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All Journal PROSIDING SEMINAR NASIONAL Inersia : Jurnal Teknik Sipil dan Arsitektur MEDIA KOMUNIKASI TEKNIK SIPIL Jurnal Teknik Sipil Jurnal Teknik Sipil dan Perencanaan Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil TAPAK (Teknologi Aplikasi Konstruksi) : Jurnal Program Studi Teknik Sipil Community Development Journal: Jurnal Pengabdian Masyarakat CRANE: Civil Engineering Research Journal Aceh International Journal of Science and Technology
Togani Cahyadi Upomo, Togani Cahyadi
Jurusan Teknik Sipil, Fakutas Teknik, Universitas Negeri Semarang,
Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Health Professions Mechanical Engineering Public Health Transportation

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PENILAIAN LIKUIFAKSI DENGAN PENGUJIAN TRIAKSIAL TERKONSOLIDASI-TAK TERDRAINASE Upomo, Togani Cahyadi; Kusumawardani, Rini; Nugroho, Untoro; Kusbiantoro, Arief; Firdaus, Muh Arief; Syahputra, Muhammad Farhan
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol. 29 No. 1 (2024): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v29i1.5663

Abstract

This study discusses the assessment of liquefaction by triaxial consolidated undrained (CU) testing. The soil sample employs Rembang silica sand with a grain size distribution that lies within the zone of liquefaction. In the test, Liquefaction develops in sand when the ratio of the change in pore water pressure to its confining stress (Ru) turns approximately 1 and the deviator stress drops to approximately zero. According to the findings, loose to medium-dense sand experience liquefaction when the applied confining stress is low (<100 kPa). In sandy soils, limited liquefaction occurs at confining pressures of 200 − 400 kPa with the range of relative densities around 34.41% − 47.78%. Critical state line develops from Triaxial CU testing to predict the undrained and drained behavior of sand.
Structural Health Monitoring by Identification Dynamic Properties and Load Rating Factor at Multi-span Prestressed Concrete Girder Bridge Kusumawardani*, Rini; Kusbiantoro, Arief; Nugroho, Untoro; Upomo, Togani Cahyadi; Novita, Erlia Dewi; Nugroho, Imam Agus; Azizah, Kirana Prasetya
Aceh International Journal of Science and Technology Vol 12, No 3 (2023): December 2023
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.12.3.34451

Abstract

It is crucial to perform routine bridge maintenance in order to evaluate the structure's current state. As a result, it is possible to guarantee that the bridge structure can offer services that are both comfortable and secure. The bridge structure being able to reach the service life as planned is another goal that can be accomplished. Visual inspection or the use of some currently popular sensors can be used to monitor the condition of the bridge. The dynamic properties of a structure including modal frequency and mode shape will be used to determine the structure's present and potential future conditions. Using a velocitymeter, vibration data collection is conducted as the first step. The next step is analyzing data to determine natural frequency. The fundamental frequency of the Tugu Suharto bridge structure in Semarang was determined to be 3.995 Hz. Future bridge structure condition monitoring can be done using frequency data and finite element model. The condition of bridge infrastructure in the future for one city is an important thing that must be considered. Some bridges are classified as structurally deficient, and many bridges are nearing the end of their design lives. The next generation of Semarang highway bridges is currently being designed and built, but existing bridges still need to be maintained through proper inspection and load rating. In order to incorporate structural modeling, instrumentation, and nondestructive testing into the design, construction, and management of bridges, this study proposes an objective load rating protocol. Using information gathered from structural health monitoring (SHM), a baseline structural model is developed and verified. The load rating factors of the bridge are then determined using the structural model under both real-condition and simulated damaged conditions.
SOSIALISASI PENINGKATAN KUALITAS BIJI KOPI PADA DESA MEDONO KECAMATAN BOJA KABUPATEN SEMARANG Upomo, Togani Cahyadi; Nugroho, Untoro; Kusbiantoro, Arief; Kusumawardani, Rini; Subiantara, Muhammad Ilham; Kharisma, Anindya Batari; Amelia, Naswa Badi
Community Development Journal : Jurnal Pengabdian Masyarakat Vol. 5 No. 5 (2024): Vol. 5 No. 5 Tahun 2024
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/cdj.v5i5.35325

Abstract

Desa Medono terletak di kabupaten Kendal, provinsi Jawa Tengah. Umumnya, mayoritas penduduk Desa Medono bekerja di kebun dan menanam lahannya dengan tanaman kopi. Sayangnya, masyarakat Desa Medono memiliki pengetahuan yang terbatas terkait dengan penanaman, pengolahan dan pemasaran biji kopi. Hal tersebut mengakibatkan kopi di Desa Medono kurang berkembang dibanding dengan di daerah lainnya seperti Temanggung. Teknik sipil UNNES berkolaborasi dengan aktivis kopi melakukan penyuluhan dan bimbingan dalam penanaman, pengolahan maupun pemasaran biji kopi dengan harapan dapat meningkatkan kualitas dan harga jual biji kopi produk Desa Medono sehingga pendapatan masyarakat Desa Medono semakin meningkat. Selama kegiatan, masyarakat petani kopi di Desa Medono cukup antusias dan aktif berdiskusi dengan tim Teknik Sipil UNNES dan aktivis kopi
ANALISIS CRITICAL STATE LINE DAN INSTABILITY LINE PADA PASIR PETOBO DENGAN KANDUNGAN LANAU 10% BERDASARKAN PENGUJIAN TRIAXIAL CONSOLIDATED UNDRAINED Latifah Arub Ambarwati; Togani Cahyadi Upomo; Muhammad Ilham Subiantara; Elisa Yuliana; Nila Puspitasari; Adita Narotama; Rizki Heryanto; Lintang Namira Salsabila Andini; Fabian Neopasha Ferdinand Putra
CRANE: Civil Engineering Research Journal Vol 7 No 1 (2026): CRANE - APRIL
Publisher : Program Studi Teknik Sipil, Fakultas Teknik dan Ilmu Komputer, Universitas Komputer Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34010/crane.v7i1.19720

Abstract

This study investigates the mechanical behaviour and instability characteristics of Petobo sand containing 10% silt within the framework of Critical State Soil Mechanics (CSSM). Laboratory testing was conducted employing consolidated undrained (CU) triaxial tests on remolded specimens with varying relative densities after consolidation (Dr,c = 22.65–50.39%) and effective confining pressures (σ′₃ = 100–400 kPa). The analysis focused on stress–strain response, excess pore water pressure generation, and effective stress path evolution to identify the positions of the Critical State Line (CSL) and Instability Line (IL). The results show that all specimens exhibit contractive behaviour accompanied by strain softening after peak strength. The peak deviator stress increased from 18.57 kPa under very loose conditions to 103.48 kPa at higher relative density and confining pressure, indicating a significant influence of density state and effective stress level on shear resistance. Effective stress path analysis reveals that instability occurs prior to reaching the CSL, as indicated by a sharp reduction in deviator stress after the stress path crosses the Instability Line. The obtained IL slope is consistently lower than the CSL slope, with its position influenced by relative density conditions. Furthermore, increasing relative density not only enhances shear strength but also reduces the extent of the potential instability zone in the p′–q stress space. These findings provide new experimental insight into the instability behaviour of Petobo silty sand and contribute to a better mechanistic interpretation of flowslide phenomena in the field.
Simulasi Kenaikan Tekanan Air Pori Akibat Beban Timbunan Saat Fase Konstruksi Pembangunan Tanggul Upomo, Togani Cahyadi; Aryanti, Dian Eka; Kusumawardani, Rini
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 28, Nomor 2 (2022)
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v28i2.42215

Abstract

Inflow in Jatiluhur Reservoir located on the Citarum River is influenced by outflow from Cirata Reservoir and Saguling Reservoir which are above it. These three reservoirs are incorporated in the Citarum Cascade System Reservoir. This inflow analysis is related to the availability of water in the Jatiluhur Reservoir, which is a multi-purpose reservoir, which then becomes the mainstay of the water supply as a hydropower operation pattern. Runoff rain modeling using HEC-HMS software using data on rainfall, temperature, land cover, soil type and topography. Parameters generated from observation and modeling are coefficient of determination (R2), Nash-Stuclift (NSE), and Percent Bias (PBIAS). The results of the case study show that the parameters of the observed local inflow (R2: 0.693; NSE: 0.525; PBIAS: 9.88%) with data sources from the Jatiluhur Reservoir manager are better than the local inflow analysis results (R2: 0.533; NSE: - 0.457; PBIAS: 48.88%) with data sources from water level (TMA). Meanwhile, the total inflow of observations (R2: 0.982; NSE: 0.973; PBIAS: 1.14%) with data sources from the Jatiluhur Reservoir manager is better than the total inflow analysis results (R2: 0.932; NSE: 0.889; PBIAS: 9.43 %) with the data source from the water level (TMA).
BANTUAN TEKNIS PEMBUATAN SALURAN PEMBUANGAN AIR LIMBAH (SPAL) DESA PLALANGAN Togani Cahyadi Upomo; Nuraida Nuraida; Alfa Narendra; Alfita Ilyaningrum; Raysefo Hedian; Muhammad Farhan S; Muhammad Farhan
Community Development Journal : Jurnal Pengabdian Masyarakat Vol. 6 No. 4 (2025): Volume 6 No 4 Tahun 2025
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/cdj.v6i4.48603

Abstract

Desa Plalangan yang terletak di Kecamatan Gunungpati, Kota Semarang, Provinsi Jawa Tengah, masih menghadapi permasalahan sanitasi lingkungan, khususnya dalam pengelolaan air limbah rumah tangga. Berdasarkan hasil survei dan observasi lapangan, wilayah ini diketahui belum memiliki saluran pembuangan air limbah (SPAL) yang layak. Air limbah rumah tangga dibuang langsung ke tanah tanpa pengolahan, sehingga berpotensi mencemari lingkungan dan meningkatkan risiko penyebaran penyakit. Melalui kegiatan Pengabdian kepada Masyarakat, Program Studi Teknik Sipil Universitas Negeri Semarang (UNNES) berupaya merancang dan membangun SPAL yang sesuai dengan kondisi serta kebutuhan masyarakat setempat. Tujuan utama kegiatan ini adalah untuk meningkatkan kualitas sanitasi dan kesehatan lingkungan. Selain memberikan solusi teknis, kegiatan ini juga diharapkan dapat meningkatkan kesadaran masyarakat akan pentingnya pengelolaan air limbah yang berkelanjutan.
Co-Authors Adita Narotama Agung Sutarto Ahmad Fahrul Lafit Ahmad Jirjisul Ba'ist Alfa Narendra Alfita Ilyaningrum Amelia, Naswa Badi Aryanti, Dian Eka Azizah, Kirana Prasetya Ba'ist, Ahmad Jirjisul Elisa Yuliana Fabian Neopasha Ferdinand Putra Firdaus, Muh Arief Hari Dwi Wahyudi Henry Apriyatno Kharisma, Anindya Batari Kusbiantoro, Arief Kusumawardani*, Rini Latifah Arub Ambarwati Lintang Namira Salsabila Andini Muhammad Farhan Muhammad Farhan S Muhammad Ilham Subiantara Nila Puspitasari Novita, Erlia Dewi Nugroho, Imam Agus Nuraida Nuraida Raysefo Hedian Rini Kusumawardani, Rini Rizki Heryanto Subiantara, Muhammad Ilham Syahputra, Muhammad Farhan Untoro Nugroho Untoro Nugroho Yeri Sutopo