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TEKNOLOGI PEMANEN KABUT (FOG HARVESTING) SEBAGAI SOLUSI MENGATASI MASALAH KEKERINGAN PADA DATARAN TINGGI Taufani, Aditya Riski; Utomo, Puji; Maulana, Taufiq Ilham; Musofa, Musofa
Program Kreativitas Mahasiswa - Penelitian PKM-P 2013
Publisher : Ditlitabmas, Ditjen DIKTI, Kemdikbud RI

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Drought occur in Ngoho Plateu, Semarang and always happened in dry season. However, the plateu has a big potential of fog, which always occur in wet and dry season. This research purposes to determine the potential of fog Â harvesting, 4 models of standard fog collectors (SFC) were installed in two locations. Each location were installed 2 models with azimuth of 90o and 180o. Data collected for 4 months, on condition where foggy day only. Equipment that harvested largest amount of fog water was model 4 which were mounted on highest land of plateu azimuth of 90o. Model 4 was capable to harvest water 8 liter/m2 in fog duration of 8 hours.Â Keywords : water, fog, standard fog collector

Kajian Kuat Tekan Material Tanah Lempung dan Pasir Berbahan Campur Sampah Plastik Rumah Tangga Maulana, Taufiq Ilham
Semesta Teknika Vol 19, No 1 (2016): MEI 2016
Publisher : Semesta Teknika

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

In Indonesia, the waste has become a national issue which must be managed in a comprehensive and integrated from upstream to downstream in order to provide economic benefits, healthy for the community, and safe for the environment, and can change peoples behavior. From various types of waste, plastic is a very dangerous household waste. One effort to reduce dam use plastic waste is to be made as mixing clay and sand to produce material that can be used as building materials. In this research molten plastic waste was mixed with clay and sand with variations of ratio plastic-sand and plastic-clay is 1: 2, 1: 3 and 1: 4. The results revealed that the optimum ratio of plastic-sand mixture is 1: 3 with a compressive strength of 13.5 MPa and the optimum mix of plastic-clay is 1: 2 with a compressive strength of 14.21 MPa. The collapse pattern that occurred in the plastic-sand mixture was shear failure that caused test object splitting, while the plastic-clay mixture is shear failure, but without causing the test object splitting.Â

PERKUATAN STRUKTUR JEMBATAN KERETA API RANGKA BAJA TIPE WARREN BENTANG 42 METER soebandono, Bagus; Nugroho, Bintang Noorohmad Wahyu; Anam, Ariq Naufal; Ismayana, Raka Putra; Maulana, Taufiq Ilham
Semesta Teknika Vol 22, No 2 (2019): NOVEMBER 2019
Publisher : Semesta Teknika

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Jembatan kereta api merupakan salah satu prasarana transportasi penting dalam memenuhi kebutuhan manusia. Seiring dengan bertambahnya usia suatu struktur, maka jembatan kereta api juga akan mengalami penurunan kapasitas yang disebabkan oleh faktor internal maupun faktor eksternal. Melihat dari kegunaan jembatan kereta api yang sangat penting, maka dibutuhkan struktur yang kuat serta mampu menjamin keamanan dan keselamatan. Perkuatan merupakan salah satu usaha untuk mengembalikan kapasitas muat suatu struktur sehingga mampu menahan beban yang terjadi. Dalam penelitian ini jembatan kereta api rangka baja tipe warren mengalami penurunan mutu baja sebesar 30%. Analisis dan pemodelan struktur rangka baja menggunakan software SAP2000 V.20 yang kemudian dilakukan perkuatan dengan mengganti elemen-elemen lemah pada struktur rangka baja. Hasil penelitian menunjukan bahwa, nilai mode shapes maksimum setelah dilakukan perkuatan pada arah perpindahan sumbu global X ( UX ) memiliki nilai yang lebih besar 0,072% dari sebelum dilakukan perkuatan yaitu dari 0,825365 menjadi 0,825962. Nilai periode (T) juga mengalami peningkatan sebesar 1,603% dari 0,370023 detik menjadi 0,375957 detik. Lendutan pada tengah bentang jembatan sumbu lokal horizontal searah bidang XY ( U3 ) mengalami penurunan sebesar 32,85% dari 36,437377 mm menjadi 24,467447 mm. Pada evaluasi tegangan, terdapat 25 batang yang mengalami field capacity yang kemudian dilakukan perkuatan dengan mengganti 17 batang dengan memperbesar dimensi profil sehingga seluruh batang tidak mengalami field capacity. Nilai tahanan maksimum pada batang yang tidak aman setelah dilakukan perkuatan menjadi lebih kecil dari 25,324 ton menjadi 23,861 ton dengan kapasitas yang meningkat dari 12,612 ton menjadi 34,824 ton.The railway bridge is one of the important transportation infrastructures in meeting human needs. As a structured age, the railway bridge will also experience a decrease in capacity caused by internal and external factors. Seeing from the use of the railway bridges which is very important, it takes a strong structure and can guarantee security and safety. Reinforcement is an effort to restore the load capacity of a structure so that it can withstand the burden that occurs. In this study, the warren type steel frame railroad bridge experienced a 30% decline in steel quality. Analysis and modeling of steel frame structure using SAP2000 V.20 software which is then performed strengthening by replacing the weak elements in the steel frame structure. The results showed that the value of the maximum mode shapes after the reinforcement in the direction of global X-axis displacement (UX) has a greater value of 0.072% than before the reinforcement is from 0.825365 to 0.825962. Period value (T) also increased by 1.603% from 0.370023 seconds to 0.375957 seconds. Deflection in the middle of the horizontal local axis bridge spread in the direction of the XY (U3) plane decreased by 32.85% from 36.437377 mm to 24.467447 mm. In the stress evaluation, there is 25 frames that experience field capacity which is then strengthened by replacing 17 frames by enlarging the profile dimensions so that all the bars do not experience field capacity. The maximum resistance value on the unsafe stem after reinforcement is smaller than 25,324 tons to 23,861 tons with capacity increasing from 12,612 tons to 34,824 tons.

Perkuatan Struktur Jembatan Kereta Api Rangka Baja Tipe Warren bentang 42 Meter soebandono, Bagus; Nugroho, Bintang Noorohmad Wahyu; Anam, Ariq Naufal; Ismayana, Raka Putra; Maulana, Taufiq Ilham
Semesta Teknika Vol 22, No 2 (2019): NOVEMBER 2019
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.222244

Jembatan kereta api merupakan salah satu prasarana transportasi penting dalam memenuhi kebutuhan manusia. Seiring dengan bertambahnya usia suatu struktur, maka jembatan kereta api juga akan mengalami penurunan kapasitas yang disebabkan oleh faktor internal maupun faktor eksternal. Melihat dari kegunaan jembatan kereta api yang sangat penting, maka dibutuhkan struktur yang kuat serta mampu menjamin keamanan dan keselamatan. Perkuatan merupakan salah satu usaha untuk mengembalikan kapasitas muat suatu struktur sehingga mampu menahan beban yang terjadi. Dalam penelitian ini jembatan kereta api rangka baja tipe warren mengalami penurunan mutu baja sebesar 30%. Analisis dan pemodelan struktur rangka baja menggunakan software SAP2000 V.20 yang kemudian dilakukan perkuatan dengan mengganti elemen-elemen lemah pada struktur rangka baja. Hasil penelitian menunjukan bahwa, nilai mode shapes maksimum setelah dilakukan perkuatan pada arah perpindahan sumbu global X ( UX ) memiliki nilai yang lebih besar 0,072% dari sebelum dilakukan perkuatan yaitu dari 0,825365 menjadi 0,825962. Nilai periode (T) juga mengalami peningkatan sebesar 1,603% dari 0,370023 detik menjadi 0,375957 detik. Lendutan pada tengah bentang jembatan sumbu lokal horizontal searah bidang XY ( U3 ) mengalami penurunan sebesar 32,85% dari 36,437377 mm menjadi 24,467447 mm. Pada evaluasi tegangan, terdapat 25 batang yang mengalami field capacity yang kemudian dilakukan perkuatan dengan mengganti 17 batang dengan memperbesar dimensi profil sehingga seluruh batang tidak mengalami field capacity. Nilai tahanan maksimum pada batang yang tidak aman setelah dilakukan perkuatan menjadi lebih kecil dari 25,324 ton menjadi 23,861 ton dengan kapasitas yang meningkat dari 12,612 ton menjadi 34,824 ton.The railway bridge is one of the important transportation infrastructures in meeting human needs. As a structured age, the railway bridge will also experience a decrease in capacity caused by internal and external factors. Seeing from the use of the railway bridges which is very important, it takes a strong structure and can guarantee security and safety. Reinforcement is an effort to restore the load capacity of a structure so that it can withstand the burden that occurs. In this study, the warren type steel frame railroad bridge experienced a 30% decline in steel quality. Analysis and modeling of steel frame structure using SAP2000 V.20 software which is then performed strengthening by replacing the weak elements in the steel frame structure. The results showed that the value of the maximum mode shapes after the reinforcement in the direction of global X-axis displacement (UX) has a greater value of 0.072% than before the reinforcement is from 0.825365 to 0.825962. Period value (T) also increased by 1.603% from 0.370023 seconds to 0.375957 seconds. Deflection in the middle of the horizontal local axis bridge spread in the direction of the XY (U3) plane decreased by 32.85% from 36.437377 mm to 24.467447 mm. In the stress evaluation, there is 25 frames that experience field capacity which is then strengthened by replacing 17 frames by enlarging the profile dimensions so that all the bars do not experience field capacity. The maximum resistance value on the unsafe stem after reinforcement is smaller than 25,324 tons to 23,861 tons with capacity increasing from 12,612 tons to 34,824 tons.Â

Kajian Kuat Tekan Material Tanah Lempung dan Pasir Berbahan Campur Sampah Plastik Rumah Tangga Taufiq Ilham Maulana
Semesta Teknika Vol 19, No 1 (2016): MEI 2016
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v19i1.1833

In Indonesia, the waste has become a national issue which must be managed in a comprehensive and integrated from upstream to downstream in order to provide economic benefits, healthy for the community, and safe for the environment, and can change people's behavior. From various types of waste, plastic is a very dangerous household waste. One effort to reduce dam use plastic waste is to be made as mixing clay and sand to produce material that can be used as building materials. In this research molten plastic waste was mixed with clay and sand with variations of ratio plastic-sand and plastic-clay is 1: 2, 1: 3 and 1: 4. The results revealed that the optimum ratio of plastic-sand mixture is 1: 3 with a compressive strength of 13.5 MPa and the optimum mix of plastic-clay is 1: 2 with a compressive strength of 14.21 MPa. The collapse pattern that occurred in the plastic-sand mixture was shear failure that caused test object splitting, while the plastic-clay mixture is shear failure, but without causing the test object splitting.

STUDI KUAT TEKAN MATERIAL PASIR BERBAHAN CAMPUR SAMPAH KACA DAN PLASTIK RUMAH TANGGA Taufiq Ilham Maulana
SINERGI Vol 21, No 1 (2017)
Publisher : Universitas Mercu Buana

Indonesia merupakan salah satu penghasil sampah terbesar di Indonesia. Sampah menjadi masalah apabila tidak dapat diuraikan dan menimbulkan masalah derivatif lainnya. Sampah non-organik yang umum berada di Indonesia adalah sampah plastik dan kaca. Dalam penelitian ini, diusulkan alternatif pengurangan sampah rumah tangga berupa plastik dan kaca untuk dijadikan material dengan campuran tanah dan diuji kuat tekannya. Pengujian dilakukan untuk melihat berat jenis dan kuat tekan sampel. Sampel yang dibuat masing-masing berjumlah 3 dengan ukuran kubus dengan sisi 50 mm. Variasi perbandingan campuran sampel plastik : kaca : tanah berturut-turut adalah 1:0,5:2,5 ; 1:1:2; 1:1,5:1,5; dan 1:2:1. Hasil menunjukkan bahwa kuat tekan maksimal yang diraih adalah 14,33 MPa dengan perbandingan 1:0,5:2,5 dengan kegagalan sampel berupa retak diikuti pengelupasan agregat dan dengan penambahan kaca dan pengurangan tanah akan meningkatkan berat jenis tetapi menurunkan kuat tekan. Penelitian ini tidak menargetkan kuat tekan, tetapi memberikan alternatif pengurangan sampah selain menggunakan daur ulang.

STRESS AND DEFORMATION STUDY ON CASTELLATED STEEL BEAM WITH TAPERED SHAPE AND HEXAGONAL OPENINGS Taufiq Ilham Maulana; Bagus Soebandono; Aris Susanti
SINERGI Vol 23, No 1 (2019)
Publisher : Universitas Mercu Buana

Castellated steel beam is a beam with a regular section cut into half with a particular pattern and regrouped with welding to increase its height compared to the original. This structure element has been developed in building constructions since many years ago. However, its uniform section along the span will make the modification no longer effective in cantilever structure, unless it has additional adaptation. Therefore, in this study, it is proposed to use a castellated steel beam with a tapered shape to be applied as cantilever structures. A steel beam with IWF section 150x75x5x7 is the primary sample type in this research. Some variations were made such as openings angle for 450 and 500, openings space for 50 mm, 70 mm, and 90 mm, openings diameter for 50 mm, 75 mm, and 100 mm, and span length for 2 m, 2.5 m, 3 m, and 3.5 m. Two open-source software namely FreeCAD and LisaFEA were used to draw solid 3-dimensional samples and to conduct the numerical analysis to determine stress and deformation respectively. From the result, it is known that the smallest stresses and deformations can be achieved by a different angle of openings, openings space, and diameter for each span length.

Analisis Struktur Bangunan Rumah Tinggal di Desa Jumoyo yang Berisiko Terhadap Banjir Lahar Dingin Gunung Merapi Taufiq Ilham Maulana; Sofyan Sahuri Syarif
Bulletin of Civil Engineering Vol 1, No 1 (2021): Februari
Publisher : Civil Engineering Department, Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/bce.v1i1.11049

Desa Jumoyo merupakan daerah rawan bencana yang salah satunya disebabkan oleh banjir lahar dingin. Banjir lahar dingin dari erupsi Gunung Merapi telah menyebabkan kerusakan bangunan pada pemukiman penduduk, infrastruktur, dan lahan pertanian. Hal ini juga mengakibatkan peningkatan risiko pada keselamatan nyawa manusia yang tinggal di bangunan. Oleh karena itu, bangunan rumah harus mampu memberikan rasa aman bagi penghuninya. Penelitian ini membahas tentang analisis ketahanan bangunan rumah tinggal terhadap banjir lahar dingin yang disusun dalam dua tahapan. Tahap pertama, bangunan rumah tinggal dan penghuninya dianalisia dengan berdasarkan elevasi dari garis kontur dengan menggunakan software QGIS yang bersifat open source dan user friendly. Bangunan yang dianalisa berupa bangunan rumah tinggal satu lantai dan dua lantai. Berdasarkan hasil survei, penghuni bangunan 1 lantai diasumsikan sebanyak 4 orang untuk bangunan lebih besar 72 m2, 8 orang untuk bangunan lebih besar dan atau samadengan 72 m2, dan 6 orang untuk bangunan 2 lantai. Tahap kedua, analisis kegagalan elemen struktur bangunan terhadap tekanan banjir lahar dingin dilakukan menggunakan SAP2000. Jumlah bangunan yang berisiko sebanyak 103 dan jumlah penghuni bangunan diperkirakan sebanyak 664 orang. Jumlah kegagalan elemen struktur bangunan rumah tinggal satu lantai dan dua lantai yang ditentukan oleh ukuran kolom dan balok, serta tinggi tekanan banjir lahar dingin.

Seismic Vulnerability Assessment of Regular and Vertically Irregular Residential Buildings in Nepal Paudel, Satish; Maulana, Taufiq Ilham; Prayuda, Hakas
Journal of the Civil Engineering Forum Vol. 10 No. 2 (May 2024)
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.10316

The need to assess the vulnerability of non-engineered residential RCC buildings in Nepal has become urgent, especially considering the ongoing modifications and additions to these structures without understanding their susceptibility to seismic events. Many residential buildings, particularly those up to three stories, did not fully comply to the guidelines outlined in Nepal Building Code NBC 105:2020. Therefore, there is a necessity to assess the seismic performance of these structures. This study aims to quantify the seismic vulnerability of such buildings by focusing on three distinct types: regular two and three-story structures, and irregular three-story structures. Using finite element modeling, the analysis of the buildings’ seismic capacity was performed through pushover analysis. Subsequently, linear time history analysis is conducted to determine the seismic demand. Two software were utilized to conduct the analyses, namely SAP2000 and STERA_3D. The study also includes the matching eleven strong ground motion inputs to Nepal’s site characteristics and response spectrum to ensure the relevance of the local context. Furthermore, fragility curves are constructed to compare the probability of structural failure, by first conducting the nonlinear dynamic analyses on the building specimens. The result showed that the probability of complete failure rises rapidly when an additional story is constructed with vertical irregularity, increasing from 1.8% to 5.7% in a non-engineered two-story building. The study also observes variations in top displacement across all three buildings due to differences in earthquake duration and frequency. From the findings, it is revealed that a significant increase in seismic vulnerability for vertically irregular buildings compared to regular ones

Pengaruh Ketidakberaturan Bentuk Bangunan Beton Bertulang Bertingkat Tinggi Terhadap Perilaku Seismik Prayuda, Hakas; Maulana, Taufiq Ilham; Putra, Firhan Mahreza Yunanto; Salsabila, Bella; Saleh, Fadillawaty
Jurnal Teknik Sipil Vol 30 No 2 (2023): Jurnal Teknik Sipil
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jts.2023.30.2.17

Abstrak Penelitian ini bertujuan untuk menginvestigasi perilaku bangunan beton bertulang bertingkat tinggi yang memiliki ketidakberaturan bentuk arah vertikal dan horizontal terhadap beban seismik. Ketidakberaturan bentuk bangunan gedung bertingkat tinggi memiliki pengaruh dalam menahan beban gempa. Keterbatasan lahan serta pertimbangan efek eastetik menyebabkan seringkali bangunan bertingkat tinggi didesain tanpa mempertimbangkan ketidakberaturan bentuk. Penelitian ini menggunakan bangunan gedung 12 lantai yang didesain dengan dua tipe ketidakberaturan horizontal yaitu berbentuk T dan U. Masing-masing ketidakberaturan horizontal memiliki 5 variasi ketidakberaturan vertikal, sehingga total variasi pada penelitian ini terdiri dari 10 model. Struktur frame di analisis menggunakan software STERA 3D untuk analisis non-linier dinamik riwayat waktu. Tiga data gempa digunakan sebagai variasi beban seismik untuk masing-masing model yaitu data riwayat waktu gempa El-Centro, Kobe dan Parkfield. Perilaku seismik bangunan gedung yang diinvestigasi pada penelitian ini terdiri dari gaya geser, deformasi lateral, kekakuan bangunan, hubungan gaya geser dasar dengan deformasi, drift ratio dan percepatan maksimum. Hasil analisis numerik menunjukkan bahwa setiap model memiliki perilaku yang berbeda-beda ketika diberikan beban sesimik dan input kualitas material yang sama. Sehingga dapat disimpulkan bahwa ketidakberaturan bangunan arah horizontal dan vertikal sangat mempengaruhi perilaku sesimik bada bangunan gedung beton bertulang bertingkat tinggi Abstract The purpose of this study is to investigate the seismic behavior of high-rise reinforced concrete buildings with irregular shapes in the vertical and horizontal directions. The irregular shape of high-rise buildings has an effect on their ability to withstand earthquake loads. Due to limited area and aesthetic concerns, high-rise buildings are frequently designed without regard for irregular shapes. This study employs a 12-story structure with two different types of horizontal irregularities, namely T and U-shaped. Each horizontal irregularity has five vertical irregularity variations, for a total of ten models in this study. The frame structure was analyzed using the non-linear dynamics time history analysis software STERA 3D. Three earthquake data sets were used to generate seismic load variations for each model: the El-Centro, Kobe, and Parkfield earthquakes. The seismic behavior of the building investigated in this study included shear force, lateral deformation, stiffness of the structure, the relationship between base shear force and deformation, drift ratio, and maximum acceleration. The numerical analysis results indicate that each model behaves differently when subjected to the same seismic load and input material quality. Thus, the irregularity of the horizontal and vertical directions has a significant effect on the seismic behavior of high-rise reinforced concrete buildings.

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