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All Journal Inersia : Jurnal Teknik Sipil dan Arsitektur Teknisia Teras Jurnal Jurnal Karkasa Rancang Bangun Jurnal Rekayasa Sipil TAPAK (Teknologi Aplikasi Konstruksi) : Jurnal Program Studi Teknik Sipil International Journal of Engineering, Technology and Natural Sciences (IJETS) JURNAL TEKNIK SIPIL UNAYA
Nurhidayatullah, Eka Faisal
Universitas Teknologi Yogyakarta
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Korelasi Perilaku Struktur Bangunan Berdasarkan Parameter R, Cd dan Ω Terhadap Tingkat Kinerja pada Beragam Simulasi Gempa Nurhidayatullah, Eka Faisal; Kurniati, Dwi; Maradika, Samsul Ryandi
Jurnal Teknik Sipil Unaya Vol 8, No 2 (2022): Juli 2022
Publisher : Center for Research and Community Service (LPPM) University of Abulyatama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30601/jtsu.v8i2.2841

Abstract

This research was conducted by modeling the reinforced concrete structure according to the existing conditions. Nonlinear static pushover analysis was carried out by giving monotonous lateral static loads until the structure reached an inelastic nonlinear state which was known from its capacity curve. The frequent, rare and very rare earthquake scenarios are given to the building structure so that the level of performance is known. The performance of the simulated building for each earthquake level is correlated with the parameters R, Cd and Ω of the actual building structure. The parameter values of Ractual, Ωactual and Cdaktual represent the strength, stiffness and ductility of building structure are in good condition. The degradation of stiffness and strength due to an increase of base shear occurs faster when the earthquake acts at Y than X direction of building. Small, design and large earthquake simulations show immediate occupancy buildings’ performance level so that the structure is included in very good category. The presence of shear walls on all four sides of the building is suspected as the cause. Improving the quality of building structure performance can be done by modifying the structural parameters R, Cd and Ω. In existing buildings, can be done by retrofitting, adding shear walls, braces or passive control devices neither seismic dampers nor base isolation.
ASESMEN STRUKTUR DERMAGA TERHADAP POTENSI GELOMBANG, GEMPA DAN TSUNAMI Nurhidayatullah, Eka Faisal; Fajar, Muhammad Azis; Saputro, Cahyo Dita
Jurnal Karkasa Vol 10 No 2 (2024): Jurnal Karkasa - Desember 2024
Publisher : LPPM Politeknik Saint Paul Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32531/jkar.v10i2.880

Abstract

Gelombang, gempa dan tsunami yang berpotensi terjadi merupakan ancaman bagi infrastruktur dermaga. Kerugian yang ditimbulkan akibat kerusakan dermaga mencakup korban jiwa, kerugian ekonomi akibat gangguan distribusi logistik, biaya perbaikan struktur yang rusak, hambatan pendistribusian bantuan bagi para korban pada masa tanggap darurat dan pemulihan. Asesmen struktur dermaga diperlukan guna mengidentifikasi lebih dini apabila terdapat potensi kelemahan dermaga yang diakibat oleh beban gelombang, gempa atau tsunami sehingga diharapkan mampu mengurangi risiko serta kerugian. Beban gelombang dan tsunami diperhitungkan dengan metode lateral statik ekivalen dengan persamaan empiris fisika sesuai dengan ketentuan dan koefisien FEMA 55 & FEMA P646 sedangkan beban gempa diperhitungkan sebagai respons spektrum berdasarkan SNI 1726: 2019. Struktur dimodelkan secara tiga dimensi dengan perangkat lunak SAP 2000. Analisis struktur dikerjakan dengan metode statik dan dinamik linear. Hasil penelitian menunjukkan bahwa gaya dalam pada elemen struktur dermaga akibat pengaruh gaya gempa cenderung lebih besar apabila dibandingkan dengan gelombang serta tsunami. Perhitungan beban tsunami menggunakan metode lateral statik ekivalen dengan persamaan empiris fisika cenderung menghasilkan gaya yang relatif kecil sehingga kurang representatif. Rasio gaya dalam ultimit terhadap kapasitas penampang struktur menunjukkan nilai kurang dari satu pada seluruh elemen struktur dengan berbagai skenario kombinasi beban akibat pengaruh lingkungan. Simpangan lateral pada arah x dan y belum melampaui batas izin yang berarti bahwa kondisi struktur termasuk dalam keadaan baik.
Prediction of ground motion due to the influence of Nonlinear Soil Conditions using probabilistic approach Nurhidayatullah, Eka Faisal; Dwi Kurniati
Teknisia Vol 29 No 2 (2024): Teknisia
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknisia.vol29.iss2.art2

Abstract

Ground acceleration data plays an important role in obtaining accurate dynamic analysis results. This data is difficult to find in Indonesia. There is a need for a comprehensive study related to ground motion prediction by considering the condition of the soil that is able to change the acceleration which can significantly affect the building damage. The latest earthquake events and soil tests data need to be collected. Probabilistic analysis was performed to obtain the target spectra. The deaggregation analysis are used as a reference for collecting earthquake recording data. The spectral matching process is carried out according to the target spectra. Earthquake records with small errors to the target spectra are selected. Only ground motion that has the smallest deviations of acceleration, velocity, displacement, directivity and arias intensity to the original earthquake recording is used in non-linear site response analysis. Surface ground motion is obtained from the analysis of wave propagation from the bedrock to surface by considering the influence of onlinear parameters of the soil. The spectral response analysis at bedrock shows the acceleration value at 0.2 seconds period is 1.326g and 1 second period is 0.447g. Each year, the hazard is dominated with earthquakes magnitude from 6.97 to 7.23 Mw which occur in the range of 89 to 111 km with 22.20% percentage. Darfield, New Zealand ground motion from spectral matching results is the best ground motion recording that is most suitable when used at research area. Surface ground motion tends to amplify about 1.2 times.
Co-Authors Adwiyah Asyifah Djawa, Helmy Agustin Yohanes Dwi Kurniati Dwi Kurniati Dwi Kurniati Dwi Kurniati Dwi Kurniati Fajar, Muhammad Azis Firdaus, Lutfi Mirsa Maradika, Samsul Ryandi Mochamad Teguh Muhammad Firdaus Willy Pratama Samsul A Rahman Sidik Hasibuan Saputro, Cahyo Dita Saputro, Imam Trianggoro