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All Journal International Conference on Coastal and Delta Areas Journal of Civil Engineering and Technology Sciences Jurnal Teknik Sipil
Faizal Mahmud
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Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Engineering Transportation Other

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Repairs Of Expansive Land For Sub Grade Roads Pratikso Pratikso; Rachmat Mudiyono; Faizal Mahmud
International Conference on Coastal and Delta Areas Vol 3 (2017): The 3rd International Conference on Coastal and Delta Areas
Publisher : International Conference on Coastal and Delta Areas

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Subgrade is the most important part in laying the building structure, especially for road construction. The improvement of the quality of road facilities is carried out with initial planning on good pavement layers and should consider the type and strength of subgrade. Road conditions are often damaged in the structure of the road surface layer because it is caused because the structure of the soil in the area often experience shrinkage causing the road becomes cracked and even waving. It is therefore necessary to experiment to stabilize the soil by improving the gradation of mixing the original soil with a larger graded material of rice husk ash, in several experiments with several samples and aggregate mixture to find out the free press value on soil tested both before and after stabilized. The test results showed free press value of comparison between mixing using inorganic salts and lime has increased soil bearing capacity. From the results of this study can be concluded that the addition of the right stabilizer material on expansive soil is good enough to be used to improve the physical and mechanical properties of expansive soil. Keywords: Subgrade, expansive soil, soil stabilization, stabilizer material, soil bearing capacity
ANALISIS DINAMIKA STRUKTUR JEMBATAN RANGKA BAJA UNTUK MENGETAHUI PERILAKU STRUKTUR Bagus Acung Billahi; Kukuh Wisnuaji Widiatmoko; Faizal Mahmud; Fahrudin Ahmad
Journal of Civil Engineering and Technology Sciences Vol. 4 No. 1 (2025): April: Journal of Civil Engineering and Technology Sciences
Publisher : Faculty Of Engineering University 17 August 1945 Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56444/08ha7229

Abstract

The old bridge structure, are subjects that must be monitored in bridge maintenance. Bridge detection supervision is very necessary to determine structural deformation caused by normal operations or environmental impacts such as temperature, humidity and heavy vehicle loads. Monitoring the structure as a whole also needs to be carried out after extreme conditions occur, such as an earthquake. Research on structural dynamics analysis of steel frame bridge conditions to determine the behavior of the structure. Vibration data is read using a wireless sensor network or accelerometer. The vibration mode signal obtained is processed using Fast Fourier Transform (FFT) analysis via MATLAB software, which will produce a graph of the relationship between the frequency domain and the time domain. Through this graph, the dynamic characteristics of the bridge structure can be analyzed, with several variations in the condition of the bridge structure.
Perbaikan Tanah Ekspansif Dengan Penambahan Pasir Kasar Sebagai Stabilisator Faizal Mahmud; Hendra Masvika; Kukuh Wisnuaji Widiatmoko; Fahrudin Ahmad
Jurnal Teknik Sipil Vol. 17 No. 1 (2024): Juni 2024
Publisher : Faculty Of Engineering University 17 August 1945 Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56444/jts.v17i1.1394

Abstract

Stabilisasi tanah merupakan suatu langkah untuk meningkatkan sifat-sifat dan kekuatan pada tanah. Salah satu metode untuk meningkatkan daya dukung tanah adalah dengan menambah atau mencampur dengan material yang memiliki nilai daya dukung yang tinggi. Penelitian akan difokuskan pada daya dukung tanah dengan menambah atau mencampur pasir kasar menggunakan pengujian Atterberg Limits dan Proctor yang diharapkan dapat meningkatkan daya dukung tanah terhadap kepadatannya. Penelitian dilakukan di Laboratorium Mekanika Tanah Fakultas Teknik Univesitas Semarang dengan cara membuat sampel dari hasil pemadatan standar, kemudian sampel diberikan penambahan pasir kasar dengan persentase penambahan sebesar 0%, 10%, 30%, dan 50% untuk mendapatkan nilai Atterberg Limits dan Proctor maksimum setelah dilakukan penambahan pasir kasar. Pada masing-masing pengujian didapatkan hasil bahwa pada tanah tersebut mengalami peningkatan daya dukung setelah dilakukan stabilisasi, sehingga dapat disimpulkan bahwa pasir kasardapat digunakan untuk bahan stabilisasi. Pada masing-masing pengujian didapatkan hasil bahwa proses stabilisasi tanah optimum berada pada campuran 50%, hal ini terjadi karena sifat dari pasir kasar yang befungsi sebagai bahan pengisi tetapi tidak memiliki sifat mengikat, sehingga ketika volume pasir kasar telah memenuhi rongga-rongga tanah dan memiliki sisa, maka sisa pasir kasar tersebut akan menumpuk dan memadat bersama tanah sehingga lebih menstabilkan ikatan tanah yang telah terbentuk.
Analisis Nilai Amplitudo Jembatan Rangka Baja Menggunakan Beban Berjalan Dengan Metode Fast Fourier Transform (FFT) Bagus Acung Billahi; Kukuh Wisnuaji Widiatmoko; Faizal Mahmud
Jurnal Teknik Sipil Vol. 18 No. 2 (2025): Desember 2025
Publisher : Faculty Of Engineering University 17 August 1945 Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56444/hbv9my29

Abstract

A steel truss bridge is a structure constructed from a series of interconnected steel bars. The loads received by this structure are analyzed and transferred to the steel bars that make up the structure. Factors that need to be analyzed in bridge construction include the location and surrounding environmental conditions. After identifying the type of soil and bedrock beneath the surface, the materials used must meet strength or durability test standards before the bridge can be operated. The materials used must comply with the Indonesian National Standard (SNI). In addition to the factors mentioned above, the bridge must undergo a feasibility evaluation. Among the various tests used to evaluate bridge strength, one is vibration testing. The vibration test method, when compared to the load test method, shows higher cost efficiency and does not cause damage to the structure.
Co-Authors Bagus Acung Billahi Fahrudin Ahmad Kukuh Wisnuaji Widiatmoko Masvika, Hendra Pratikso Pratikso Rachmat Mudiyono