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Author: search.filters.author.Mase, Lindung ZalbuinSubject: search.filters.subject.Ground response

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    The Joint Method of Ground Response and Structural Dynamic Analyses for Building Inspection Under a Large Megathrust Earthquake
    (2025-01-01)
    Mase, Lindung Zalbuin
    ;
    Gustina, Della
    ;
    Zahara, Annisa
    ;
    Supriani, Fepy
    ;
    Chaiyaput, Salisa
    This paper demonstrates the joint method of ground response and structural dynamic analyses for building inspection under a large megathrust earthquake for the sports education building at the University of Bengkulu, a structure in the earthquake-prone zone of Indonesia, and emphasises its practical implications. A thorough site investigation is conducted to determine soil penetration and resistance. The motion from the subduction earthquake scenario within 20 years is used for ground response. The acceleration time history at the foundation-based layer is used for structural dynamic analysis. The weak structures are inspected based on over-strength conditions and stress ratio. The weak structures are treated using retrofitting methods to increase the accommodated load capacity. A structural dynamic analysis is then conducted to check the structure’s condition. The results showed that the seismic propagated wave could amplify at a weak layer. Therefore, careful consideration of the pile tip and the quality of structural materials plays a vital role in structural performance. The results show that the retrofitting method indicates an improvement in structural performance. With its practical implications, the joint method implemented in this study plays a crucial role in enhancing the safety and resilience of structures in earthquake-prone areas.
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    Analysis of ground response and potential seismic damage to sites surrounding Cimandiri Fault, West Java, Indonesia
    (2023-12-01)
    Mase, Lindung Zalbuin
    ;
    Somantri, Andri Krisnandi
    ;
    Chaiyaput, Salisa
    ;
    Febriansya, Aditia
    ;
    Syahbana, Arifan Jaya
    Cimandiri Fault in West Java is one of the active faults in West Java, Indonesia. The activity of the fault could potentially result in damage to the surrounding areas. This paper presents a study of ground response analysis and the potential seismic damage to structures in sites surrounding the Cimandiri Fault. The site investigation data are collected. Furthermore, ground motion prediction is conducted. To estimate the potential damage, the potential seismic damage is performed. The spectral matching method determines artificial ground motion represented by the investigated sites. The seismic ground response analysis is conducted to observe ground motion parameters and soil response. The results show that the prediction of damage intensity level in the study area is about Scale VIII at maximum. The site amplification during seismic response is observed to vary from 1.4 to 2.7. The results also show that spectral acceleration design is still reliable in covering the effect of spectral acceleration amplification. However, the results also indicate that the trend of spectral acceleration shows that the amplification generally occurs at a medium-long period. It implies that the resonance effect may occur in medium-high-rise buildings.