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INDONESIA
MEDIA KOMUNIKASI TEKNIK SIPIL
Published by Universitas Diponegoro
ISSN : 08541809     EISSN : 25496778     DOI : -
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
Media Komunikasi Teknik Sipil (ISSN 0854-1809) published twice in a year, in July and December. The article can be product of researches, scientific thoughts or case study, in civil engineering and isn’t formed by politics, commercialism, and subjectivity unsure. This scientific journal contains articles of thought and research results in Civil Engineering that have never been published in scientific journals or other media.
Arjuna Subject : -
Articles 471 Documents
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Kajian Penambahan Kapur dan Serbuk Marmer Terhadap Kuat Tekan Tanah Lempung Waruwu, Aazokhi; Priyo, Aaron Nicholas; Raymond, Raymond
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 30, Nomor 2, DESEMBER 2024
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v30i2.65445

Abstract

The design of roads and other constructions requires attention to the subgrade. In Indonesia, clay soils are quite common and tend to have low bearing capacity. To increase the bearing capacity of clay soils, it is necessary to carry out soil improvement and stabilization measures. Soil stabilization can be done by adding stabilizing materials such as lime and marble powder. Before stabilizing the soil, it is necessary to test soil characteristics such as testing water content, unit weight, Atterberg limit, specific gravity, sieve analysis and hydrometer. This research was carried out to obtain the most optimum composition of the stabilization mixture. This research used lime additives with compositions of 1.5% and 3%, respectively, marble powder was added with compositions of 3%, 6% and 9%. After that, a compaction test is carried out to determine the optimum water content and maximum dry weight. After getting the results from the compaction test, the soil bearing capacity can be analyzed using the Unconfined Compression Test. The test results showed that the addition of 3% lime and 9% marble powder resulted in a significant increase in compressive strength and shear strength values in clay soil. Closed-molded test specimens show an increasing trend in compressive strength values better than open-molded specimens.
Kajian Evaluasi Perlintasan Sebidang di Jalur Perlintasan Langsung (JPL) di Kota Semarang Budiharjo, Anton; Habibah, Fistirika; Tohom, Frans
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 30, Nomor 2, DESEMBER 2024
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v30i2.65494

Abstract

As a mass transportation system infrastructure, level crossings impact road users, including skidding, roaddamage, and accidents. Based on data from KAI DAOP 4 Semarang, there were 12 accidents at level crossingsin 2023, while in 2024, the number increased to 26, indicating a rise in accident rates. One accident that wentviral on social media occurred in Semarang in 2023, involving a low-bed trailer that got stuck at a levelcrossing. The objective of this study is to analyze and evaluate level crossings, assess their compliance withregulations, and provide recommendations for improvements. This research employs the triangulation method,utilizing data obtained from geometric surveys and an inventory of crossing equipment. The study focuses onlevel-crossing locations JPL 6 Madukoro and JPL 5 Kaligawe in Semarang City. The findings indicate that theexisting conditions do not fully comply with regulatory requirements in terms of facilities and geometricspecifications. Specifically, the Madukoro crossing is constructed at a higher elevation than the surroundingtopography, creating a hump with a height of 86 cm above the road surface and a grade of 12.8%. Thiscondition increases the risk of long vehicles, such as low-bed trailers, getting stuck, potentially leading tosevere accidents. Therefore, it is recommended that regulations concerning level crossings be reviewed andrevised.
Kajian Numerik Perilaku Sambungan Kayu Geser Tunggal Menggunakan Elemen Balok dan Elemen Solid Wijaya, Naga; Suryoatmono, Bambang; Tjahjanto, Helmy Hermawan
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 30, Nomor 2, DESEMBER 2024
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v30i2.61725

Abstract

Modelling single shear wood connection using solid elements is more accurate, especially in simulating the contact between the surface of the lag screw and the surface of the pre-drilled hole, but it is more complicated in terms of geometry and number of nodes. An alternative method is approached by modelling the lag screw as a beam element, with the limitations of modelling the contact interaction between the lag screw and timber members. In this study, diameter variations were also modelled to investigate joint behavior. To validate the model accuracy, a modelling was also performed in which the connectors and timber members were all modelled as solid elements and performed theoretical calculations. Numerical analysis was carried out by modelling the connection specimens using the finite element method in the ABAQUS software. The results showed that the connection capacity between solid element and beam element modelling are quite similar. The accuracy of modelling the lag screw as a beam element is lower at larger diameters and requires a method to correct the results.
Pengaruh Substitusi Agregat Halus dengan Limbah Ban Karet terhadap Karakteristik Mekanik dan Kemampuan Absorpsi Suara pada Panel Dinding Beton Sumarni, Sri; Yusti, Adi Putra; Habsya, Chundakus
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 30, Nomor 2, DESEMBER 2024
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v30i2.65498

Abstract

Penelitian ini mengeksplorasi penggunaan limbah ban karet sebagai pengganti agregat halus pada panel dinding beton untuk mengurangi pencemaran lingkungan dan mendorong bangunan berkelanjutan dengan sifat ringan dan menyerap suara. Penelitian ini bertujuan untuk mengevaluasi pengaruh penggantian limbah ban terhadap berat isi, kekuatan lentur, dan koefisien penyerapan bunyi, sekaligus mengidentifikasi persentase optimal untuk karakteristik yang diinginkan. Percobaan memvariasikan kandungan ban karet (5%, 10%, 15%, 20%, dan 25%) sebagai variabel bebas, dengan berat jenis, kuat lentur, dan serapan bunyi sebagai variabel terikat. Hasil menunjukkan bahwa peningkatan persentase limbah ban akan menurunkan berat jenis beton, dengan berat jenis beton minimum sebesar 1311,63 kg/m³ pada penggantian 25%. Namun, kandungan ban yang lebih tinggi akan melemahkan kekuatan lentur, yang mencapai puncaknya pada 3,02 N/mm² dengan penggantian 5%. Di sisi lain, kinerja akustik meningkat dengan lebih banyak kandungan karet, mencapai penyerapan suara optimal pada penggantian 15%, dengan koefisien maksimum 0,22324 pada 974 Hz.
Model Respons Seismik Tanah di Kecamatan Selebar Akibat Perambatan Gelombang Gempa Satu Dimensi Fahrezi, Zhehan; Misliniyati, Rena; Amri, Khairul; Mase, Lindung Zalbuin; Hardiansyah, Hardiansyah
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 30, Nomor 2, DESEMBER 2024
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v30i2.64462

Abstract

Penelitian ini dilakukan untuk mengetahui respons lapisan tanah akibat perambatan gelombang gempa di Kecamatan Selebar Kota Bengkulu. Studi ini diawali dengan investigasi di lapangan pada enam titik. Analisis respons seismik dibangun berdasarkan model perambatan gelombang satu dimensi dengan metode ekivalen linier dan non-linier. Gelombang gempa terskala Bengkulu-Mentawai tahun 2007 diterapkan sebagai gelombang input. Perbandingan PGA, percepatan respon spektra, dan faktor amplifikasi yang dihasilkan dari kedua metode disajikan dalam penelitian ini. Nilai PGA yang dihasilkan dengan metode ekivalen linier lebih besar sekitar 5% - 30% dari metode non-linier. Faktor amplifikasi yang dihasilkan dengan metode ekivalen linier mengalami penguatan lebih besar sekitar 3% - 30% dari metode non-linier. Percepatan spektra secara umum telah melewati desain seismik yang berlaku pada pada periode pendek, dengan nilai sebesar 1,2g – 2,1g untuk metode ekivalen linier dan 1,1g – 1,6g untuk metode non-linier. Maka perlu adanya pembaharuan desain seismik untuk perencanaan bangunan gedung di Kecamatan Selebar Kota Bengkulu.
Analisis Kebutuhan Air Irigasi Menggunakan Software Cropwat 8.0 (Studi Kasus: Daerah Irigasi Sekampung Batanghari) Putra, Muhammad Hakiem Sedo
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 30, Nomor 2, DESEMBER 2024
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v30i2.66772

Abstract

The lack of irrigation water supply causes farmers in the downstream area of the irrigation flow to choose to plant secondary crops or clear the land. This also occurs in the Sekampung Batanghari Irrigation Area with a potential area of 9,634 ha. In analyzing water requirenment, Cropwat 8.0 software can be used as an alternative so that the calculation process becomes easier and maximized. This research aims to analyze irrigation water requirement, cropping patterns, and irrigation water supply. The data used in this study include rainfall data, weir discharge, and climatology covering the Sekampung Batanghari Irrigation Area, each for the last 10 (ten) years. The analysis carried out is to calculate discharge of the weir, effective rainfall, potential evapotranspiration, crop water requirements, cropping patterns, irrigation water supply schemes, and analyze water balance. The cropping pattern used is Paddy-Paddy-Palawija with corn as a secondary crop. The greatest value of water demand in December is 5.42 m3/s. The scheme of giving irrigation water to paddy field is carried out continuously with certain water discharge of 5 mm / day. The availability of water is declared sufficient after analyzing water demand in the first planting season, namely paddy covering 100% of the total potential area, the second planting season, namely paddy covering 75% and corn covering 25%, the third planting season, namely corn covering 20% of the total area.
Identifikasi Skenario Curah Hujan Pemicu Kegagalan Lereng di Pagar Alam dan Sekitarnya Gofar, Nurly; Haryanto, Yudi; Purnama Sari Dewi, Anggi
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 30, Nomor 2, DESEMBER 2024
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v30i2.62372

Abstract

Pagar Alam and its surrounding area are located in the Bukit Barisan Mountain Rang, thus, the topography is hilly and mountainous. National Road segments passing the area often experience slope failure, which causes distraction to the transportation of people and goods. Past observations showed that slope failures are related to frequent and prolonged rainfall. This paper presents the results of a numerical study on the mechanism of rainfall-induced slope failures in Pagar Alam. The study aimed to identify the critical rainfall scenario triggering slope failures. Data observation indicates that even though wet season started in October, most slope failures occurred between January and April. Thus, initial moisture is required to start the mechanism of failure. The transient pore-water pressure was assessed using SEEP/W while the slope stability was evaluated using Slope/W. The analysis showed that the critical rainfall scenario is a combination of antecedent and major rainfall. The duration of the antecedent rainfall is influenced by the slope angle.
Analisis Kinerja Proyek Pemasangan Pipa HDPE 450 Terhadap Biaya dan Waktu Menggunakan Metode Earned Value Hafum, Emanuel Paihaf; Irawan, Dafid; Suraji, Aji
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 30, Nomor 2, DESEMBER 2024
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v30i2.60714

Abstract

Construction project work requires regular monitoring to determine project performance based on the work that has been realized. The purpose of this study is to evaluate cost and time performance while estimating the time and cost of completing the drainage pipe project for each reporting period. In this study, the Earned Value Method is used to measure performance by comparing planned work with realized work, as well as the actual cost of the work. The results of the 12th week of research showed that the cost of project implementation was lower than planned, as indicated by the Cost Variant value of +117,923,808.28 (1.37%), Cost Performance Index of 1.01 (> 1), Schedule Variant of +1,731,414,451.68 (20.08%), and Schedule Performance Index of 1.25 (> 1). The results of the above indicators indicate that the project was implemented faster than planned. The results of the calculation of the estimated time for the first to third weeks remain consistent with the plan, which is 14 weeks, while for the fourth to twelfth weeks it is lower than planned. The results of the cost evaluation show that from the first week to the fifth week, the average final cost of completing the project was 102.54% higher than the planned budget, while from the sixth week to the twelfth week, the final cost of the project was 90.01% lower than the planned budget of 100%.
Perkembangan Uji Geser Langsung Skala Ukuran Besar untuk Material Acak Bendungan di Indonesia Sahadewa, Andhika
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 31, Nomor 1, JULI 2025
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v31i1.69081

Abstract

Dams offer various benefits to life. In the last decade, Indonesia built above 50 dams. These dams majorly are built from geomaterial fill, including random materials. Random materials are very economical and have a low environmental bad impact, so their use tends to be maximized. Zones of random material often affect dam stability. Unfortunately, the evaluation of random material shear strength, a crucial parameter for dam stability analysis, is challenging. The large particles in random materials become an obstacle in shear strength tests using regular size apparatus. In Indonesia, there are several large-scale direct shear test facilities in laboratory and field to reliably test random material shear strength. Each laboratory test facility is owned by Technical Implementation Unit for Hydraulics and Water Geotechnics, PT. Indra Karya (Persero), and River Basin Organization for Bengawan Solo. The field test facility, called ILSDS, was devised by the Indonesian Geotechnical Inztitute in cooperation with Institut Teknologi Bandung and Universiti Teknologi Malaysia. This paper introduces these facilities and presents the results of ILSDS tests on random materials in Rukoh Dam, Aceh. The test results showed variability in shear strength as well as a unique behavior in the stress- strain relationship related to the random material content itself, such as large-grain rich or fine-grain rich materials. This large-scale testing is cost-effective, simple, and reliable. It is greatly recommended as a regular practice in a dam construction.
Model Berbasis Kecerdasan Buatan untuk Prediksi Kekuatan Beton Geopolimer Khasani, Riqi Radian; Hermawan, Ferry; Khitam, Akhmad Firdos Khoiril
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 31, Nomor 1, JULI 2025
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v31i1.70716

Abstract

Geopolymer concrete (GPC) has emerged as a sustainable alternative to conventional concrete, offering reduced carbon emissions and enhanced mechanical properties. However, variability in compressive strength due to material composition poses challenges to its broader adoption. Traditional evaluation methods are often time-consuming and resource-intensive, necessitating the development of precise and efficient predictive tools. This study introduces the optimized least squares moment balanced machine with feature selection (OLSMBM-FS), an advanced AI-based model for accurately predicting GPC compressive strength. The model incorporates backpropagation neural networks (BPNN) for weight assignment, least squares support vector machines (LSSVM) for hyperplane optimization, and the optical microscope algorithm (OMA) for hyperparameter tuning. The study employs a systematic dataset, implementing normalization and feature selection techniques to improve the accuracy and efficiency of the model training process. The OLSMBM-FS was validated using 10-fold cross-validation and demonstrated superior performance compared to other machine learning models. It achieved the lowest RMSE (4.279), MAE (2.291), and MAPE (6.59%), alongside the highest R (0.901) and R² (0.813), confirming its robustness and predictive accuracy. These findings highlight the potential of OLSMBM-FS as a reliable tool for predicting GPC compressive strength, supporting its broader application in sustainable construction practices.

Page 44 of 48 | Total Record : 471

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