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      Assessment of seismic vulnerability index of RAJUK area in Bangladesh using microtremor observations

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          Abstract

          Abstract Microtremor Horizontal to Vertical spectral ratio technique, also known as the Nakamura’s method is growing in status for site response analysis. 500 locations in RAJUK area (1530 km2) have been selected for microtremor observations. Microtremor data have been compiled and studied to estimate the predominant resonance frequency and H/V peak amplitude following the SESAME (2004) guideline. Finally, seismic vulnerability index of site soil using Nakamura’s technique has been determined from predominant resonance frequency and H/V peak amplitude parameter. The calculated seismic vulnerability index for the studied 500 locations varies between 0.16 and 7.28. The low seismic vulnerability index (Kg) value means that the areas are relatively stiff and underlain by substantial deposit of sediments. The relatively higher Kg values are spread in the soft alluvial deposit areas. The areas with high Kg values are considered as fragile zones that may initiate significant damage to infrastructure situated in those areas during an earthquake.

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          Most cited references25

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          InSAR measurements of compaction and subsidence in the Ganges-Brahmaputra Delta, Bangladesh

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            On the Amplitude Characteristics of Microtremor (Part 2)

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              On the use of microtremor recordings in seismic microzonation

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                Author and article information

                Journal
                soiroc
                Soils and Rocks
                Soil. Rocks
                Associação Brasileira de Mecânica dos Solos (São Paulo, SP, Brazil )
                1980-9743
                2675-5475
                2021
                : 44
                : 2
                : e2021057420
                Affiliations
                [01] Dhaka orgnameRajdhani Unnayan Kartripakkha orgdiv1Urban Resilience Project Bangladesh
                [02] Dhaka orgnameBangladesh University of Engineering and Technology orgdiv1Department of Civil Engineering Bangladesh
                Article
                S2675-54752021000200600 S2675-5475(21)04400200600
                10.28927/sr.2021.057420
                4ccbd0df-b04b-4dbb-97df-0540d4cff683

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 06 September 2020
                : 16 April 2021
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 29, Pages: 0
                Product

                SciELO Brazil

                Categories
                Case Study

                Frequency,H/V peak amplitude,H/V spectral ratio,Nakamura technique,Seismic vulnerability index

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