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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL Jurnal Teknik Sipil Jurnal Teknik Sipil Teras Jurnal Civil Engineering Dimension Dinamisia: Jurnal Pengabdian Kepada Masyarakat Journal of the Civil Engineering Forum Makara Journal of Technology
Ali Awaludin
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation Other

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Pengembangan Irigasi Mikro Tirta Wanagama Abadi, Kalurahan Mulusan, Kabupaten Gunung Kidul Endita Prima Ari Pratiwi*; Neil Andika; Tantri Nastiti Handayani; Ni Nyoman Nepi Marleni; Ali Awaludin; Fatchan Nurrochmad
Dinamisia : Jurnal Pengabdian Kepada Masyarakat Vol. 7 No. 5 (2023): Dinamisia: Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Lancang Kuning

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/dinamisia.v7i5.15452

Abstract

Kalurahan Mulusan berada di Kepanewon Paliyan, Kabupaten Gunung Kidul. Mata pencaharian utama penduduk Kalurahan Mulusan adalah pertanian sawah tadah hujan. Pada musim kemarau, air yang tersedia sangat terbatas sehingga banyak lahan yang menganggur. Kegiatan pengabdian kepada masyarakat ini bertujuan mengembangkan irigasi mikro di Kalurahan Mulusan yaitu dengan meningkatkan ketersediaan air dan memperluas lahan yang dapat diairi khususnya pada musim kemarau. Kegiatan dilaksanakan pada bulan Juli sampai November 2021. Kelompok tani muda Tirta Wanagama Abadi, Kalurahan Mulusan, menjadi sasaran dan sekaligus pelaku kunci dari kegiatan ini. Kegiatan pengabdian kepada masyarakat ini juga mendapat dukungan finansial dari mitra industri teknik sipil. Hasil kegiatan ini adalah sebuah sumur bor baru, penambahan tangki penampungan air, perluasan jaringan irigasi pipa, serta hasil uji kualitas air. Kegiatan pengembangan irigasi mikro ini merupakan contoh nyata kolaborasi perguruan tinggi, masyarakat, dan industri yang diharapkan dapat meningkatkan produksi pertanian dan kesejahteraan masyarakat Kalurahan Mulusan.
A Cyclic Behavior of Multidirectional Box-Shaped Shearing Damper: Experimental Study Setiawan, Angga Fajar; Awaludin, Ali; Satyarno, Iman; Md Nor, Noorsuhada; Haroki, Yusuf; Darmawan, M. Fauzi; Purnomo, Sidiq; Sumartono, Ignatius Harry
Journal of the Civil Engineering Forum Vol. 11 No. 2 (May 2025)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcef.14550

Abstract

This paper discusses an experimental study investigating the behavior of the multidirectional box-shaped shearing damper (MBSD) proposed for a bridge structures application. The MBSD consisted of a box-shaped steel plate hot coil (SPHC) material with an effective dimension of 100 x100 mm2 designed to dissipate earthquake excitation energy under combined resultant from longitudinal and transversal directions. The specimens varied with two different web slendernesses, i.e., 58.8 and 27.0. Furthermore, to investigate the different load direction effects, four different loading angles with respect to one of the web planes, i.e., 0°, 15°, 30°, and 45° to be implemented. The specimens were subjected to cyclic loading according to AISC/ANSI 341-22. In the experiment, the shear yield strength, ultimate state behavior, and energy dissipation achievement were evaluated. The result was that MBSD could achieve shear strength and sufficient energy dissipation under different angles of loading direction ranging from yielding to ultimate deformation state. The yielding and ultimate characteristics of MBSD were coincident with the ordinary shear panel damper. A stockier web resulted in a more stable stiffness after the yield point and less buckling of the web but also a slightly earlier strength degradation due to the earlier fracture damage to the welded joint. Finally, the MBSD device had visibility for application on bridge structure as a seismic device by considering appropriate strength and deformation capacity compatibility adjustment with the ultimate displacement limit of 0.11 rad drift angle. In addition, the recommendation for using a better elongation capacity steel material and less welding assembly will improve the behavior and seismic performance of the MBSD.
Efektifitas Metode SSI Covariance dalam Sistem Pemantauan Kesehatan Struktur (SHMS) Jembatan Box Girder Bentang 40 Meter. Akbar, Muhammad; Aminullah, Akhmad; Awaludin, Ali
Teras Jurnal : Jurnal Teknik Sipil Vol. 15 No. 2 (2025): Teras Jurnal (September)
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v15i2.1293

Abstract

Abstrak   Pemantauan frekuensi alami pada jembatan box girder bentang 40 meter merupakan langkah penting dalam memastikan stabilitas dan keselamatan struktur selama kondisi layanan aktual. Penelitian ini menerapkan metode Stochastic Subspace Identification (SSI) covariance untuk mengidentifikasi karakteristik dinamis struktur berdasarkan respons getaran akibat beban operasional kendaraan yang melintas. Data diolah tanpa eksitasi buatan, sehingga mencerminkan perilaku dinamis jembatan secara realistis. Hasil analisis menunjukkan frekuensi alami yang stabil dan konsisten pada rentang 3,88–3,89 Hz, baik dari masing-masing sensor maupun analisis gabungan. Temuan ini konsisten dengan hasil pemodelan numerik, yang memperkuat validitas metode SSI covariance sebagai pendekatan non invasif dalam pemantauan kesehatan struktur. Pendekatan ini menegaskan frekuensi alami sebagai indikator utama dalam mengevaluasi kondisi struktural jembatan secara akurat dan andal di bawah beban operasional nyata.   Kata kunci: SHMS, OMA, SSI covariance, Frekuensi Alami.   Abstract   Monitoring the natural frequency of a 40-meter span box girder bridge is essential to ensure the structural stability and safety under actual service conditions. This study applies the Stochastic Subspace Identification (SSI) covariance method to identify the dynamic characteristics of the structure based on vibration responses induced by operational vehicle loads. The data were processed without artificial excitation, thereby reflecting the realistic dynamic behavior of the bridge during operation. The analysis results indicate a stable and consistent natural frequency in the range of 3.88–3.89 Hz, observed across individual sensor measurements as well as in combined analysis. These findings are in good agreement with the numerical modeling results, strengthening the validity of the SSI covariance method as a non invasive approach in structural health monitoring. This approach emphasizes the role of natural frequency as a key indicator for accurate and reliable evaluation of bridge structural conditions under real operational loads.   Keywords: SHSM, OMA, SSI covariance, Natural Frequency
The Axial Compression Capacity of Finger-Jointed Laminated Board Made from Rubber Wood Species Awaludin, Ali; Sulhan, Muhammad Afif; Effendi, Mahmud Kori; Hassan, Rohana
Civil Engineering Dimension Vol. 27 No. 2 (2025): SEPTEMBER 2025
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/ced.27.2.113-122

Abstract

The utilisation of Rubberwood was an effort to provide an alternative to low-cost housing in Indonesia. This study investigated the use of Rubberwood Finger-Jointed Laminated Board (FJLB) under compression loading parallel to the grain. The investigation included laboratory experiments and numerical analysis. The experiments were conducted using two specimens of FJLB members, each with a length of 2000 mm and a cross-sectional dimension of 100 mm × 100 mm². Finite element analysis (FEA) was employed to predict the axial capacity, considering non-linearity, contact boundary conditions, and buckling analysis of the material. The study found an average axial capacity of 150.9 kN for the two specimens, which was 3.2% higher than the FEA and 5.4% higher compared to the Euler formula. Laboratory measurements revealed that initially, the stress distribution in the cross-section was uniform, then suddenly changed to a combination of tension and compression during the final loading stage.
Co-Authors Achmad Basuki Aminullah, Akhmad Andreas Triwiyono Arfiati FArdhani, Arfiati Ay Lie Han Bambang Suhendro Bambang Supriyadi Darmawan, M. Fauzi Endita Prima Ari Pratiwi* Fatchan Nurrochmad Haroki, Yusuf Hassan, Rohana I Gusti Lanang Bagus Eratodi Iman Satyarno Irawati, Inggar Septhia Mahmud Kori Effendi Making, Maria Yasinta Menge Md Nor, Noorsuhada Muhammad Akbar Neil Andika Ni Nyoman Nepi Marleni Niken Palaeowati Purnomo, Sidiq Setiawan, Angga Fajar Sulhan, Muhammad Afif Sumartono, Ignatius Harry Suprapto Siswosukarto Tantisaputri, Intan Archita Tantri Nastiti Handayani TATI NURHAYATI Yudhi Arnandha