Article Per Year (5 Year)
p-Index From 2021 - 2026
16.435
P-Index
This Author published in this journals
All Journal Jurnal Teknik Sipil Journal of the Indonesian Mathematical Society Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan Jurnal Rekayasa Jurnal Rekayasa Sipil dan Desain Teras Jurnal Jurnal Medik Veteriner Martabe : Jurnal Pengabdian Kepada Masyarakat Vitek : Bidang Kedokteran Hewan Jurnal Ilmiah Fillia Cendekia Veterinary Biomedical and Clinical Journal Journal of Engineering and Scientific Research (JESR) Journal of Infrastructural in Civil Engineering (JICE) Jurnal Profesi Insinyur Universitas Lampung Jurnal Rekayasa Lampung (JRL) Seminar Nasional Insinyur Profesional (SNIP) Prosiding Seminar Nasional Hasil Penelitian Sains, Teknik dan Aplikasi Industri Fakultas Teknik Universitas Lampung Jurnal Ilmia Widya Pustaka Pendidikan Jurnal Pendidikan Indonesia (Ju-Pendi) PESHUM Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Nemui Nyimah
Ratna Widyawati
Universitas Lampung
Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mathematics Medicine & Pharmacology Social Sciences Transportation Veterinary Other

Published : 156 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 156 Documents
Search

 12   13   14   15   16 
The Deformasi perkerasan kaku pada usia dini: Deformation of rigid pavement at an early age Diego Maradona Maharduta Diego; Chatarina Niken; Ratna Widyawati
REKAYASA: Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol. 28 No. 3 (2024): Desember 2024
Publisher : Jurusan Teknik Sipil Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/rekrjits.v28i3.114

Abstract

Sering ditemui keretakan pada perkerasan kaku. Salah satu penyebabnya ialah retak yang disebabkan oleh susut yang tidak mampu diakomodasi beton. Bila susut usia dini tidak bisa diakomodasi, maka resiko penurunan kinerja menjadi lebih besar. Tujuan penelitian ini adalah untuk mengetahui deformasi yang terjadi pada jalan beton di Provinsi Lampung, Indonesia sejak pengecoran sampai beton berumur 24 jam. Sampel penelitian berupa perkerasan kaku berukuran 5000×4500×300 mm dengan fs’ 4,5 MPa dan f”c 25 Mpa yang merupakan jalan tol sesungguhnya. Curing beton dilakukan dengan cara menyelimuti beton dengan geotextile dan dibasahi setiap 2 jam sejak beton berusia 13 jam 30 menit. Metode penelitian yang digunakan adalah observasi dan wawancara. Alat yang digunakan pada penelitian ialah Vibration Wired Embedded Strain Gauge (VWESG) dan penelitian dilakukan selama 24 jam sejak beton dicor. Analisis data pada penelitian ini menggunakan analisis deskripsi hasil pengamatan dan pengukuran. Hasil penelitian menunjukkan bahwa deformasi beton yang terjadi pada perkerasan kaku di Indonesia dari yang terbesar hingga yang terkecil secara berurutan dimulai dari bagian tengah, bagian sisi panjang, bagian sisi pendek, lalu bagian sudut segmen.
Analisis Desain Gedung Whiz Hotel Metode Sistem Rangka Pemikul Momen Khusus nadeak, lexono x; Suyadi, Suyadi; Widyawati, Ratna
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 4 No. 3 (2016): Edisi September 2016
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v4i3.448

Abstract

AbstractSpecial Moment Resisting Frame System(SMRFS) is a system with the highest ductility and that has detail requirements in the calculation of structural reinforcement components of axial, bending and shear of beam and columns elements, as well as provisions regarding the beam column connection that will affect the overall performance building when receiving earthquake load. This study aims to determine the detail requirements of special moment resisting frame system in accordance with SNI 2847-2013 and performance evaluation of structures with pushover analysis. Based on study results, the level of structure performance in accordance with the performance point obtained shows that the values of the displacement target are 0.042 m in x-direction and 0.413 m in y-direction. The value of the performance point also shows that the building is designed in the Immediate Occupancy condition that is while the building receives the earthquake load, it is expected that the structure will not be damaged. Distribution of plastic hinge is appropriate to the expectation that is the strong column and the weak beam because plastic hinge formation begins from the beam element then the column element. From the pushover analysis, it is obtained the value of the actual reduction factors (R) are 8.9 in x-direction and 7.8 in y-direction, while the values of the actual system over strength factor (Ωo) are 4.34 in x-direction and 5.70 in y-direction and the values of actual deflection magnification factor (Rd) are 5.9 in x-direction and 5.2 in y-direction.Keywords : pavement distress types, severity level, PCIAbstrakSistem Rangka Pemikul Momen Khusus (SRPMK) merupakan sistem dengan daktilitas tertinggi dan memiliki persyaratan yang detail dalam perhitungan penulangan komponen struktur aksial, lentur dan geser untuk elemen balok dan kolom, serta ketentuan mengenai hubungan balok kolom yang akan mempengaruhi kinerja bangunan secara keseluruhan ketika menerima beban gempa. Penelitian ini bertujuan untuk mengetahui detail persyaratan sistem rangka pemikul momen khusus sesuai dengan SNI 2847-2013 dan evaluasi kinerja struktur dengan pushover analysis. Berdasarkan hasil studi, level kinerja struktur sesuai dengan titik kinerja yang didapat menunjukkan nilai dari target perpindahan untuk arah x sebesar 0,042 m dan arah y sebesar 0,413 m. Nilai dari titik kinerja juga menunjukkan bahwa bangunan yang di desain berada pada kondisi Immediate Occupancy dimana kondisi gedung saat menerima beban gempa diharapkan struktur tidak akan mengalami kerusakan. Distribusi sendi plastis sesuai yang diharapkan yaitu kolom kuat dan balok lemah karena terbentuknya sendi plastis diawali dari elemen balok terlebih dahulu kemudian diikuti elemen kolom. Dari hasil analisis pushover didapat nilai faktor reduksi gempa (R) aktual arah x sebesar 8,9 dan arah y sebesar 7,8, sedangkan nilai faktor kuat lebih sistem (Ωo) aktual arah x sebesar 4,34 dan arah y sebesar 5,70 dan nilai faktor pembesaran defleksi (Rd) aktual arah x sebesar 5,9 dan arah y sebesar 5,2.Kata kunci : SRPMK, titik kinerja, sendi plastis, analisis pushover
OPTIMALISASI PROFIL BAJA IWF PADA BANGUNAN GUDANG KONSTRUKSI GABLE FRAME BERDASARKAN SNI 1729:2015 Putri, Ardini Yuliastri; Bayzoni, Bayzoni; Widyawati, Ratna
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 5 No. 2 (2017): Edisi Juni 2017
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v5i2.677

Abstract

The increasement and development of economic growth in Indonesia cause increasement of the construction of warehouse to support business expansion. However, there is an opinion about expensive steel prices which is causes the use of the steel its self is not optimum. In this case, there must be a calculation to determine the model of gable frame and the dimension of steel profiles for the warehouse.  In this study, the frame model is limited of four types that have differences in haunch span.  This study also use the Direct Stiffness Method to calculate structural analysis and  SNI 1729: 2015 to calculate section analysis.  From structural and section analysis, obtained weight for each type of frame.  Frame Type 1 has 4.771,89 kg, Frame Type 2 has 3.348,18 kg, Frame Type 3 has 3.682,24 kg and Frame Type 4 has 10.541,1506 kg.  Based on the volume and weight calculation in each frame type, Frame Type 2 has the lowest weight. Hence, this type of portal can be considered as the most optimum portal type. Key word : gable frame construction, SNI 1729: 2015, Direct Stiffness Method
Perbandingan Volume Rangka Kayu Pada Pembuatan Rangka Atap Kuda-Kuda Bentang 8 (Delapan) Meter Berdasarkan SNI 7973-2013 Darmawan, Rizqi; Husni, Hasti Riakara; Widyawati, Ratna
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 6 No. 2 (2018): Edisi Juni 2018
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v6i2.823

Abstract

AbstractThe roof frame is a building structure that is above ringbalk. The roof frame serves as a retaining roof from pressure provided by the roof . Constructs of trusses are generally made of the same type and dimensions of wood use for short, medium, or long spans. Therefore, it needs analysis wood requirement of truss. This study aims to determine the dimensions and volumes of truss and compare volume of efficient timber requirements of the planned. In this research,volume requirement analysis of truss.The first, selection of wood used in the span of 8 meters. Then make 4 types of truss. Then, load analysis using SAP2000 to get the force. Having obtained value of force, then performed an analysis of the pull force and press so that the dimensions used are safe. Furthermore, the calculation of the volume of wood demand on each type of the planned, so that obtained efficient comparison volume of the 4 types.In the analysis, the dimensions of each type are type 1 (6/6 cm, 6/8 cm, 8/8 cm and 8/10 cm), type 2 (4/6 cm, 6/8 cm, and 8/8 cm), type 3 (4/6 cm and 6/8 cm) and type 4 (4/6 cm, 6/8 cm, and 8/10 cm). Then the volume of wood demand on type 1 (0,2038 m3), type 2 (0,1383 m3), type 3 (0,1229 m3), and type 4 (0,1797 m3). Based on the stem rod analysis, it was concluded that the most efficient roof truss type of the 4 types, namely the 3rd type.Keywords: Roof frames, truss, volume of wood
Analisis Investasi Rekayasa Proyek Pembangunan RS PTN Universitas Lampung Ambarwati, Anissa Putri; Kustiani, Ika; Widyawati, Ratna
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 6 No. 4 (2018): Edisi Desember 2018
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v6i4.1081

Abstract

The establishment of RS PTN Unila is intended to fulfill social function by provided health services as well as income generating unit. RS PTN Unila is also expected to be a center of collaboration between research and health services. Even though the facility is provided by government of the province of lampung, The study was carried out to examine the viability of the invested. The viability was analyzed through several parameter, named Net Present Value (NPV), Benefit to Cost Ratio (BCR), Internal Rate of Return (IRR), Payback Period (PP).The viability was also analyzed through 9 scenarios. Scenarios were varied base on inflation rate and Bed occupancy rate. The result show that all scenarions was viable. The best scenarions was based on the assumptions of bed occupancy rate 100%, inflation rate of 5 % and discount rate 15% and the source of investment provided by government. Keyword: Feasibility Study , Net Present Value (NPV), Benefit Cost Ratio (BCR), Internal Rate of Return (IRR), Payback Period (PP)
Evaluasi dan Perkuatan Struktur Pelat, dan Dinding Geser dengan Glass Fiber Reinforced Polymer (GFRP) Turnip, Stephanus Martua; Alami, Fikri; Widyawati, Ratna
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 7 No. 1 (2019): Edisi Maret 2019
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v7i1.1118

Abstract

The Education hospital building of University of Lampung has been stalled and the construction is abandoned for years. So that, there is concern about the existing strength installed in the field. Therefore, it is necessary to evaluate and to strengthen the structure for increasing the strength and assuring appropriateness of the building. Two methods used in evaluating this building which weredirect survey method in the field and numerical method used the Finite Element Analysis (FEA) program. For strengthening calculations the American Concrete Institute code was applied (ACI 440.2R, 2008). The material for strengthening used Glass Fiber Reinforced Polymer (GFRP). The results showed that the existing concrete compressive strength on all structural elements decreased from the design which was 25 MPa. However, theexisting steel reinforcement tests showed good strength which greater than design strength of 400 Mpa.In strengthening calculation with GFRP type of SEH-51A which has tensility strength of 460 MPa, the material can increase flexural strength of several slabs that requiredfor strengthening. In addition, in the shear wall analysis, it concluded that the existing shear wall were strong enough to withstand the nominal shear forcesdesign that might be occured. Keywords : Structures Evaluation, Strengthening Structures, Glass Fiber Reinforced Polymers, Concrete Slab and Shear Walls.
Co-Authors Abdul Latief Gunawan Abdullah, Habib Ilham Achmad Dinan Agustian Achmad Samudra Ade Suprizal Adi , Amir Kerisna Ahmad Farid Effendy Ahmad Sahara Aini , N Aleksander Purba Alexander Purba Alexander Purba Ambarwati, Anissa Putri Amilia, Rahma Aminudin, Aminudin Aminudin, KM Andi Hermawan Andi Kusnadi Andika Wiratama Suparto Andini Frananda Andri Yulianto Anggarani Budi Ribowo Anissa Putri Ambarwati Apriansyah KM Aprilia Wijaya Apritya, Desty Ardiansyah Ardiansyah Ardini Yuliastri Putri ARI DAMAN HARIS Arief, Eldowan Ariesanthy, Yenni Aritonang, Erfan Andrianto Arlinsyah Arlinsyah Aryan Saruhian Awaludin Yoga Aziz, Sholhan Bayzoni Bayzoni Bayzoni Bayzoni, Bayzoni Bele, Alexander Joharry Leto Budhi Dharma Chatarina Niken Chatarina Niken Cheria Ayu Aditya Choiriyyah, Nova Darmawan, Rizqi Dayanti, Ika Ayu Anita Dedi Pria Armada Deni Danial Diego Maradona Maharduta Diego Dikpride Despa Dikpride Despa Dikpride Despa Dikpride Despa Dikpride Despa Dikpride Despa Dikpride Despa Diky Ramadhan Dimas, Muhammad Seriz Djawa, Marselinus Ndilu Landu Doni Irawan Efransyah Eko Widiyanto Endang Wahyuni Fachrial Ikram Ayusar Fahmi Farhan Nurrohmat Fauzi Antoni Antoni Febriani, Sylvawiedya Meutia Fikri Alami Fikri Alami Fikri Alami Firdha, Risty Amelia Firmansyah Firmansyah Novandaya Firnawati Sakalena Fitra, Rifandy Fransiska, Reissa Yunia Ghalih Huriarto Girinandi, I Goentur Permata Hanafi Grady Suharyono, Ivander Gusrian Putra Habib Ilham Abdullah Habibi , Budi Muhammad Habibi, Budi M. Habibi, L Hadi, Ayatullah Hanaf Qowiyyul Adib Hanafi, Goentur Permata Hartopo, Popo Haryono Haryono Hasti Riakara Husni Hasti Riakara Husni HENI FITRIANI Herianto Herry Wardono Heru Purnomo Ibrahim , Eddy Ihwan Ika Kustiani IMAM SANTIKO RAHARJO Inayati Nurlaili Indra Alfandi Ramlie Ishak Iskandar Pani Isneini, M Isneini, Mohd Jaya, Eka Putra Junianto Wika Adi Pratama Karyatama , Coco Cesar Kasy, Ferrini Kekang, Yosefi Yuanita Kristanto Usman Kumar, Hetzy Mericuri Kurnia Pawestri Primastuti Kurniawan, M. Tito Laksmi Irianti Laksmi Irianti Lanosin Lenggana, M. Kendy Leo Hari Wiryanto lexono x nadeak LOPULALAN, MARCELLO Lusmeilia Afriani Lusmeilia Afriani M Sarkowi Mardhotillah, Nur Anisa MARDIANA Mardiana Mardiana Marsela Irnawati Nuwa Masdar Helmi Matemba, Esther Elly Mebro, Helson Meiza, Ricky Melwi Melwi Mohammad Syafrizal Mohd Isneini Mohd. Isneini Mohd. Isneini Muh Sarkowi Muh. Sarkowib Muhamad Hafiz Muhammad Habibie B. Muhammad Ridho Saputra Muhammad Sarkowi Muhammad Seriz Dimas Murdapa, Fauzan Murni Muslichah, Ajeng Dafiq N.S, Masri nadeak, lexono x Nasution, Ali Napiah Ningsih, Jeni Yunita Noor Rahman, Muhammad Noor Sulistiyono Notodarmojo , S NOVA CHOIRIYYAH Nur Dewisri Fatihawati Nur ‘Azah Nurrohmat, Farhan Nurul Hidayah Otten Rinaldi Parliansyah, Parliansyah Prigato, Teja Putra, Asyrofi Miranda Putra, M Darmawan Putra, Rivaldo Hartono Putri, Ardini Yuliastri Quinta Normalita Radiansyah, Rizki Rahmad Syah Putra Rahman, Muhammad Noor Rahmanisa, Laila Indah Ramadhan, Vernady Napatino Ratrianto, Ratrianto Ratu Chintami Ria Oktaviani Sinia Rifki Imanuddin Kunto Rio Trianto RIO, M. ROMA Rio, Roma Ristama, M Alvany Veschonanda Risty Amelia Firdha Riyan Rahmawan Rizal Ardiana Rizal Ayodya Hapsoro Rizal Hermansyah Rizqi Darmawan Sabila, Thifan Arel Sandewa, Ricky Santoso, Teguh Ilman Saputra, Fauzi Saputra, Muhammad Ridho Sarinurrohman Sarkowi Satria, Fungky Andi Sep, Trisya Setiawan, Riesal Sibuea, Lungguk Sidarto, K Adji Silvia Ruhma Dewi, Niky Siti Nurul Khotimah Sri Waluyo Stephanus Martua Turnip Sugianto Sugianto Suharno Suharno , Suharno Sultan , Masri Nur Surahman, R Surya Sebayang Surya Sebayang Surya Sebayang Susanti, Sevi Susanto, Rino Abi Susilo, Hendri Suyadi Suyadi Suyadi Suyadi Taufik Muhtarom Taufik Qurrahman Trisya Septiana Turnip, Stephanus Martua Utami, Faradina Veithzal Rivai Zainal Vera Agustriana Noorhidana Vika Farida Wahyu Kurniawati Wahyudi, Ahmat Wardhani Lailia Dwi Kusuma Werena, Rosalia Dwi Widiastuti, Ari Widiatmoko , Laksi Widjatmoko, Eko Nugroho Yanuar Aulia Kamal Yolanda, Sylvia Yoriska Indah Sari YUDHO JOKO PRESETYO Yulyah Agustina Yunani, Retina Zahra, Ainaya Maudia ZUBAIDI ZUBAIDI1 Zulfi, M. Ichfan