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Bulletin of Civil Engineering
Published by Universitas Muhammadiyah Yogyakarta
ISSN : 27971104     EISSN : 27756351     DOI : https://doi.org/10.18196/bce
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
Bulletin of Civil Engineering (BCE) is an international journal of civil engineering. This journal publishes original papers on interdisciplinary theoretical and practical research related to the broad spectrum of civil engineering, encompassing all related sub-topics. The journal provides a forum for the international civil engineering community to present and discuss matters of major interest, including new developments in civil regulations. Coverage includes Structures; Geotechnics; Transportation; Environment; Earthquakes; Water Resources; Hydraulic and Hydraulic Structures; Construction Management and Materials.
Arjuna Subject : Teknik (semua kategori) - Bangunan dan Konstruksi
Articles 55 Documents
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Penilaian Keandalan Bangunan dengan Pendekatan Bangunan Sehat Prayuda, Hakas
Bulletin of Civil Engineering Vol. 6 No. 1 (2026): Februari
Publisher : Civil Engineering Department, Universitas Muhammadiyah Yogyakarta

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Abstract

Kualitas suatu bangunan ditentukan oleh bagaimana bangunan tersebut dirancang, dibangun, dan dikelola agar mampu mendukung kesehatan, kenyamanan, serta keselamatan penggunanya. Mutu bangunan dapat dijaga melalui pengendalian teknik dengan mengatur ventilasi dan kondisi ruang serta melakukan evaluasi ketahanan struktur agar bangunan tetap berfungsi dengan baik dan memenuhi standar kualitas. Penelitian ini bertujuan untuk menilai kelayakan bagunan dalam memenuhi kriteria sebagai bangunan sehat sekaligus mengevaluasi kekuatan strukturnya dalam menghadapi potensi gempa melalui pemeriksaan visual yang sistematis. Metode penelitian dilakukan melalui survei lapangan untuk menilai kondisi bangunan sesuai dengan ketentuan Kementerian Kesehatan Republik Indonesia No. 829/Menkes/SK/VII/1999 serta melakukan evaluasi kerentanan bangunan terhadap gempa melalui pemeriksaan visual. Penelitian dilakukan pada beberapa gedung yang berada dilingkungan kampus Universitas Muhammadiyah Yogyakarta, Universitas ’Aisyiyah Yogyakarta, Universitas Ahmad Yani, dan Universitas Alma Ata. Hasil penelitian yang dilakukan menunjukkan bahwa semua gedung memenuhi standar bangunan sehat sesuai dengan ketentuan yang berlaku. Pemeriksaan struktur terhadap gempa dengan visual menunjukkan nilai S = 2,3-3,4 dengan potensi kerentanan yang kecil yaitu sekitar 0,04%-0,50% sehingga gedung secara struktural diniai aman. Secara keseluruhan gedung yang dianalsis memenuhi kriteria bangunan sehat serta memliki tingkat kerentanan terhadap gempa yang rendah sehingga dinilai aman secara struktural untuk mendukung terciptanya fasilitas pendidikan yang aman dan nyaman.
Pengaruh Peningkatan Produksi dan Penambahan Fasilitas Crusher terhadap Efisiensi Coal Hauling Rahmawati, Anita; Muda, Nadio Dinata; Soebandono, Bagus
Bulletin of Civil Engineering Vol. 6 No. 1 (2026): Februari
Publisher : Civil Engineering Department, Universitas Muhammadiyah Yogyakarta

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Abstract

Produktivitas adalah kapasitas suatu alat untuk memproduksi barang dalam periode waktu tertentu, dan alat menjadi elemen krusial dalam pelaksanaan proyek besar. Produktivitas alat ditentukan oleh kapasitas, waktu siklus, efisiensi alat, dan kondisi pengoperasian pemuatan di depan. Penelitian ini bertujuan untuk mengevaluasi produktivitas alat berat dan kegiatan hauling akibat adanya New Crusher . Penelitian ini diambil dengan cara melakukan pengamatan menggunakan data CCTV, berupa data arus lalu lintas, waktu tunggu, dan geometri jalan. Berdasarkan hasil penelitian yang dilakukan , dapat disimpulkan bahwa cycle time memiliki pengaruh yang signifikan terhadap produktivitas alat angkut Adanya arus lalu lintas yang tinggi menyebabkan terjadinya waktu tunggu dengan rata-rata 1,07 menit yang mempengaruhi kelancaran aktivitas hauling. Adanya New Crusher mampu mengurangi hambatan lalu lintas sehingga waktu tunggu dapat diminimalkan. Keberadaan New Crusher terbukti mampu meningkatkan efektivitas dan efisiensi aktivitas hauling, mengurangi waktu edar alat angkut, serta mendukung pencapaian target produksi batubara secara optimal.   Productivity is the capacity of equipment to produce goods within a certain period of time, and equipment is a crucial element in the implementation of large-scale projects. Equipment productivity is determined by capacity, cycle time, equipment efficiency, and the operating conditions. This study aims to evaluate the productivity of heavy equipment and hauling activities due to the presence of New Crusher. This study was conducted by observing using CCTV data, in the form of traffic flow data, waiting time, and road geometry. Based on the results of the study, it can be concluded that cycle time has a significant influence on the productivity of hauling equipment. The presence of high traffic flow causes an average waiting time of 1.07 minutes which affects the smoothness of hauling activities. The presence of New Crusher is able to reduce traffic congestion so that waiting time can be minimized. The presence of New Crusher is proven to be able to increase the effectiveness and efficiency of hauling activities, reduce the circulation time of hauling equipment, and support the achievement of coal production targets optimally.
Pengaruh Tension Crack pada Stabilitas Lereng Limestone di Bali Selatan Basoka, I Wayan Ariyana; Hidayat, Muhammad Nurjati
Bulletin of Civil Engineering Vol. 6 No. 1 (2026): Februari
Publisher : Civil Engineering Department, Universitas Muhammadiyah Yogyakarta

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Abstract

Wilayah Bali Selatan, khususnya Uluwatu, Pecatu, dan Nusa Dua, dikenal dengan tebing-tebing batu gamping yang indah namun rentan terhadap ketidakstabilan lereng. Salah satu pemicunya adalah terbentuknya tension crack di bagian puncak tebing, yang meskipun sulit diamati, memiliki pengaruh besar terhadap penurunan faktor keamanan, terutama saat air hujan mengisi retakan tersebut. Penelitian ini menganalisis pengaruh variasi kedalaman tension crack terhadap stabilitas lereng batu gamping menggunakan pemodelan numerik berbasis metode keseimbangan batas. Hasil analisis menunjukkan bahwa semakin dalam retakan, semakin rendah nilai faktor keamanan lereng. Pada kondisi kering, faktor keamanan menurun dari 1,471 (tanpa crack) menjadi 1,307 pada kedalaman retakan 5 m. Kondisi menjadi jauh lebih kritis ketika tension crack terisi air. Pada kedalaman 3 m, faktor keamanan turun hingga 0,921, dan pada kedalaman 4–5 m nilai FS berada pada kondisi sangat kritis (FS < 0,30). Hal ini menegaskan bahwa infiltrasi air ke dalam retakan memperburuk kestabilan lereng secara signifikan. Dengan demikian, kedalaman retakan dan keberadaan air merupakan parameter utama yang mengontrol potensi longsor pada tebing batu gamping di Bali Selatan, terutama pada musim penghujan.   The southern region of Bali, particularly Uluwatu, Pecatu, and Nusa Dua, is known for its beautiful limestone cliffs that are, however, prone to slope instability. One of the contributing factors is the formation of tension cracks at the cliff crest, which, although difficult to observe, greatly influence the reduction of slope safety, especially when rainfall infiltrates and fills these cracks. This study analyzes the effect of varying tension crack depths on the stability of limestone slopes using numerical modeling based on the Limit Equilibrium Method. The results indicate that deeper cracks correspond to lower slope safety factors. Under dry conditions, the safety factor decreases from 1.471 (without crack) to 1.307 at a crack depth of 5 m. The condition becomes much more critical when the tension crack is filled with water. At a depth of 3 m, the safety factor drops to 0.921, and at 4–5 m the FS reaches a very critical level (FS < 0.30). These findings demonstrate that water infiltration into the crack significantly worsens slope stability. Therefore, crack depth and the presence of water are the main controlling parameters for landslide potential along the limestone cliffs of South Bali, particularly during the rainy season.
Value Engineering Implementation in an Integrated Arts Laboratory Project Triswandana, I Wayan Gde Erick; Agus Arya Pramana Maharat , Fortunata
Bulletin of Civil Engineering Vol. 6 No. 1 (2026): Februari
Publisher : Civil Engineering Department, Universitas Muhammadiyah Yogyakarta

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Abstract

Infrastructure development projects often face design changes that affect specifications, volumes, and resource allocation, thereby requiring adjustments to cost estimates. Conventional cost-cutting practices frequently compromise quality, underscoring the need for systematic approaches such as Value Engineering (VE). This study applies VE in conjunction with the Pareto Distribution Principle to optimize cost efficiency and functional performance in the construction of an integrated arts laboratory building. A descriptive quantitative method was employed, encompassing the phases of information gathering, functional analysis using the Function Analysis System Technique (FAST), creative brainstorming, evaluation, and presentation. Pareto analysis revealed that 78.99% of project costs were concentrated in architectural, structural, and roofing works, which became the focus of VE. Functional analysis identified opportunities to substitute lower-order functions, particularly in formwork, door and window installations, and ceiling work. Comparative evaluation of alternative designs demonstrated significant improvements: composite slabs enhanced installation efficiency despite slightly higher initial costs; aluminium frames for doors and windows reduced life cycle costs by 30.8 million IDR while improving durability; and PVC ceilings achieved savings of 148.9 million IDR with superior performance indicators. Overall, VE implementation yielded cost savings, reduced material waste, and improved technological innovation without compromising quality. The integration of VE and Pareto analysis thus provides a comprehensive framework for achieving optimal value in construction projects, balancing cost efficiency, functionality, and sustainability.
Comparative Stability Assessment of Dual Versus Single Reinforcement Configurations in Mechanically Stabilized Earth (MSE) Walls Hartono, Edi; Diana, Willis; Afifah Anis Tsamara , Ghina
Bulletin of Civil Engineering Vol. 6 No. 1 (2026): Februari
Publisher : Civil Engineering Department, Universitas Muhammadiyah Yogyakarta

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Abstract

Mechanically stabilized earth (MSE) walls are widely used in transportation infrastructure due to their cost efficiency, constructability, and adaptability. However, the performance implications of different reinforcement configurations under combined static and seismic loads remain insufficiently quantified. This study examines a 7.2 m MSE wall reinforced with either dual 30 kN strips or a single 50 kN strip, analyzing internal, external, and global stability using both manual calculations and Limit Equilibrium Method (LEM) with Geo5. Geotechnical properties, reinforcement reduction factors, traffic surcharges, and seismic coefficients were incorporated following national design standards. Manual methods applied Rankine and Coulomb formulations, while Geo5 captured soil–strip interface behavior. Results indicate that the dual 30 kN configuration achieved higher tensile and external stability factors, offering enhanced load distribution and redundancy, particularly advantageous under seismic or high-surcharge conditions. The single 50 kN configuration exhibited higher breakage resistance and construction simplicity, suitable for static or cost-driven scenarios. Manual and numerical results were closely matched, with differences typically below 10%, supporting the validity of LEM for design verification. These findings underscore the need to tailor reinforcement strategies to site-specific conditions and performance objectives. Future research should explore hybrid configurations and long-term monitoring to optimize cost-performance trade-offs in MSE wall design.

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