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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL Jurnal Mahasiswa Jurusan Teknik Sipil Rekayasa Sipil Jurnal Teknik Sipil APPLIED RESEARCH ON CIVIL ENGINEERING AND ENVIRONMENT (ARCEE) Journal of Infrastructure Planning and Engineering Jurnal Pengabdian Masyarakat Bangsa
Alfinna Mahya Ummati, Alfinna Mahya
Department Of Civil Engineering, Institut Teknologi Sumatera, Lampung Selatan, 35365, Indonesia
Agriculture, Biological Sciences & Forestry Arts Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation

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KUAT GESER PANEL BETON BERTULANG BAMBU LAPIS STYROFOAM DENGAN BEBAN IN-PLANE Ummati, Alfinna Mahya; ., Wisnumurti; Naingolan, Christin Remayanti
Jurnal Mahasiswa Jurusan Teknik Sipil Vol 1, No 2 (2015)
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (673.192 KB)

Abstract

Beton merupakan material penting dalam dunia konstruksi, penggunaannya lebih banyak digunakan untuk struktur utama seperti plat, balok, kolom, dan pondasi. Banyak sekali keuntungan dari beton untuk bahan konstruksi, namun massanya yang sangat besar menyebabkan beton memiliki bobot yang dapat mempengaruhi tanah dibawahnya. Inovasi untuk menciptakan beton ringan dilakukan dengan mengganti beberapa bagian beton dengan bahan lain yang lebih ringan, misalnya Styrofoam. Penelitian ini dilakukan dengan membuat sebuah panel dimana terdapat beberapa bagian beton yang diganti dengan Styrofoam, tulangan panel terbuat dari bambu yang dilapisi dengan cat. Panel ini akan dibandingkan dengan panel yang sama namun tanpa Styrofoam. Kedua panel diuji lentur dengan beban in-plane dan hasil pengujian keduanya dibandingkan. Beban maksimal yang dihasilkan oleh keduanya menunjukkan hasil yang hampir sama, yaitu untuk panel tanpa Styrofoam sebesar 5500 kg dan untuk panel dengan Styrofoam sebesar 5533 kg. Untuk panel tanpa Styrofoam memiliki kekuatan geser 2750 kg dan kekuatan geser untuk panel dengan Styrofoam 2766.667 kg. Perbedaan yang cukup signifikan ditunjukkan pada tegangan geser yang dihasilkan yaitu untuk tanpa Styrofoam 20.625 kg/cm2 dan untuk panel dengan Styrofoam 26.673 kg/cm2. Keruntuhan yang dihasilkan oleh kedua panel merupakan jenis keruntuhan lentur. Hasil penelitian menunjukkan bahwa panel yang didalamnya diletakkan Styrofoam memiliki kekuatan yang hampir sama dengan panel tanpa Styrofoam. Kata kunci : panel, dinding, bambu, Styrofoam, in-plane.
Stress analysis of four-story building to detect the crack location under the earthquake loading Alfinna Mahya Ummati
Journal of Infrastructure Planning and Engineering (JIPE) Vol. 1 No. 2 (2022)
Publisher : Master Program of Infrastructure and Environmental Engineering, Postgraduate Program, Warmadewa University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (968.522 KB) | DOI: 10.22225/jipe.1.2.2022.60-67

Abstract

A 3D frame element modelling conducted in order to identify the crack location of the educational building on South Lampung City. Many cracking visually appeared in a building and many of leaking observed that the building performs an over displacement. This research proposed an analysis in order to detect the crack location due to the building’s overstressed before and under the certain earthquakes loading. First, the building subjected to the deadload and service loading and was found that the building in a health condition and there is no cracking identified. Second, an El-Centro earthquake normalized and fitted with the site location and loaded to the building. Under 200-gal earthquake which similar to MMI scale VI to VIII with the moderate damage that possibly occur in Lampung, the crack detected in all member of the building, either major or minor cracking. This research proposed the method which considerable to use in observing the cracking location, generally.
Peran Pivot Hooks dalam Peningkatan Kapasitas Lentur pada Balok Beton Bertulang Bambu Ummati, Alfinna Mahya; Michael, Michael; Sarassantika, I Putu Ellsa; Fanna, Gibral Tariq; Syuhada, Syahidus; Bayzoni, Bayzoni; Nasution, Ade Prayoga
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 29, Nomor 2, DESEMBER 2023
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v29i2.48288

Abstract

Some researcher missed the role of hooks in their bamboo reinforcement. Consequently, the bamboo reinforcement and concrete used to have slip and failure to composited, this make the concrete and bamboo working independently to sustain the given loading and the bond failure become the main issue than the beam failure. This research studied about the role of the pivot hooks that capable to enhance the loading capacity higher than the beams without the pivot hooks. Experimental test performed in order to identify the effect of the pivot hooks presence which added to the flexural reinforcement which made by bamboo materials to avoid the bond slip failure that mostly occur in the bamboo reinforced concrete beams. The experimental test which verified by the numerical analysis by FEA NX commercial software proof that the pivot hooks are able to increase the loading capacity of a concrete beam 33% - 40% higher than the bamboo reinforcement without the pivot hooks. Architectural façade and budget efficiency caused the bamboo become unavoidable material in construction, by adding the structure modification such as the pivot hooks for the bamboo reinforcement, the failure can be reduced, then the entanglement of bamboo in construction become more functional.
OPTIMIZING SUSTAINABLE GEOPOLYMER PRODUCTION: INTERGRATING REACTIVE ULTRAFINE FLY ASH (RUFA) AND RECYCLED FINE AGGREGATE (RFA) Setiawan, Preza; Wei, Ting Lin; Ummati, Alfinna Mahya; Wirawan, Nugraha Bintang
Applied Research on Civil Engineering and Environment (ARCEE) Vol. 6 No. 01 (2025): Material Technology and Digitalization
Publisher : POLITEKNIK NEGERI JAKARTA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/arcee.v6i01.6638

Abstract

Construction waste presents considerable risks to human health, safety, and the environment, alongside escalating expenses related to waste management and carbon emissions. Cement manufacturing provides a substantial share of carbon emissions within the construction sector. Geopolymers present a sustainable substitute for conventional cement-based concrete, capable of reducing CO2 emissions and promoting a circular economy. This study investigates the incorporation of Reactive Ultrafine Fly Ash (RUFA) and Recycled Fine Aggregates (RFA) in the production of geopolymers to create sustainable construction materials. The study investigates the physical characteristics, setting time, fluidity, compressive strength, and microstructure of RUFA geopolymers with varying quantities of RFA. The results indicate that incorporating RFA improves compressive strength, with peak results at 40% RFA content. Furthermore, RFA decreases setting time to a specific limit, beyond which additional quantities have negligible effects. Fluidity is maximized in RFA mixtures at 30%, subsequently declining. Scanning electron microscopy analysis revealed microstructural enhancements and increased density in 40% of RFA samples. Statistical analysis indicates the substantial impact of RFA content and sample age on compressive strength. This research offers significant insights into developing sustainable construction materials and underscores the necessity of carefully selecting RFA content. Future research may investigate various combinations and parameters for wider applications in sustainable construction practices.
Pendampingan Teknis Perencanaan Perkuatan Struktur Power House PLTU Tarahan dengan Bracing dan Analisis Levelling Time History Yudi, Ahmad; Alexander, Rionaldo; Kirtinanda. P, Kirtinanda. P; Apriwelni, Siska; Ummati, Alfinna Mahya; Nadi, Muhammad Abi Berkah; Maini, Miskar
Jurnal Pengabdian Masyarakat Bangsa Vol. 3 No. 1 (2025): Maret
Publisher : Amirul Bangun Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59837/jpmba.v3i1.2171

Abstract

Kegiatan pengabdian ini bertujuan untuk menganalisis efektivitas perkuatan struktur bangunan terhadap beban gempa melalui pemasangan bracing. Beban gempa yang digunakan dalam analisis time history adalah gempa Kobe. Kegiatan ini mengevaluasi kinerja struktur dengan mempertimbangkan percepatan awal gempa (Aog) secara nonlinear menggunakan metode Levelling Time History. Analisis dilakukan dengan meningkatkan Aog hingga elemen struktur tidak mampu lagi menahan gaya geser dan beban, serta mengalami kerusakan parah atau mencapai kondisi Collapse Prevention (CP). Hasil analisis menunjukkan bahwa pada kondisi eksisting, struktur mengalami kegagalan sebelum pemasangan bracing. Hal ini terlihat dari perbandingan nilai base shear, periode getar, partisipasi massa, simpangan antar lantai, serta rasio kapasitas momen kolom-balok sebelum dan sesudah pemasangan bracing. Berdasarkan kriteria kinerja struktur menurut FEMA 356, bangunan ini masih tergolong aman terhadap gempa Kobe dengan indikator Immediate Occupancy (IO) berdasarkan pengecekan sendi plastis untuk arah X dan Y. Setelah dilakukan perkuatan, analisis rotasi dan simpangan maksimum menunjukkan bahwa struktur mampu menahan gempa hingga 6×Aog untuk arah X dan 8×Aog untuk arah Y sebelum mengalami kegagalan pada balok dan kolom. Dengan demikian, pemasangan bracing terbukti meningkatkan ketahanan struktur secara signifikan, berfungsi sebagai pengaku, dan memperkuat kekakuan serta stabilitas bangunan.
Kontrol Deformasi Berlebih akibat Beban Gempa pada Struktur Gedung Bertingkat dengan Penambahan Curved Damper pada Bangunan Ummati, Alfinna Mahya; Hasundungan, Andrew Putra
Jurnal Teknik Sipil Vol 31 No 1 (2024): Jurnal Teknik Sipil - Edisi April
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jts.2024.31.1.11

Abstract

Abstrak Pada tahun 2017, Hsu dkk memperkenalkan peran curved damper untuk mengurangi deformasi pada struktur portal penahan momen dengan beban siklik, curved damper dapat meningkatkan performa struktur yang bergantung pada Panjang dan sudut lengkung kurva damper. Terinspirasi dari model ini, penelitian ini mempelajari tentang peran dari curved damper jika diaplikasikan pada struktur bangunan bertingkat dengan beban gempa yang pernah terjadi. Curved damper yang diasumsikan dengan multilinear link element ditempatkan pada setiap sudut kerangka bangunan pada setiap lantai, deformasi yang terjadi dibandingkan baik sebelum dan setelah terpasangnya curved damper. Sebanyak lima titik ditinjau untuk mengamati perubahan deformasi yang terjadi dan penelitian yang dilaksanakan telah menunjukkan bahwa curved damper dapat menurunkan deformasi struktur hingga 63% akibat beban gempa yang telah dinormalisasi. Penelitian ini menunjukkan bahwa curved damper dapat dipertimbangkan untuk digunakan dalam rangka pembangunan struktur resilien terhadap gempa. Penelitian ini merupakan penelitian awal untuk selanjutnya curved damper disimulasikan dengan curved frame pada struktur. Kata-kata Kunci: Bangunan, curved damper, deformasi, gempa, link element Abstract The previous study proposed the role of curved damper to reduce deformation of the moment resisting frame subjected to the cyclic load, curved damper able to improve the structure performance regarding the length and arc angle. Inspired by this model, this research studied about the role of curved damper if it applied to the real structure with the real seismic loading. Curved damper which assumed as multilinear link element placed on the corner of the frame of each story then compared before and after the damper existing. 5 locations point out to observed the structure deformation and it was shown that the curved damper capable in reducing the deformation subjecting the normalized earthquake loading up to 63%. This research shows that curved damper is considerable to use in order to build the earthquake resilient building. This simplified modelling of the curved damper as the preliminary analysis for the curved geometry of the curved damper for further research. Keywords: Building, curved damper, deformation, earthquake, link element
Curved Damper as Structural Retrofitting Element to Improve the Performance of Steel Truss Bridge Ummati, Alfinna Mahya; Wirawan, Nugraha Bintang; Halim, Hendra
Rekayasa Sipil Vol. 18 No. 1 (2024): Rekayasa Sipil Vol. 18 No. 1
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2024.018.01.1

Abstract

The curved damper can control the structure movement by a physical approach to reduce the lateral deformation under the earthquake, which previously proved to be a significant improvement when applied on a moment-resisting frame in a laboratory scale experiment. With the same idea, a curved damper is considered a passive control to reduce the excessive deformation for a single span of a steel truss bridge, which is analyzed by finite element modeling to evaluate the role of the curved damper in a complex structure. The study of curved dampers applied in this typical bridge showed that mid-span deformation can be mitigated by up to 62% under an earthquake. Hence, a structure with a curved damper is recommended for application in high seismic locations.
Co-Authors Ahmad Yudi Alexander, Rionaldo Apriwelni, Siska Bayzoni Bayzoni, Bayzoni Christin Remayanti Naingolan, Christin Remayanti Fanna, Gibral Tariq Halim, Hendra Hasundungan, Andrew Putra I Putu Ellsa Sarassantika Michael Michael Miskar Maini Nadi, Muhammad Abi Berkah Nasution, Ade Prayoga Nugraha Bintang Wirawan, Nugraha Bintang P Kirtinanda Setiawan, Preza Syahidus Syuhada Wei, Ting Lin Wisnumurti .