Abstract
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.
Highlights
The city of Banda Aceh-Indonesia is founded on thick alluvium [1]
The spectral acceleration (SA), spectral displacement (SD), and acceleration-displacement response spectrum (ADRS) for class D seismic Site#1, Site#2, and Site#3 are presented in Figures 3 to 5
The right and left graphs of the figures reveal that the Proposed SA curves of this study suggest higher than PUSKIM at lower period and displacement
Summary
The city of Banda Aceh-Indonesia is founded on thick alluvium (soft soil) [1]. The city was hit by the mega earthquake in 2004 which caused severe damages to reinforced concrete (RC) buildings as shown in Figure 1 [2]. Estimated response spectral acceleration up to 0.8g was suggested by [3]. One of contributing factors to the damages can be an improper structural design of the affected buildings. This improper design causes the building performance capacity less than the forcedemand (seismic loading). The development in engineering knowledge allows an engineer to evaluate the performance of the building due to dynamic loading which is well known as performance-based engineering (PBE) method
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