Entity

Time filter

Source Type


Remki M.,National Earthquake Engineering Research Center | Benouar D.,Sudan University of Science and Technology
Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011 | Year: 2011

The estimation of losses resulting from an earthquake requires that for each building class, the relationship between the intensity of ground shaking and damage degree must be known or developed. Potential earthquake damage to structures, human beings and personal property have been the scope of numerous studies. Different approaches have been employed so far to estimate earthquake casualties and damage. This paper describe the basic concept for development of analytical vulnerability functions based essentially on so called damage model which was performed from probabilistic studies on seismic capacity of existing buildings in the city of Algiers. Regarding the developed model for assessing the seismic damage, vulnerability functions of specific losses were developed in order to define the expected seismic risk in case of particular ground motion. Source


Chaouch A.A.,University of Science and Technology Houari Boumediene | Boutemeur R.,Polytechnic School of Algiers | Bechtoula H.,National Earthquake Engineering Research Center | Bali A.,Polytechnic School of Algiers
Periodica Polytechnica: Civil Engineering | Year: 2015

In recent years, and after the 2003 Boumerdes earthquake, a new type of building is being constructed in Algeria. The new concept is based on the concentration of reinforced concrete shear walls with L shape at the building corners. The seismic behavior of such configuration is not well known nowadays. Numerical investigation was carried out on reinforced concrete structure to evaluate the stress distribution at the base of the corner L shaped walls. Influence of number of stories, length of the shear wall as well as the thickness of the wall was considered in our investigation. In total, more than 200 numerical models were crated and analyzed. The analyses showed that, reinforced concrete wall with 15 cm, or less, in thickness should have a minimum length of 10 times the thickness; however, for RC walls with a thickness of more than 20 cm, the length of the wall should be greater than 7 times the thickness. In this paper the main results of this investigation are presented. © 2015, Technical University of Budapest. All rights reserved. Source


Kehila F.,National Earthquake Engineering Research Center | Kehila F.,University of Science and Technology Houari Boumediene | Bechtoula H.,National Earthquake Engineering Research Center | Benaouar D.,University of Science and Technology Houari Boumediene
Computers and Concrete | Year: 2015

Piers are the most vulnerable part of a bridge structure during an earthquake event. During Kobe earthquake in 1995, several bridge piers of the Hanshin Expressway collapsed for more than 600m of the bridge length. In this paper, the most important results of an experimental and analytical investigation of ten reinforced concrete bridge piers specimens with the same cross section subjected to constant axial (or variable) load and reversed (or one direction) cycling loading are presented. The objective was to investigate the main parameters influencing the seismic performance of reinforced concrete bridge piers. It was found that loading history and axial load intensity had a great influence on the performance of piers, especially concerning strength and stiffness degradation as well as the energy dissipation. Controlling these parameters is one of the keys for an ideal seismic performance for a given structure during an eventual seismic event. Numerical models for the tested specimens were developed and analyzed using SeismoStruct software. The analytical results show reasonable agreement with the experimental ones. The analysis not only correctly predicted the stiffness, load, and deformation at the peak, but also captured the post-peak softening as well. The analytical results showed that, in all cases, the ratio, experimental peak strength to the analytical one, was greater than 0.95. Copyright © 2015 Techno-Press, Ltd. Source


Remki M.,National Earthquake Engineering Research Center | Benouar D.,University of Science and Technology Houari Boumediene
KSCE Journal of Civil Engineering | Year: 2014

The estimation of losses resulting from an earthquake requires that for each building class, the relationship between the intensity of ground shaking and damage degree must be known or developed. Potential earthquake damage to structures, human beings and personal property have been the scope of numerous studies. Different approaches have been employed so far to estimate earthquake casualties and damage. This paper describe the basic concept for development of analytical vulnerability functions based essentially on so called damage model which was performed from probabilistic studies on seismic capacity of existing buildings in the city of Algiers (Algeria). Regarding the developed model for assessing the seismic damage, vulnerability functions of specific losses (potential losses for a specific urban area in terms of meter square area of building slabs which may involve causalities) were developed in order to predict the expected seismic risk for a given ground motion scenario. © 2014 Korean Society of Civil Engineers and Springer-Verlag Berlin Heidelberg. Source


Mehani Y.,National Earthquake Engineering Research Center | Benouar D.,University of Science and Technology Houari Boumediene | Bechtoula H.,National Earthquake Engineering Research Center | Kibboua A.,National Earthquake Engineering Research Center
Natural Hazards | Year: 2011

Algeria is a country with a high seismic activity. During the last decade, many destructive earthquakes occurred, particularly in the northern part, causing enormous losses in human lives, buildings, and equipments. In order to reduce this risk in the capital and avoid serious damages to the strategic existing buildings, the government decided to invest in seismic upgrade, strengthening, and retrofitting of these buildings. To do so, seismic vulnerability study of this category of buildings has been considered. Structural analysis is performed based on a site investigation (inspection of the building, collecting data, materials characteristics, general conditions of the building, etc.) and existing drawings (architectural plans, structural design, etc.). The aim of these seismic vulnerability studies is to develop guidelines and a methodology for rehabilitation of existing buildings. This paper presents the methodology followed in our study and summarizes the vulnerability assessment and strengthening of one of the strategic buildings according to the new Algerian Seismic Design Code RPA 99/version 2003. As a direct application of this methodology, both static equivalent method and nonlinear dynamic analysis are performed and presented in this paper. © 2011 Springer Science+Business Media B.V. Source

Discover hidden collaborations