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All Journal Jurnal Konstruksia Teknisia Civil Engineering Journal
Widodo Pawirodikromo, Widodo
Program Magister Teknik Sipil, Universitas Islam Indonesia (UII), Daerah Istimewa Yogyakarta, Indonesia
Civil Engineering, Building, Construction & Architecture Engineering Transportation

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Comparison of Structural Response Utilizing Probabilistic Seismic Hazard Analysis and Design Spectral Ground Motion Pranowo, .; Makrup, Lalu; Pawirodikromo, Widodo; Muntafi, Yunalia
Civil Engineering Journal Vol 10 (2024): Special Issue "Sustainable Infrastructure and Structural Engineering: Innovations in
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-SP2024-010-012

Abstract

Indonesia is seismically active due to tectonic plate convergence south of Java Island. In the examination of earthquake-resistant structures, Indonesia possesses the SNI 1726-2019 rule; however, it requires re-evaluation in conjunction with other seismic motions, specifically the PSHA method. The PSHA approach is employed in probability-based seismic hazard analysis, taking into account uncertainties related to earthquake magnitude, location, and frequency to provide a comprehensive assessment of a location's hazard level. To demonstrate the impact of ground motion induced by earthquakes on structural reaction, it is essential to study the structure using the time history of SNI and PSHA artificial earthquake shaking. Spectrum matching with target spectra derived from probabilistic seismic hazard analysis can build artificial time histories. Consequently, the time history obtained from the analysis can be considered to be derived from the probabilistic methodology. Both analytical methods, SNI and PSHA, indicate that the structural reaction of the Alana Hotel is not markedly different, and the structure remains secure against seismic activity. Doi: 10.28991/CEJ-SP2024-010-012 Full Text: PDF
PENGURANGAN RISIKO BENCANA ALAM GEMPA BUMI SEBAGAI UPAYA UNTUK MELAKSANAKAN RISK-BASED EARLY WARNING Pawirodikromo, Widodo
Teknisia Vol. XX, No. 1, Mei 2015
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

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Abstract

The occurrence of natural hazards and disasters in general can not be avoided, and accordingly, the best way to overcome is to carry out an effective disaster management. The disaster management cycle has been defined and understood clearly.One of the main problem especially in the earthquake occurrence is the method of early warning. Semi quantitative investigation on the earthquake occurrences particularly at Yogyakarta province has been conducted. The relationship between earthquake occurrence and an effective early warning became the main discussion. The data of earthquake occurrence at Yogyakarta provinve in general is still relatively limited. The only available data was started at 1960’s and therefore for the purpose of earthquake forecasting and prediction, the numbers/completeness of the data should be improved. Result of the investigation showed that the concept of early warning system will be more comprehensive if it be conducted by using the principle of Risk-Based Early Warning. Reducing the disaster fatalities can be done not only by carrying out an  early warning immediately before hazard but also can be extended inclusively in the disaster risk reduction program. Based on preliminary investigation and experiences, the structural damage at Yogukarata province would be occur if the shallow earthquake magnitude M is greater than  5.3 with the epicenter distance approximately less than 40 km. There are several earthquake prediction methods that have been developed by researchers, and one of them is strange animal behavior before earthquake. The strange animal behaviors were occurred before the Yogyakarta 27 May 2006 earthquake. This method can be used for the earthquake early warning in the future when it has been verified successfully.
Respons Inelastik Struktur Bangunan Gedung Bertingkat 3-Dimensi Akibat Gerakan Tanah Berdasarkan Probabilistic Seismic Hazard Analysis Rahayu, Pranowo; Pawirodikromo, Widodo; Makrup, Lalu; Muntafi, Yunalia
Konstruksia Vol 16 No 2 (2025): Jurnal Konstruksia Vol 16 No. 2 Tahun 2025
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jk.16.2.83-96

Abstract

Indonesia wilayah yang sangat rentan terjadinya gempa bumi, pada 20 tahun terakhir banyak kejadian gempa yang menyebabkan kerusakan bangunan dan kerugian harta benda juga nyawa. Tercatat paling sedikit korban jiwa sebanyak 295,306 sungguh hal ini sangat memprihatinkan. Untuk mengurangi jumlah korban jiwa akibat runtuhnya bangunan gedung maka para engineer teknik sipil haruslah menguasai tata cara bagaimana mendesain struktur bangunan yang tahan terhadap goncangan gempa bumi. Keterbatasan data rekaman di Indonesia menjadi tantangan tersendiri, sehingga perlu adanya rekayasa gerak tanah buatan dengan metode probabilistik hal ini tentunya sangat membantu sekali untuk mendesain ataupun mengasesment bangunan yang sudah ada dan diharapkan respon-respon inelastik yang terjadi dapat mengukur sejauh mana bangunan dapat tetap berdiri ketika dikenakan beban gempa dengan besaran tertentu. Analisis Probabilistik melibatkan data-data yang terkait kejadian gempa pada masa lampau di wilayah Yogyakarta sehingga setelah melalui proses perhitungan didapati respons spectra target. Hasil analisis deagregasi menunjukan besaran gempa yang dominan 5.8 Mw dengan jarak 18.057 km dan didominasi sumber gempa patahan Opak. Hasil analisis menunjukan struktur bangunan mendekati keruntuhan (Near Collapse), hal ini ditandai dengan nilai Storey drift. Respons hysteretic loop menunjukkan lingkaran yang besar berarti redaman struktur berjalan baik sesuai yang diharapkan. Pada indeks kerusakan hal ini pun menunjukan 0.952 kurang dari 1 maka tingkat kerusakan berdasarkan klasifikasi Park dan Ang (1985) masuk kategori Severe Damage kerusakan yang parah (beton hancur, tulangan terlihat) ini berarti bangunan tidak dapat diperbaiki atau mendekati keruntuhan senada dengan hasil dari story drift ratio.
Inelastic Response of Fixed and Flexible Foundation of Structure Under Seismic Excitations Generated Deterministically Pranowo; Pawirodikromo, Widodo; Makrup, Lalu; Muntafi, Yunalia
Civil Engineering Journal Vol. 11 No. 8 (2025): August
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2025-011-08-024

Abstract

Researchers performed inelastic dynamic analysis on simulated ground motion while accounting for foundation flexibility in the specific area of Yogyakarta. The closest fault source to the building site is the Opak Fault, situated 2.1 kilometers from the structure. The closeness to the fault source, which suggests an exceedingly high earthquake magnitude, prompted the use of deterministic analysis. Deterministic analysis used five Ground Motion Prediction Equations (GMPEs): Campbell-Bozorgnia (2006), Sadigh et al. (1997), Ciao-Youngs (2008), Zhao et al. (2006), and Kanno et al. (2006), while the flexibility of the foundation was evaluated using the formula proposed by Novak (1989). The analysis results show that the vibration period that occurs on the flexible support is 2.8 seconds, while on the fixed support it is 2.4 seconds. Deflections and drift ratios in structures with fixed support and high-frequency content are greater, but in beam curvature the results show the opposite, namely, low-frequency content produces larger curvature values. The damage index on the fixed support and high-frequency content is greater than the others. Not much research has looked into the results of inelastic response analysis that includes hysteretic loop outputs and damage indices, making this a new area of study.
Co-Authors Makrup, Lalu Muntafi, Yunalia Pranowo Pranowo, . Rahayu, Pranowo