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      Analisis Kinerja Struktur Shelter (Escape Building) terhadap Beban Gempa dan Tsunami dengan Analisis Pushover

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      Date
      2025
      Author
      Puspita , Ridwan Adriansyah
      Putra, Heriansyah
      Mentari, Sekar
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      Abstract
      Wilayah pesisir selatan Jawa, khususnya Kecamatan Palabuhanratu, berisiko menghadapi tsunami akibat megathrust dengan ketinggian 12-20 meter. Dengan kepadatan penduduk 119.347 jiwa dan aktivitas pariwisata tinggi diperlukan shelter permanen yang memenuhi standar ketahanan terhadap gempa dan tsunami. Penelitian ini bertujuan mendesain dan menganalisis struktur shelter beton bertulang dengan metode pushover analysis berdasarkan displacement coefficient method (DCM) serta simulasi inundasi tsunami 10 m, 15 m dan 20 m. Hasil penelitian menunjukkan bahwa struktur memenuhi kontrol parameter terhadap gempa dan tsunami sesuai SNI 1726:2019 dan FEMA P-646 dengan partisipasi massa >90% dan simpangan antar lantai dalam batas izin. Struktur mencapai level Immediate Occupancy (IO) dengan sendi plastis terbentuk pada balok sebelum kolom. Kekakuan lebih tinggi pada arah y dengan target perpindahan 114,596 mm (y) dan 135,918 mm (x), menunjukkan daktilitas lebih besar pada arah x. Beban tsunami meningkatkan simpangan antar lantai terutama pada lantai bawah seiring kenaikan tinggi gelombang. Inundasi 20 m menyebabkan simpangan lantai 1 hingga 3 melampaui simpangan akibat gempa. Hantaman puing memperbesar deformasi, terutama di bagian bawah struktur.
       
      The southern coast of Java, particularly Palabuhanratu District, is at risk of a tsunami triggered by a megathrust, with wave heights ranging from 12 to 20 meters. With a population of 119,347 and high tourism activity, a permanent shelter that meets earthquake and tsunami resistance standards is essential. This study aims to design and analyze a reinforced concrete shelter using pushover analysis based on the Displacement Coefficient Method (DCM), along with tsunami inundation simulations of 10 m, 15 m, and 20 m. Results show the structure meets seismic and tsunami requirements based on SNI 1726:2019 and FEMA P-646, achieving Immediate Occupancy (IO) level with >90% mass participation and allowable inter-story drifts. The structure is stiffer in the y-direction, while higher ductility is observed in the x-direction. Tsunami loads increase lower-story drifts, with 20 m inundation causing drift values to exceed seismic demands. Debris impact further intensifies deformation at the lower levels.
       
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      http://repository.ipb.ac.id/handle/123456789/161630
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      • UT - Civil and Environmental Engineering [1042]

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      Copyright © 2020 Library of IPB University
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      Indonesia DSpace Group 
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