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All Journal Jurnal Teknik Sipil dan Perencanaan Civil Engineering Journal BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Jurnal Riset Rekayasa Sipil Mekanika: Majalah Ilmiah Mekanika Matriks Teknik Sipil
Fitri, Siti Nurlita
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Engineering Environmental Science Materials Science & Nanotechnology Transportation

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Perkuatan Oprit Jembatan Kali Jubang Jalan Tol Pejangan - Brebes Timur menggunakan Geotekstil Fitri, Siti Nurlita
BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 9 No 1 (2021): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v9i1.2255

Abstract

The Kali Jubang Bridge, located on the Pejagan Toll Road, West Brebes, Indonesia, has oprit-embankment elevation of 7m. The soil structure in the area around Kali Jubang is the soft-brownish clay. Soft clay has a low bearing capacity and high compressibility. Therefore, these issues caused the occurrence of landslides, broken bridge plates, and different surface level which causes bumpy pavement and danger to road users. Hence, it is necessary to reinforce the oprit of the Kali Jubang. The design of geotexstile was conducted to improve the bearing capacity by using a geotextile with tensile strength (Tult) of 150 kN/m2. Results found that the initial embankment (Hinitial) was 8.9 m to anticipate the 1.9 m consolidation decrease . The geotextile was designed with 35 layers using a layer thickness of 0.25m, a top fold length of 1m, and an appropriate length for the width of the embankment for each layer.
Slope Reinforcement Design for Balikpapan-Samarinda Toll Road Landslide Section 28+000 To 28+100. Fitri, Siti Nurlita; Diputra, Marbono Widya
Jurnal Teknik Sipil dan Perencanaan Vol 25, No 2 (2023)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v25i2.46383

Abstract

The Balikpapan - Samarinda Toll Road is a new infrastructure project that connects two capital cities in East Borneo. Landslides occur in sections 28+000 to 28+100, necessitating the terrace design to prevent unstable conditions. As a result, a new proposed design is required to ensure safety in this area. This study aims to offer further slope reinforcement in this location to prevent landslides. This research utilizes secondary data from Standard Penetration Test (SPT) results to determine the soil properties. First, the lateral earth pressure was conducted to calculate the sheet pile and retaining wall structure. The other reinforcement is geogrid with geotextile combine. The Finite element model carried out all the overall stability with Plaxis calculation. The results show that all new proposed to generate the safety factor value 1.3. Sheet pile variations present the CCSP type W-600 with a total length reaching 17m, which offers a safety factor 1.31. The second variation is a retaining wall with a full height of 5m and combined in sheet pile design, which reaches the safety factor in the overall stability of 1.498. the internal strength of the retaining wall is divided into three categories: overturning, sliding, and bearing capacity with 1.55, 2.44, and 2.88, respectively. Meanwhile, the geogrid type described the SF 1.32 with three step slope design and spacing of 0.3m, 0,5m, and 1,0m, respectively. 
Analysis of Tetrachiral Sandwich Structures at High-Velocity Impact: Influence of the Applied Material and Projectile Core Geometry Maulana, Sultan; Prabowo, Aditya Rio; Wibowo, Wibowo; Do, Quang Thang; Muttaqie, Teguh; Muhayat, Nurul; Fitri, Siti Nurlita
Civil Engineering Journal Vol 10, No 10 (2024): October
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2024-010-10-017

Abstract

This research involved ballistic impact analysis on a tetrachiral sandwich structure in which the shapes of the circular nodes in the tetrachiral core are modified into polygonal shapes, namely a square, hexagon, and octagon. The objectives of this study were to observe the effect of a modified sandwich tetrachiral structure core, investigate the effect of the projectile geometry, and calculate the material performance of the structure. This research was conducted using numerical analysis utilizing the finite element method. The simulation methodology was validated through a benchmarking study, the results of which showed an error below 6%. The findings show that the material with the best performance was Armox 500T, at 5033 J. The most difficult projectile to withstand was conical, followed by ogive, hemispherical, and blunt. The results of the core modification on the tetrachiral sandwich structure show that the octagonal core had better energy absorption, by 2.8%, compared to the circular core. Modifying the node geometry in the tetrachiral core and then analyzing it with stress and strain contours are the novel aspects of this research. Doi: 10.28991/CEJ-2024-010-10-017 Full Text: PDF
Comprehensive Assessment for Liquefaction Vulnerability in Indonesia: Empirical and Element Simulation Approaches Fitri, Siti Nurlita; Sawada, Kazuhide
Civil Engineering Journal Vol 11, No 1 (2025): January
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2025-011-01-019

Abstract

Historical liquefaction events have occurred at many locations, such as Yogyakarta and Lombok; the most significant flow side is in Palu. The standard Indonesian liquefaction assessment is based on a simplified empirical analysis. However, these methods only occasionally yield appropriate results. Contrastingly, the limited data from the cyclic test ensured that the liquefaction ratio could only partially support the liquefaction vulnerability. This research aims to re-examine the empirical approach that combines the constitutive model using LIQCA with a cyclic triaxial test (CXT) and cyclic simple shear (CSS). The empirical method was arranged using deterministic and probabilistic approaches, and the recommendation of the peak ground acceleration (PGA) threshold was validated. The results show a strong relationship between all calculation methods and the SPT value, which differs in the liquefaction strength ratio. This output offers the PGA recommendation results, reaching a 48% overestimation from the empirical method without considering the cyclic test. This research presents the development of a combination of the empirical method with the element simulation from CXT and CSS. This offers a comprehensive overview of the Indonesian requirement standard assessment for liquefaction vulnerability analysis. Doi: 10.28991/CEJ-2025-011-01-019 Full Text: PDF
ANALISIS MODEL 2 DIMENSI SUMUR RESAPAN SKALA KECIL LABORATORIUM DENGAN SOFTWARE GEOSTUDIO Setiawan, Bambang; Crismaningwang, Galuh; Purwana, Yusep Muslih; Fitri, Siti Nurlita; Indra, Raden Harya Danjanjaya Hesti
Jurnal Riset Rekayasa Sipil Vol 7, No 1 (2023): September 2023
Publisher : Prodi Teknik Sipil Fakultas Teknik Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jrrs.v7i1.67770

Abstract

Sumur resapan dapat memberikan solusi akan kekurangan ketersediaan air tanah, hal ini terjadi karena air yang sengaja dimasukkan ke dalam tanah memberikan imbuhan suplai air, sehingga ketersediaan air tanah dapat menjadi lebih besar, dan dapat dimanfaatkan oleh manusia untuk kebutuhan hidup sehari hari. Proses ini adalah dengan membuat wadah yang porus, baik secara vertikal maupun horisontal, sebagai intake atau jalan air masuk, yang kemudian diteruskan secara meresap melalui media yang dibuat yaitu berupa batu kerikil, pasir dan ijuk, dalam wadah sumur buis beton yang berlubang, secara alami proses meresap ke sisi bawah dan samping sumur resapan akan terjadi sesuai dengan kemampuan tanahnya yang dapat diukur melalui permeabilitasnya. Tanah porus dengan permeabilitas besar akan lebih mudah meresap dan mengalirkan air tersebut ke dalam tanah. Penelitian ini mengkaji dan menganalisis model sumur resapan 2 D (dimensi) skala kecil laboratorium dengan model software dan analisis empirisnya. Pengamatan dilakukan pada model uji fisik skala kecil laboratorium, yang mana perilaku dan proses resapan air akan terlihat secara jelas dan sebaran arah air meresap juga akan nampak, proses selanjutnya adalah menganalisis perilaku tersebut dengan software GeoStudio dan analisis model empiris yang berlaku. Hasil dari analisis ini akan dapat memprediksi dan mendisain tipe dan dimensi ukuran sumur resapan, yaitu nilai analisis rembesan air secara manual adalah berdekatan yaitu sebesar 0,132 cm/detik dan 0,1688 cm/detik untuk hasil dengan aplikasi/software, sehingga penggunaan software tersebut dapat digunakan sebagai prediksi rembesan air dalam tanah.
PERENCANAAN PONDASI GERBANG TOL KUTANEGARA PROYEK TOL JAKARTA-CIKAMPEK II BERDASARKAN DATA CONE PENETRATION TEST (CPT) Fitri, Siti Nurlita; Pradana, Erik Wahyu
Jurnal Riset Rekayasa Sipil Vol 6, No 2 (2023): Maret 2023
Publisher : Prodi Teknik Sipil Fakultas Teknik Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (470.917 KB) | DOI: 10.20961/jrrs.v6i2.68619

Abstract

The Jakarta Cikampek II Toll Road has several toll gates that require an analysis of the substructure against the load from the upper structure, one of them is the Kutanegara Toll Gate. The design of the substructure (foundation) is calculated based on upper loads and reactions from the superstructure. This study aims to analyze the bearing capacity of the deep foundation due to the reaction of the upper structure. As a result, this analysis ensures the safe condition of the infrastructure system. The method of this study use bearing capacity analysis based on the Cone Penetration Test (CPT) investigation with the Schmertmann and Nottingham Approach which is combined with the calculation of pile group efficiency using the Converse-Labarre formula. Based on the results of a soil investigation using CPT, the subgrade is clay soil at a depth of 0-10m with a qc value of 30-160 kN/m2 with a γ value of 18-20 kN/m3 and a cohesion of 50 kN/m2. The bearing capacity result at a depth of 10m reaches 428.71 kN. The pile configuration uses 2x2 piles with a diameter of 40cm and a pile cap size of 2m x 2m. The maximum Pu describes 193.6 kN, this value is still less than the bearing capacity of the pile which means the safety condition. This research is expected to be a reference for the analysis of the bearing capacity of the bottom structure for related toll gate designs.
Masonry Wall Performance Estimation Under Blast Loading: A Study Using Finite Element Analysis Fitri, Siti Nurlita; Mubarok, Muhammad Arif Husni; Hamadi, Halim; Do, Quang Thang; Pratama, Afiq Azfar; Rommy, Rommy
Mekanika: Majalah Ilmiah Mekanika Vol 24, No 1 (2025): MEKANIKA : Majalah Ilmiah Mekanika
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/mekanika.v24i1.97153

Abstract

This paper studies the dynamic response of masonry wall structures under blast loading. It requires a detailed understanding of the explosion phenomenon, wave propagation, and the structure's response to these shocks. The blast load is applied to the surface of the masonry wall. The main focus is to evaluate the dynamic response of a masonry wall due to a blast load. We used the Finite Element Method (FEM) for modeling the dynamic structural response to explosions. The explicit finite element modeling and analysis are done using ABAQUS CAE software. In this study, the model uses materials, namely Masonry. Masonry could be a composite structure entrenched by blocks of bricks articulated by mortar joints. In this study, the properties of the material used are clay bricks masonry as orthotropic materials. The structural analysis carried out in this study is related to stress, strain, and deformation due to the given loading.
Peningkatan Pengetahuan Masyarakat Tetang Mitigasi Bencana Gempa Bumi Di Desa Tohudan, Karanganyar Fitri, Siti Nurlita; Pradana, Erik Wahyu; Rifai, Muji; Septiariva, Iva Yenis
Matriks Teknik Sipil Vol 10, No 2 (2022): Juni
Publisher : Program Studi Teknik Sipil FT UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/mateksi.v10i2.55597

Abstract

Bencana gempa bumi merupakan salah satu hal penting yang harus diperhatikan pada beberapa kawasan di Jawa Tengah, tak terkecuali di Desa Tohudan, Karanganyar-Jawa Tengah. Banyak kerugian yang terjadi akibat dari bencana gempa bumi, untuk meminimalisir kerugian yang ditimbulkan dari bencan gempa bumi, maka hal yang harus dilakukan adalah melakuakan mitigasi bencana gempa bumi. Salah satu kegiatan yang dapat dilakukan adalah peningkatan pengetahuan masyarakat terhadap bahaya gempa bumi itu sendiri. Jurnal ini memuat kegiatan yang bertujuan untuk memberikan pengetahuan kepada masyarakat tentang gempa bumi. Kegiatan awal yang direncanakan adalah sosialisasi secara online, namun mengingat kasus positive Covid 19 yang belum reda, maka tim memutuskan untuk mengganti sistem dengan cara penempelan Poster dibeberapa lokasi di Desa Tohudan. Metode yang dilakukan pada kegiatan ini adalah persiapan media pembelajaran untuk peningkatan pengetahuan masyarakat, diskusi yang dilaksakana dengan perangkat desa, sosialisasi yang diganti dengan pembuatan desain poster, dan yang terakhir adalah penempelan poster. Kegiatan ini diharapkan dapat memberikan informasi kepada masyarakat terkait dengan mitigasi gempa bumi, sehingga kerugian yang terjadi akibat bencana dapat diminimalisir.
PENGARUH DIMENSI PONDASI DAN KAPASITAS MESIN TERHADAP RESPON STATIS PONDASI MESIN DANGKAL Arrasyidi, Addina Salam; Surjandari, Niken Silmi; Fitri, Siti Nurlita
Matriks Teknik Sipil Vol 10, No 3 (2022): September
Publisher : Program Studi Teknik Sipil FT UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/mateksi.v10i3.64113

Abstract

Pertumbuhan ekonomi dan penduduk di Indonesia mengakibatkan kebutuhan listrik yang meningkat. Salah satu cara mengatasi kebutuhan listrik yang terus meningkat adalah dengan membangun pembangkit listrik tenaga mikro hidro. Mesin PLTMH Ketika digunakan akan mengalami getaran yang dapat membahayakan mesin itu sendiri maupun lingkungan disekitarnya. Sehingga dibutuhkan pondasi mesin yang dapat meredam getaran mesin dan aman terhadap respon statis mesin PLTMH. Penelitian ini bertujuan untuk mengetahui bagaimana pengaruh dimensi pondasi dan kapasitas mesin terhadap respon statis pondasi mesin. Dengan variasi panjang dan lebar pondasi sebesar 0,5 m. Untuk variasi mesin yang digunakan adalah mesin dengan kapasitas 1000, 1500, dan 1200 rpm. Metode analisa yang digunakan adalah metode meyerhof. Hasil yang didapatkan dari penelitian ini adalah semakin besar panjang pondasi, maka akan terjadi penurunan daya dukung sebesar 6,67%, sedangkan semakin besar luas penampang pondasi maka akan terjadi penurunan tegangan statis sebesar 3% untuk semua mesin.
Co-Authors Aditya Rio Prabowo Arrasyidi, Addina Salam Bambang Setiawan Crismaningwang, Galuh Diputra, Marbono Widya Do, Quang Thang Halim Hamadi, Halim Indra, Raden Harya Danjanjaya Hesti Maulana, Sultan Mubarok, Muhammad Arif Husni Muji Rifai, Muji Muttaqie, Teguh Niken Silmi Surjandari Nurul Muhayat Pradana, Erik Wahyu Pratama, Afiq Azfar Rommy, Rommy Sawada, Kazuhide Septiariva, Iva Yenis Wibowo Wibowo Yusep Purwana Muslih