Evidence for fault-related directionality and localized site effects from strong motion recordings of the 2003 Boumerdes (Algeria) earthquake: Consequences on damage distribution and the Algerian seismic code

Laouami, Nasser; Slimani, A.; Bouhadad, Youcef; Chatelain, Jean‐Luc; Nour, Ali

doi:10.1016/j.soildyn.2006.03.006

Cited by 37 publications

(27 citation statements)

References 15 publications

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“…After this seismic event Boumerdès city is now reclassified in zone III, corresponding to the highest hazard zone in the new Algerian seismic code classification (RPA 2003). The recorded peak ground accelerations during the May 21, 2003 (Mw = 6.8) Zemmouri earthquake reached 0.58 g (amplified value by site conditions) and 0.34 g (non amplified value) at 20 km far from the epicenter Laouami et al 2006) (Fig. 3).…”

Section: Seismotectonic Settingmentioning

confidence: 92%

“…6. The data analysis required a coding in a data base (Boumerdès_Data_Base and Geo_Map) under GIS framework that allows easy handling, processing, managing, exploiting, treating, and interpreting Laouami et al 2006) the large amount of data. It allows the needed capacity of spatial analysis, data management, and updates as well as mapping (Carrara et al 1995;Ayalew et al 2005).…”

Section: Geological Hydrogeological and Geotechnical Data: Spatial mentioning

confidence: 99%

“…The May 21, 2003 (Mw 6.8) Zemmouri earthquake caused 2384 deaths and widespread damage of buildings. The observed severe ground motion amplitude was, partly, caused by the lithographical and topographical amplification effects of seismic motion (DLEP 2004;Hellel et al 2010;Dunand et al 2004;Laouami et al 2003;Laouami et al 2006;Meslem et al 2012;Bensalem et al 2010). Worldwide, during the last few decades, liquefaction hazard zonation became among the first steps in each seismic risk analysis and mitigation strategy in urban areas.…”

Section: Introductionmentioning

confidence: 99%

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Liquefaction hazard mapping in the city of Boumerdès, Northern Algeria

Bourenane

Bouhadad

Tas

2017

Bull Eng Geol Environ

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The city of Boumerdès, located in Northern Algeria, was badly affected during the May 21, 2003 Zemmouri (Mw = 6.8) earthquake where extensive liquefaction has been reported. The aim of this paper is to assess and to map the liquefaction potential for Boumerdès. We collected and used data from 154 boreholes, 10 down-hole tests, 56 standard penetrations tests (SPT), and inventory of 35 water level points. This data has been analyzed in the framework of geographical information systems (GIS). We assessed the liquefaction potential index (LPI) by considering a seismic hazard scenario corresponding to a max = 0.48 g calculated, using a probabilistic approach, for a return period of 500 years. LPI values have been correlated to compile the liquefaction hazard map that indicates the quantitative characteristics of the liquefiable layers and the induced disruption probability area. Results show that the main part of the city of Boumerdès belongs to a low liquefaction potential area except for a narrow corridor along the Corso waterway, where the liquefaction potential is moderate to high. The obtained results are compatible with the geological, geotechnical and hydrogeological susceptibility to liquefaction of the area. The results also show a good agreement with the observations made after the May 21, 2003 Zemmouri earthquake. The obtained liquefaction hazard maps may serve as useful tools for land management and planning in the city of Boumerdès and as an example of liquefaction hazard assessment that may be applied in other populated cities in northern Algeria's seismic prone areas.

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Section: Seismotectonic Settingmentioning

confidence: 92%

Section: Geological Hydrogeological and Geotechnical Data: Spatial mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Liquefaction hazard mapping in the city of Boumerdès, Northern Algeria

Bourenane

Bouhadad

Tas

2017

Bull Eng Geol Environ

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“…Between 1900 and 2015, the Mediterranean region experienced thousands of damaging earthquakes, some of which were major disasters, such as the earthquakes of Messina, Italy, in 1908(Barbano et al 2005, ChiosCesme, Greece, in 1949 (Altinok et al 2005), Agadir, Morocco, in 1960(El Alami et al 2004, El-Asnam, Algeria, in 1980 (Bertero andShah 1983), Izmit, Turkey, in 1999 (Barka 1999), and more recently, Boumerdes, Algeria, in 2003 (Laouami et al 2006). These six damaging earthquakes resulted in over 150,000 deaths and caused direct losses of more than USD 26.5 billion.…”

Section: Introductionmentioning

confidence: 99%

Economic and Human Loss Empirical Models for Earthquakes in the Mediterranean Region, with Particular Focus on Algeria

Guettiche

Guéguen

Mimoune

2017

Int J Disaster Risk Sci

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In this study, loss estimation models were developed for reasonably accurate assessment of economic and human losses from seismic events in the Mediterranean region, based on damage assessment at an urban scale. Data were compiled from existing worldwide databases, and completed with earthquake information from regional studies. Economic data were converted to a single common currency unit (2015 USD value) and the wealth of the areas affected by 65 earthquakes of the region from 1900 to 2015 was assessed. Reduced-form models were used to determine economic and human losses, with earthquake magnitude and intensity as hazard-related variables, and gross domestic product of the affected area and the affected population as exposure-related variables. Damage to buildings was also used as a hazard-related variable to predict economic and human losses. Finally, site-specific regression models were proposed for economic and human losses due to earthquakes in the Mediterranean region, and more specifically, in Algeria. We show that by introducing the damage variable into the models, prediction error can be reduced, and that accuracy of loss model estimation is site dependent and requires regional data on earthquake losses to improve. A case study for Constantine, Algeria shows the improvements needed for increased accuracy.

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“…In terms of seismology, the epicentre of the main shock, which was felt within a 250-km radius from the epicenter (Laouami et al 2006), was at 36.91 N and 3.58 E, as provided by the Algerian Research Center of Astronomy, Astrophysics, and Geophysics (CRAAG). However, Bounif et al (2004) determined that the epicenter was at 36.83 N and 3.65 E (Figure 1), at a depth of 8 to 10 km.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Building Characteristics and Site Conditions on the Damage Distribution in Boumerdès after the 2003 Algeria Earthquake

et al. 2012

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This study highlights the major contributing factors to the observed damage distribution in the city of Boumerdès after the 2003 Algeria earthquake. The results of field investigations and statistical analyses show that a majority of the damaged buildings, mostly mid-rise reinforced concrete (RC) moment-frame systems, were located on steep slopes and small hilltops, along river valleys. The horizontal-to-vertical (H/V) ratios from free-field microtremor measurements at these sites did not show clear results. In contrast, buildings with the same structural characteristics located on flat ground did not suffer much damage, and clear peaks were observed from the H/V ratio curves. The amplification effects of topography have not been incorporated into the revised Algerian seismic code, but the results from this study show the importance of considering this factor when designing new buildings for earthquake resistance.

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Evidence for fault-related directionality and localized site effects from strong motion recordings of the 2003 Boumerdes (Algeria) earthquake: Consequences on damage distribution and the Algerian seismic code

Cited by 37 publications

References 15 publications

Liquefaction hazard mapping in the city of Boumerdès, Northern Algeria

Liquefaction hazard mapping in the city of Boumerdès, Northern Algeria

Economic and Human Loss Empirical Models for Earthquakes in the Mediterranean Region, with Particular Focus on Algeria

The Effects of Building Characteristics and Site Conditions on the Damage Distribution in Boumerdès after the 2003 Algeria Earthquake

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