as type S3 (loose soil), and the analysis included conditions both with and without soil-structure interaction.
The results indicate significant impacts of soil-structure interaction: the inclusion of soil effects led to a 25% reduction in base shear and a 15% increase in the fundamental period of the structure compared to the reference model without soil interaction. Additionally, nodal horizontal displacements at the top of the building increased by 40% when accounting for soil-structure interaction, affecting the overall stability and design considerations. This study underscores the importance of incorporating soil-structure interaction in the design process, as neglecting these effects could lead to underestimating the seismic demand and potentially compromise structural integrity.
Citation

M. BOULAOUAD Abderrachid, (2024-12-15), "DYNAMIC MODELING OF SOIL-STRUCTURE INTERACTION FOR SEISMIC PERFORMANCE EVALUATION OF REINFORCED CONCRETE BUILDING", [national] JOURNAL OF APPLIED ENGINEERING SCIENCES , Sciendro

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2022

Limit Analyses of the Active Earth Pressure on Rigid Retaining Walls under Strip Loading on Backfills

Recent studies of retaining walls include experimental studies, numerical analysis and analytical models. Although active earth pressure against retaining structures has received much attention, the evaluation of active earth pressure of backfill when loaded by a strip foundation, has been slightly studied. This paper studies the effect of a strip load on the active pressure force and the distribution of the horizontal stresses on a rigid wall, using a finite element limit analysis. The strip loading is located at different distances from the vertical face of the wall. The OptumG2 code is used to analyze the effect of width of strip surcharge (soil-wall), interface friction angle and soil internal friction angle. New interesting results are demonstrated and presented here: the dependency of the active earth pressure coefficient on both position and width of the strip load, in one hand, and the effect of the internal friction angle of the soil, the soil-wall interface, and the position of the strip loading on the failure mechanism, in the other hand.
Citation

M. BOULAOUAD Abderrachid, (2022), "Limit Analyses of the Active Earth Pressure on Rigid Retaining Walls under Strip Loading on Backfills", [national] Annales de Chimie - Science des Matériaux , Lavoisier

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EFFECT OF SHEAR WALLS ON THE BEHAVIOR OF NON-LINEAR STRUCTURES IN SEISMIC ZONES

In some regions of the world subjected to frequent severe earthquakes, such as Algeria, attention is focused on seismic design in order to assure the public welfare. When, for many countries most of the building consists of constructions of “self-steady frames” type system. The last seismic events have shown the inefficiency of such a type of to avoid evident disaster. On the other hand, the use of shear walls as “Lateral Load Resisting System” (LLRS) seems to be a good alternative. This study tries to confirm the requirement of shear walls in seismic zones by highlighting their beneficial effect on structures subjected to strong motions. For this purpose, a comparison is made between the two types using both linear and nonlinear analysis with a focus on two parameters which are of great im-portance, the base shear and the lateral drift in particular. Applications are made on two types of Reinforced Concrete (RC) multistory structures: with shear walls (dual systems) and without (w/o) shear walls (self-steady structures). The results permit to emphasize the need of shear walls as LLRS in seismic zones and confirm the restrictions imposed by the Algerian code, amongst others, concern-ing the use of self-steady frames system for structures in such area.
Citation

M. BOULAOUAD Abderrachid, (2022), "EFFECT OF SHEAR WALLS ON THE BEHAVIOR OF NON-LINEAR STRUCTURES IN SEISMIC ZONES", [national] Mining Science , Mining Science

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2020

Experimental Investigation on the Properties of a Recycled Aggregate Concrete Based on Waste of the Industrial Mineral Additions

This study investigates the possible effects of incorporating different industry wastes
during manufacturing of concrete, with percentages ranging from 0% to 30%, and
assesses the influence of these combinations (mineral additions and recycled
aggregates) on the properties of a recycled concrete comprised of these two main
constituents products. Recycled concrete samples with different combinations of
mineral additions at various dosages were used to determine these properties in the
fresh and hardened states. The ”Design-expert” methodology was used to analyse the
results after 7, 14 and 28 days, identifying correlations and the effects of the different
variables. The results obtained showed the advantageous effect of incorporating the
pozzolana and slag into the concrete mixture at dosages of 15% and 30%, they also
demonstrated the low optimal percentage of marble fillers of 5%. These findings
suggest that replacing clinker with industrial waste could limit the dust and CO2
emissions into the atmosphere during concrete manufacture, offering environmental
advantages as well as conserving the natural resources of aggregate recovery from
C&D wastes.
Keywords: environmental concrete, mineral additions, recycled aggregate, design
expert method
Citation

M. BOULAOUAD Abderrachid, KESSAL Oussama, NOUI Ammar, MECHERI Med Cherif, BOUZID Abderrazak, , (2020), "Experimental Investigation on the Properties of a Recycled Aggregate Concrete Based on Waste of the Industrial Mineral Additions", [international] RICON19 REMINE International Conference on Valorization of Mining and Industrial Wastes into Construction Materials By Alkali-activation , Covilha, UBI Portugal

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2010

Review of the Algerian seismic design code spectrum

The specific "seismic design spectrum" proposed by the Algerian seismic design code, namely the
"normalized acceleration spectrum", seems to present an anomaly in comparison with other seismic
design spectra over the world and with computed spectra, especially in the first branch of the curve,
corresponding to the range of short periods, where the spectrum is a decreasing line whereas it must be
an increasing one. This anomaly is outlined and confirmed, in one hand, and treated by proposing an
appropriate formula instead of the available one, in the other hand. Some numerical applications are
made using both available and proposed formula. This work may be considered as a contribution to the
revision of the Algerian seismic design code which is continually done in order to make it more realistic
and more perfect.
Key words: Algerian seismic design code, response spectrum, seismic force.
Citation

M. BOULAOUAD Abderrachid, (2010), "Review of the Algerian seismic design code spectrum", [national] Journal of Civil Engineering and Construction Technology , Academic Journals

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