Spectral displacement (SD) of banda aceh’s soft soil for seismic vulnerability assessment

Reliable spectral displacement (SD) in a wide range of response periods is crucial in seismic vulnerability assessment for Banda Aceh-Indonesia as the city is founded on a thick-soft soil. This SD is excellent for estimating building drift ratio from which the vulnerability of building is assessed. SD can be obtained from conversion of the acceleration spectra (converted SD) and site response analysis (analyzed SD). In this paper, both converted- and analysed-SDs are developed for Banda Aceh’s soft soil case using three historical seismic events of the 2012 Simeulue II, the 2013 Mane-Geumpang, and the 2013 Bener Meriah earthquakes and three soil models from which acceleration-displacement response spectrum (ADRS) of Banda Aceh’s soft soil is proposed. This proposed ADRS is compared to the generic response spectra of Centre of Research and Development of Housing and Settlement (PUSKIM) Indonesia. It can be concluded that the Proposed ADRSs can be used as another source in determining the performance of a building beside the PUSKIM ADRSs. Furthermore, the developed SDs were used to calculate the drift of 2-, 3-, and 4-storey typical shop-house buildings at Banda Aceh-Indonesia.

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Design Earthquake Response Spectrum Affected by Shallow Soil Deposit

Advances in Civil Engineering ◽

10.1155/2019/4079217 ◽

2019 ◽

Vol 2019 ◽

pp. 1-18 ◽

Cited By ~ 1

Author(s):

Dong-Kwan Kim ◽

Hong-Gun Park ◽

Chang-Guk Sun

Keyword(s):

Soil Depth ◽

Site Response ◽

Response Spectrum ◽

Soft Soil ◽

Response Spectra ◽

Earthquake Response ◽

Ground Acceleration ◽

Site Class ◽

Shallow Soil ◽

Short Period

Site response analyses were performed to investigate the earthquake response of structures with shallow soil depth conditions in Korea. The analysis parameters included the properties of soft soil deposits at 487 sites, input earthquake accelerations, and peak ground-acceleration levels. The response spectra resulting from numerical analyses were compared with the design response spectra (DRS) specified in the 2015 International Building Code. The results showed that the earthquake motion of shallow soft soil was significantly different from that of deep soft soil, which was the basis of the IBC DRS. The responses of the structures were amplified when their dynamic periods were close to those of the site. In the case of sites with dynamic periods less than 0.4 s, the spectral accelerations of short-period structures were greater than those of the DRS corresponding to the site class specified in IBC 2015. On the basis of these results, a new form of DRS and soil factors are proposed.

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Evaluation of the effect of depth to bedrock on seismic amplification phenomena

10.5194/egusphere-egu2020-5848 ◽

2020 ◽

Author(s):

gaetano falcone ◽

giuseppe naso ◽

stefania fabozzi ◽

federico mori ◽

massimiliano moscatelli ◽

...

Keyword(s):

Seismic Waves ◽

Site Response ◽

Soft Soil ◽

Free Field ◽

Response Spectra ◽

Maximum Depth ◽

Response Analysis ◽

Local Conditions ◽

Seismic Amplification ◽

Bedrock Depth

<p>When an earthquake occurs, the propagation of the seismic waves is conditioned by local conditions, e.g., depth to seismic bedrock and impedance ratio between soft soil and seismic bedrock. Bearing in mind that the maximum depth of site prospections generally does not extend up to seismic bedrock depth, a parametric study was carried out with reference to ideal case studies in order to investigate the effect on local seismic amplification of the depth to bedrock.</p><p>The results are presented in terms of charts of amplification factors (i.e., ratio of integral quantities referred to free-field and reference response spectra) and minimum depth to investigate vs building type. These charts will allow defining the thickness of the cover deposit that should be characterised in terms of geophysical and geotechnical parameters in order to perform seismic site response analysis according to a precautionary approach, in areas where depth to seismic bedrock is higher than conventional maximum depth of site surveys.</p>

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Inelastic Response Spectrum for Simplified Deformation-Based Seismic Vulnerability Assessment

Journal of Earthquake Engineering ◽

10.1080/13632460701457272 ◽

2008 ◽

Vol 12 (2) ◽

pp. 222-248 ◽

Cited By ~ 5

Author(s):

M. Safar ◽

A. Ghobarah

Keyword(s):

Vulnerability Assessment ◽

Seismic Vulnerability ◽

Response Spectrum ◽

Seismic Vulnerability Assessment ◽

Inelastic Response

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Design Response Spectra Based on Earthquake Hazard Maps and Specific Soil Properties at Indonesian Ports According to SNI 1726 2019

Jurnal Teknik Sipil ◽

10.28932/jts.v17i1.3423 ◽

2021 ◽

Vol 17 (1) ◽

pp. 41-54

Author(s):

Christino Boyke Surya Permana

Keyword(s):

Site Response ◽

Response Spectrum ◽

Earthquake Hazard ◽

Response Spectra ◽

Site Response Analysis ◽

Response Analysis ◽

Spectral Acceleration ◽

Hazard Maps ◽

The Difference ◽

S Period

Indonesia has a new seismic code, namely SNI 1726 2019 (SNI 2019). It is developed based on the 2017 Indonesian Earthquake Source, Hazard Maps, and ASCE 7-16. This paper is intended to explain the procedure for calculating response spectrum according to SNI 1726 2019, at ten ports located in Indonesia. The results are then verified with the software RSA2019. Furthermore, it will be compared to SNI 1726 2012 (SNI 2012) to see the difference in spectral acceleration value (Sa). The result presents that the ports located in Sorong and Banggai have the highest Sa, whereas the port in Banjarmasin has the smallest value. Port in Surabaya and Tuban have nearly the same Sa due to their close location, while Banyuwangi has a Sa value slightly above them. The ports in Padang, Lampung, and Penajam must use a specific site response analysis to determine the design response spectra, which is not discussed in this paper. The comparison with SNI 2012 shows that the response spectra of SNI 2019 have a higher Sa than SNI 2012. However, in some areas such as Tuban and Sorong, the Sa of SNI 2012 at 0.1 to 0.6 s period are larger than SNI 2019.

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Site response analysis and its comparison with the peruvian seismic design spectrum

Revista TECNIA ◽

10.21754/tecnia.v29i2.700 ◽

2019 ◽

Vol 29 (2) ◽

Author(s):

Juan Tarazona ◽

Zenón Aguilar ◽

Jose Barrantes ◽

Luis Vergaray

Keyword(s):

Seismic Design ◽

Site Response ◽

Response Spectrum ◽

Site Response Analysis ◽

Response Analysis ◽

Design Spectrum ◽

Nonlinear Site Response ◽

Linear Behavior ◽

Seismic Design Code ◽

Wide Range

The site response analyzes provide an idea of the behavior of the soil against strong ground motions, involving a large number of variables that determine the non-linear behavior of the soil. Due to the complexity of these analyzes, in practice the effects of nonlinear soil behavior are incorporated factors that modify the seismic response of a response spectrum in rock (linear behavior). In this study, nonlinear site response analysis has been performed for 50 soil profiles in an attempt for covering a wide range of shear wave velocity profiles using the software DEEPSOIL V.7. For this purpose, 06 seismic records have been spectrally adjusted to uniform hazard spectrum of 475, 1000 and 2475 years of return period. Subsequently, a comparison of the results obtained from the site response analysis with the parameters stipulated in the Peruvian Seismic Design Code E.030 (2018) was made, in order to determine the likelihood of these for the construction of design spectra. Discrepancies in the ranges of Vs values that this standard considers for the classification of soils and the factors that determine the width of the plate of the design spectrum have been found.

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Vulnerability assessment of seismic induced out-of-plane failure of unreinforced masonry wall buildings

Canadian Journal of Civil Engineering ◽

10.1139/cjce-2016-0555 ◽

2017 ◽

Vol 44 (12) ◽

pp. 1045-1055 ◽

Cited By ~ 3

Author(s):

Ahmad Abo-El-Ezz ◽

Clémentine Houalard ◽

Marie-José Nollet ◽

Rola Assi

Keyword(s):

Vulnerability Assessment ◽

Seismic Vulnerability ◽

Response Spectrum ◽

Unreinforced Masonry ◽

Damage State ◽

Seismic Vulnerability Assessment ◽

Capacity Curve ◽

Plane Failure ◽

Out Of Plane ◽

Displacement Demand

Damage to unreinforced masonry (URM) buildings from earthquake shaking is often caused by out-of-plane failure of walls. This is particularly relevant to the majority of URM buildings in Eastern Canada that were constructed prior to the introduction of seismic design prescriptions. Seismic vulnerability assessment of this type of failure is therefore an essential step towards seismic risk mitigation. This paper presents a simplified procedure for seismic vulnerability assessment of out-of-plane failure of URM wall buildings. The procedure includes the development of an equivalent single degree of freedom model of the wall with a characteristic force–deformation capacity curve. The capacity curve is convolved with displacement response spectrum to predict the displacement demand. The predicted displacement demand is compared to displacement thresholds criteria corresponding to the initiation of each damage state. The procedure is applied to an inventory of URM buildings in Montreal and the corresponding probability of out-of-plane damage is evaluated.

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