Vertical to Horizontal UHS Ratios for Low to Medium Seismicity Regions with Deep Soil atop Deep Geological Sediments—An Example of the City of Osijek, Croatia

Bulajić, Borko Đ.; Hadzima-Nyarko, Marijana; Pavić, Gordana

doi:10.3390/app11156782

Cited by 4 publications

(1 citation statement)

References 35 publications

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“…Thirdly, it is in line with the current trend to carry out a seismic ground response prediction based on neural network and machine learning [25]. Moreover, another related study examined the effects of deep soil sites atop deep geological sediments but only focused on vertical motion, and the results showed a spectral peak at 0.3 s [26]. In the future, research should be conducted on pebble layers' effects on vertical motion.…”

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confidence: 60%

Study on the Seismic Effect of the Pebble Soil Site in the Zhongwei Basin

Yang

Han²,

Lei

et al. 2022

Applied Sciences

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Based on a large amount of drilling and geophysical exploration work in the Zhongwei Basin, and combined with the collected borehole data of a seismic safety assessment, this paper summarizes and builds 16 typical pebble soil layer calculation models. The effects of the thickness of the pebble layer, the thickness of the overlying silty clay, the top interface of the pebble layer on the peak acceleration and the response spectrum of the site seismic response were analyzed using the equivalent linearization method of the one-dimensional soil layer seismic response. The analysis results showed that the variation in pebble layer thickness had no obvious effect on the peak acceleration of the ground surface under different inputs; the influence of the pebble layer thickness on the ground acceleration response spectrum was primarily concentrated in the middle/high-frequency band of 0.2–0.6 s. Within this range, the acceleration response spectrum of the site with a 30 m pebble layer thickness was small, and the response spectrum curve showed a “trough” shape with a certain “weak isolation” effect. Under the same pebble layer thickness, the upper ground surface peak acceleration with a silty clay layer thickness increased with the increase in the central basin pebble soil field, where a short cycle of the seismic wave amplification effect was more obvious. The response spectrum peak period points were within 0.1–0.2 s and were influenced by the action of rare earthquakes. Moreover, the response spectrum curve showed a more obvious phenomenon of “twin peaks”, and the second peak point appeared in the period of 0.5–0.7 s. With the increase in the input intensity, the PGA amplification ratio of the pebble-top interface was significantly smaller than that of the site surface; under different intensities of input, the acceleration response spectrum of the pebble-top interface showed a “trough” phenomenon that was lower than the bedrock input at approximately 0.1 s. Under the action of rare ground motion, the acceleration response spectrum curve of the pebble-top interface showed a “double peak” phenomenon, and within 0.24–0.4 s, the spectrum value was lower than the bedrock input, showing an obvious shock absorption and isolation effect. Under the action of an earthquake, the energy of the pebble-top interface was concentrated in the low-frequency range of 1.1–2.2 Hz, and the amplification effect was obvious. In the range of 8–10 Hz, the amplitude was lower than the bedrock input, and the seismic isolation effect was obvious.

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confidence: 60%

Study on the Seismic Effect of the Pebble Soil Site in the Zhongwei Basin

Yang

Han²,

Lei

et al. 2022

Applied Sciences

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Maintenance Condition and Seismic Vulnerability of Buildings in Rural Areas – A Case Study of Two Rural Settlements in Osijek-Baranja County

Hadzima-Nyarko

Stojnović

Pavić

et al. 2021

30th International Conference on Organization and Technology of Maintenance (OTO 2021)

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Residential building stock in Serbia: classification and vulnerability for seismic risk studies

Blagojević

Brzev

Petrović

et al. 2023

Bull Earthquake Eng

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Regional seismic risk assessment is necessary for designing effective seismic risk mitigation measures. In general, such risk assessment studies consist of three components: hazard, vulnerability, and exposure modelling. This paper lays the foundations for regional seismic risk assessment of the residential building stock in Serbia and addresses each of the three seismic risk assessment components, either by reviewing the existing or proposing novel models. First, a review of seismic hazard models and seismic design codes used in Serbia in the past 70 years was presented. Next, an overview of Serbia’s population metrics and historical development of Serbian’s residential building stock was presented to provide the context for the exposure model. Furthermore, the paper proposed a novel building classification for Serbia's residential building stock, which is based on the existing building taxonomies, but it has been adapted to account for the local building characteristics. Building damage patterns reported in past earthquakes in Serbia and neighbouring countries were reviewed as a basis for damage classification pertaining to building typologies included in the proposed classification. Finally, the results of a preliminary vulnerability model were presented in the form of expert-based fragility functions derived for buildings typical of Serbia's residential building stock.

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Vertical to Horizontal UHS Ratios for Low to Medium Seismicity Regions with Deep Soil atop Deep Geological Sediments—An Example of the City of Osijek, Croatia

Cited by 4 publications

References 35 publications

Study on the Seismic Effect of the Pebble Soil Site in the Zhongwei Basin

Study on the Seismic Effect of the Pebble Soil Site in the Zhongwei Basin

Maintenance Condition and Seismic Vulnerability of Buildings in Rural Areas – A Case Study of Two Rural Settlements in Osijek-Baranja County

Residential building stock in Serbia: classification and vulnerability for seismic risk studies

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