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RESPON STRUKTUR BETON GEDUNG APARTEMEN DAN PERKANTORAN 20 LANTAI AKIBAT BEBAN GEMPA DENGAN MENGGUNAKAN METODE RESPON SPEKTRUM Kusbiantoro, Arief; Kusumawardani, Rini; Nugroho, Untoro; Sutarto, Agung; Dzikri, Muhammad Aidhil; Nugraha, Moh Ari Restian; Yus, Rakha Alfarizhi; Indonesia, Bisma Garda; Furqon, Septindra Hafizh Al; Firdaus, Nisqiyah; Khanza, Mirara
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.v29i1.5837

Abstract

A 20-story building located in Bandung, with a height of 70.5 m, functions as both an office building and an apartment complex. As a high-rise structure, seismic analysis of the building is required to determine the seismic pattern using the response spectrum method. The response spectrum method is used to compare V-static with Vdynamic based on SNI 1726-2019, and to determine the structural performance of the 20-story building frame. The results obtained for each frame using a combination of cases (static + seismic) show that, for displacement review, the highest shift occurs on the 20th floor at 1003.27 mm, and the highest drift value is on the 9th floor at 125.92 mm. The internal forces on the sample column show the highest results on the 5th-floor column C1 with 1.07x105 kN for Fx, 1.95x103 kN for Fy, and a moment of 5.44x103 kN-m, through the combination (static + seismic). Meanwhile, for the reviewed beam forces, the highest values are found on beam B53 on the 6th floor with an Fx value of 80.23 kN, Fy of 3140.53 kN, and the largest moment on the 15th-floor beam B53 of 793.46 kN-m.
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.
Assessment of Frequency on Railway Sleeper by Field Measurements and Static Analysis Kusumawardani, Rini; Kusbiantoro, Arief; Ermansyah, Naufal Maulana; Andiyarto, Hanggoro Tri Cahyo
Jurnal Teknik Sipil dan Perencanaan Vol 24, No 2 (2022)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v24i2.43253

Abstract

The train is a mode of mass transportation that is fast, efficient, and relatively affordable. To support the high demand for this mode of transportation, adequate infrastructure is also needed. The condition of this infrastructure must always be monitored so that the level of security and safety of rail transportation modes can always be in optimal conditions. One important component that requires regular attention and maintenance is the railway sleepers. In this paper, a finite element (FE) model was made of railway sleepers using ANSYS software. From the analysis on the FE model, it can be explored that the deformation and stress that occurs in the railway due to loading. In this study, vibration tests were also carried out on railway based on several types of passing trains. It aims to determine the frequency value based on the type of passing train. This research is the initial stage of a series of studies on structural health monitoring procedures on railroads.
Penerapan Alat Peniris Minyak Sentrifugal untuk Meminimalkan Kandungan Minyak pada Berbagai Macam Olahan Makanan pada Usaha Kecil Kuliner di Kelurahan Sekaran Gunungpati Semarang Widjanarko, Dwi; Kusumaningtyas, Ratna Dewi; Yudiono, Heri; Kusumawardani, Rini; Widyastuti, Catur Rini
Jurnal Pengabdian Magister Pendidikan IPA Vol 7 No 4 (2024): Oktober-Desember 2024
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v7i4.9574

Abstract

Sekaran is a fairly densely populated area because it is located around the Semarang State University campus. With this dense population, culinary businesses around Sekaran are also growing. Many culinary businesses produce fried foods of various types. The problem encountered in this culinary business is that there is still a lot of oil content in the food products. This of course can harm the health of consumers. The aim of this activity is to reduce the oil content in food. The solution used is to apply an oil drainer to food products produced by culinary businesses around Sekaran. The activities carried out include: providing an understanding of the dangers of food that contains a lot of oil, providing an explanation of how to drain oil from food quickly, and providing training in the use of a drainer. The results of the activities that have been carried out are 1) providing an explanation of the function of each part of the drainer. oil in food; 2) socialize the importance of reducing the oil content in fried foods; 3) education about the effects caused by the presence of oil in food; and 4) training on how to use tools to drain oil from food has been carried out through demonstrations of tool use.
Pengembangan Sektor Pariwisata dan Pemberdayaan Masyarakat di Desa Tunggulsari, Kabupaten Pati Lili Marliyah; Marhaeni Dwi Satyarini; Merli Apriyantika; Tjaturahono Budi Sanjoto; Rini Kusumawardani; Danang Dwi Saputro; Moch Faizal Rachmadi; Jati Wahyu Arisetiawan; Alifta Lutfiaazahra
Jurnal Pengabdian Magister Pendidikan IPA Vol 7 No 4 (2024): Oktober-Desember 2024
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v7i4.9714

Abstract

Tourism is one of the sectors that plays an important role in foreign exchange earnings and increasing the national economy. Indonesia has a diversity of geographical, demographic and topographic conditions that have great potential in the tourism sector. One of the areas in Indonesia with a myriad of abundant tourism potential is Tunggulsari Village, Pati Regency. This area is a disaster-prone area because it borders directly on the Java Sea. However, the potential of the tourism sector, the expanse of the mangrove area and the fisheries and fisheries sectors make it a potential village. The purpose of this service is to make efforts to develop the tourism sector in Tunggulsari Village in a comprehensive, appropriate, targeted, sustainable and sustainable manner. In addition, community empowerment efforts also aim to improve the quality of human resources. This community service is carried out through methods of socialization, training, application of technology, mentoring and evaluation as well as program sustainability. The results of the service are to increase the competence of human resources massively in collaboration with the local government, conducting various training, counseling, mentoring, socialization and interactive discussions between the service team and partners. In addition, IPTEKS downstream efforts are also given to partners as a form of integrated tourism area development.
Feasibility Study on the Use of Fly Ash and Bottom Ash as Aggregate Substitutes in  the Subbase  Layer of Road Pavement M Arief Firdaus; Rini Kusumawardani; Nirima Ramadhani; Zahra Aulia Putri
Jurnal Teknik Sipil dan Perencanaan Vol. 26 No. 1 (2024): Jurnal Teknik Sipil dan Perencanaan
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v26i1.27690

Abstract

This study used fly ash and bottom ash (FABA) waste as a substitute for aggregate in the road subbase layer. The initial mixture included FABA with a depth of 1 meter and 7 meters without mixing other materials. This mixture is differentiated into two variations with a ratio of variation I (70:30) and variation II (70:30), each fermented for 14 days. The test results showed that the FABA material did not meet the specification of SNI 6388:2015 for class B foundation layers, with a maximum immersion CBR value of 25.32% in variation I and 18.99% in variation II. This study evaluates the feasibility of using FABA as an aggregate substitute material in the subbase layer of road pavement. From the results obtained, FABA material has the potential to be used in subbase construction. Still, adding other materials such as cement or lime is necessary to increase the carrying capacity and meet the set specifications
Analysis and Monitoring of Land Subsidence Phenomena in Tambak Lorok, Semarang City Using the In-sar Method Fadhila Tiara A; Rini Kusumawardani
Jurnal Teknik Sipil dan Perencanaan Vol. 26 No. 1 (2024): Jurnal Teknik Sipil dan Perencanaan
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v26i1.27692

Abstract

Rapid urbanization and infrastructure expansion in Semarang, particularly in the northern coastal areas, have led to significant land subsidence. Tambak Lorok, located in Tanjung Mas Sub-district, is among the affected areas, with key contributing factors including soft young alluvial soils, excessive groundwater extraction, infrastructure loads, coastal sediment dynamics, and tidal fluctuations. To understand the patterns and rates of land subsidence, this study employs the Interferometric Synthetic Aperture Radar (InSAR) method using the  Sentinel Application Platform (SNAP). The methodology involves the analysis of Sentinel-1A satellite imagery (2020–2024), Digital Elevation Model (DEM) mapping, and examination of changes in watershed (DAS) areas. Additional data were gathered through local community interviews and analysis of Google Maps and DEM data from 2018–2024. Long-term InSAR monitoring reveals that certain areas in North Semarang's coastal zone are subsidining at rates between -0.16 to -0.23 meters per year. Data validation was conducted through triangulation to ensure result accuracy. These findings highlight the need for more effective mitigation strategies, such as stricter groundwater management, adaptive infrastructure upgrades, and spatial planning that considers subsidence risks. Furthermore, remote sensing technology should be complemented with ground-based monitoring to ensure more accurate and data-driven mitigation strategies. The outcomes of this research are expected to serve as a basis for disaster mitigation and sustainable coastal spatial planning
Interpretation of Subgrade Conditions Beneath Flexible and Rigid Pavement Layers Using Ground Penetrating Radar (GPR) Detria Ardhila Kumala Sari; Rini Kusumawardani
Jurnal Teknik Sipil dan Perencanaan Vol. 26 No. 1 (2024): Jurnal Teknik Sipil dan Perencanaan
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v26i1.27694

Abstract

Ground Penetrating Radar (GPR) is a device commonly utilized in non-destructive testing (NDT) applications. Its principal advantage lies in its non-invasive nature, allowing for subsurface exploration without causing damage to existing structures or the surrounding environment. Due to this characteristic, GPR has become a leading technology in subsurface investigation. GPR is regarded as an optimal solution for rapidly and efficiently assessing subsurface conditions without inflicting damage on the pavement surface. In this research, GPR technology is employed to analyze the subgrade layers beneath flexible (asphalt) and rigid (concrete) pavements, with the objective of enhancing the effectiveness and sustainability of road maintenance strategies. The data acquisition process is supported by the GAS XPC software for field data recording, while data processing is conducted using GPRSoft and GSSI RADAN 7. A comparison between raw and processed data reveals distinctions that facilitate a more in-depth analysis. Furthermore, discrepancies in data interpretation were observed between the outputs of GPRSoft and GSSI RADAN 7. These differences serve as valuable references for refining data analysis methods and improving the accuracy and reliability of future GPR-based investigations
Interpretation  of Ground Penetrating Radar (Gpr) to Determine the Depth of Pipe Objects in the Sandbox Dwi Sri Wahyudi; Rini Kusumawardani
Jurnal Teknik Sipil dan Perencanaan Vol. 26 No. 1 (2024): Jurnal Teknik Sipil dan Perencanaan
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v26i1.27698

Abstract

Ground Penetrating Radar (GPR) is a non-destructive inspection technology that utilizes electromagnetic (EM) waves to map subsurface structures. This study focuses on estimating the diameter and depth of buried cylindrical objects, especially pipes, using GPR. This research was carried out through laboratory experiments using a box filled with dry sand. GPR data is processed using matGPR software to analyze hyperbolic reflections generated by buried objects. matGPR is software used for mathematical calculations of all three software. The speed of the EM wave is calculated based on the dielectric properties of the sand, and the depth and diameter of the pipe are estimated using a mathematical model derived from hyperbolic reflection. The results showed that the pipe depth estimate had a low error percentage, generally below 5%, which indicated high accuracy in GPR measurements, pipe A showed an estimated depth of 16.2 cm with the result obtained an error percentage of 1.8%, pipe B showed an estimated depth of 15.3 cm with the result obtained an error percentage of 1% and pipe C showed an estimated depth of 13.7 cm with the result obtained The error percentage is 2.2 %.The study concludes that GPR is an effective tool for estimating the depth of buried objects, especially in a controlled environment such as a sandbox. However, factors such as burial depth, pipe material, and dielectric properties of the medium can affect the accuracy of the measurement. Future research should consider using varied pipe materials and deeper burial depths to further validate the reliability of this method under field conditions.
The Implementation of a Project-Based Learning Jobsheet in Teaching Electrical Systems of Light Vehicle Bodies Afindala, Ajib; Anis, Samsudin; Kusumawardani, Rini
Journal of Vocational and Career Education Vol. 10 No. 1 (2025): July 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jvce.v10i1.30882

Abstract

One of the challenges faced in the recent learning process is that students have low psychomotor competency in learning job sheets related to the electrical systems of light vehicle bodies, such as in the lighting system, power window, sign lamp system, mirror cleaning system, and AC system. The use of unengaging job sheets led to low learning motivation and a decline in students’ psychomotor competencies. This study aimed to investigate the impact of a project-based learning job sheet on enhancing the psychomotor competencies of vocational students in the electrical systems of light vehicle bodies, including components such as the lighting system, power windows, signal lamp system, mirror cleaning system, and air conditioning system. This job sheet incorporated an innovative approach by integrating interactive visuals via QR codes, providing tutorial simulations of electrical systems in light vehicle bodies. This job sheet assisted students in understanding the material while encouraging active participation, collaboration, and high learning motivation. The present study employed research and development (R&D) using the ADDIE model (Analysis, Design, Development, Implementation, Evaluation). The research subject of this study is XI grade students of Light Vehicle Engineering at Vocational (SMK) Gardua Nusantara Karanggawen with applied quantitative approach. The data collection technique used a pre-test and a post-test, with the results analyzed using linear regression through the SPSS application. The validation result of the media and material experts showed that the developed job sheet is very feasible with an average score of 4.83 (scale of 5). The practicality test carried out by the teacher achieved 86.55%, or it was declared as very practical. The jobsheet effectivity was proven through N-Gain significant score in the experimental class, which gained 76.94%, while the control class achieved 26.70%. In conclusion, the project-based learning job sheet is effective in enhancing students’ psychomotor competencies and has become a feasible medium for instruction.
Co-Authors -, Lashari - ., Lashari AA Sudharmawan, AA Abdillah, Dhafin Zulfa Adib Maulana Afindala, Ajib Ageng, Sultan Agung Hermawan, Indra Agung Sutarto Alfita Ilfiyaningrum Alifta Lutfiaazahra Amelia, Naswa Badi Andyt Tegar Zakahfi Angginata, Sugita Luthfi Aprindra Priaji, Aprindra Arie Taveriyanto, Arie Arief Kusbiantoro Aryanti, Dian Eka Azizah, Kirana Prasetya Balqis Sabbah, Azzah Bambang Setyohadi Kuswarna Putra Bambang Suhendro Cahyo A, Hanggoro Tri Catur Rini Widyastuti, Catur Rini Danang Dwi Saputro Danuaji Syahdani, Raka Detria Ardhila Kumala Sari Dewi Lailatul Nikmah, Dewi Lailatul Dwi Sri Wahyudi Dwi Widjanarko Dzikri, Muhammad Aidhil Eko Supraptono Endah Kanti Pangestuti, Endah Kanti Ermansyah, Naufal Maulana Fadhila Tiara A Ferdian - Prakasa, Ferdian - Firdaus, Muh Arief Firdaus, Nisqiyah Fisa Savanti Fitrianto, Taufik Nur Fuad, Muhammad Nur Furqon, Septindra Hafizh Al Gustoro, Dimas Hamzah Muhammad Hamzah Fansuri Handayani, Sri Hanggoro Tri Cahyo Hanggoro Tri Cahyo A, Hanggoro Tri Hanggoro Tri Cahyo Andiyarto, Hanggoro Tri Cahyo Henry Apriyatno Herdiana Mutmainah, Herdiana Heri Yudiono Hidayatullah, Rahmad Hafid Ilfiyaningrum, Alfita Imelda Uli Vistalina Simanjuntak Indonesia, Bisma Garda Irawan, Dodi Jasmine, Belinda Zahvia Putri Jati Priantoro, Wisnu Jati Wahyu Arisetiawan Jen Lin Hsu Kabul Basah Suryolelono Kharisma, Anindya Batari Kurnia Dwi Anggraini, Kurnia Dwi Kusbiantoro, Arief Lashari - -, Lashari - Lashari ., Lashari Lili Marliyah M Arief Firdaus Mahardika Prasetya Aji Maheswari, Zahra Akira Marhaeni Dwi Satyarini Marpaung, Bangun Maulana, Adib Mego Purnomo Merli Apriyantika Moch Faizal Rachmadi Muhammad Hamzah Fansuri, Muhammad Hamzah Muhammad Khumaedi Muhammad Nur Fuad Muhsiung Chang Nirima Ramadhani Noor Hudallah Nugraha, Moh Ari Restian Nugraha, Muhammad Reza Robby Nur Aida Nur Qudus Nurani Nanda Isnaeni Nurfitriyani, Sintya Andryati Prakasa, Ferdian - Ratna Dewi Kusumaningtyas Restu Bachtiar, M. Vicky Rinarebut Rayhansah Rio Pratama, Anggy Ririn Anggraini Rizaldi Fadillah, Akhmad Rizky Julia Rachmawati, Rizky Julia Rr. Dewi Artanti Putri, Rr. Dewi Artanti S, Salam Sofan Samsudin Anis Setiyo Budiyanto Siti Zulaikhah Sri Handayani Subiantara, Muhammad Ilham Supriyadi Supriyadi Syahputra, Muhammad Farhan Syamsiar, Syamsiar Tigo Mindiastiwi Tjaturahono Budi Sanjoto Togani Cahyadi Upomo Togani Cahyadi Upomo, Togani Cahyadi Togani Togani Cahyadi Upomo Tri Wahyu Kuningsih Untoro Nugroho Untoro Nugroho Wardhani, Kinan Wintang Yeri Sutopo Yus, Rakha Alfarizhi Zahra Aulia Putri Zakahfi, Andyt Tegar Zelin, Mufita Aulia