Article Per Year (5 Year)
p-Index From 2020 - 2025
1.683
P-Index
This Author published in this journals
All Journal REKA RACANA Jurnal Serambi Engineering
Desti Santi Pratiwi
Unknown Affiliation
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Engineering Environmental Science

Published : 10 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 10 Documents
Search

 1 
Analisis Potensi Likuefaksi dengan Berbagai Metode Berdasarkan Data Cone Penetration Test pada Jalan Tol Seksi II Probolinggo – Banyuwangi Ahmad Faris Aldzulfikar; Ikhya Ikhya; Desti Santi Pratiwi
RekaRacana: Jurnal Teknil Sipil Vol 7, No 3: November 2021
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaracana.v7i3.167

Abstract

ABSTRAKKerusakan infrastruktur yang terjadi di Indonesia bukan hanya diakibatkan oleh beban dinamis gempa, namun juga dipengaruhi oleh respon tanah di bawahnya ketika gempa terjadi, salah satu contohonya adalah fenomena likuefaksi. Proyek Pembangunan Jalan Tol Probolinggo – Banyuwangi, Jawa Timur berada pada zona kerentanan likuefaksi sedang dan berada dekat dengan sesar Probolinggo yang memiliki pegerakan 0,2mm per tahun dan memiliki besar magnitudo 6.5 Mw. Penelitian ini dimaksudkan untuk mengukur potensi likuefaksi yang mungkin terjadi pada proyek pembangunan tol Probolinggo – Banyuwangi dengan menggunakan data Cone Penetration Test (CPT) berdasarkan metode analisis Shibata & Terapaksa, Robertson & Wride, Youd & Idriss, Juang et. al dan Idriss & Boulanger untuk mencari nilai rasio tegangan siklik (CSR) dan rasio tahanan siklik (CRR). Data pendukung lainnya pada analisis potensi likuefaksi ini adalah peta bahaya gempa 2017 dengan klasifikasi situs tanah lunak dan sedang. Hasil penelitian menunjukan bahwa jenis tanah yang terlikuefaksi adalah tanah pasir dan lanau kepasiran, jenis tanah ini sangat berpengaruh terhadap nilai CRR, sedangkan nilai CSR dipengaruhi oleh percepatan puncak gempa dan klasifikasi situs tanah.Kata kunci: gempa, likuefaksi, metode analisis, CSR, CRR, CPT, percepatan puncak ABSTRACTInfrastructure damages that have been found in Indonesia were not only caused by dynamic loads of earthquake, but also by the soil response underneath it while an earthquake occurs and one of it being a phenomenon called liquefaction. The project of Probolinggo-Banyuwangi Toll Road in East Java is within a moderate zone of liquefable soil, located near Probolinggo fault which is moving 0.2mm every year, and a magnitude of 6.5 Mw. This research estimated the liquefaction potential of this project with the soil data obtained by Cone Penetration Test, analyzed by using the method of Shibata & Terapaksa, Robertson & Wride, Youd & Idriss, Juang et. al and Idriss Boulanger, calculating the Cyclic Stress Ratio and Cyclic Resistance Ratio. This analysis of the potential of liquefaction used the map of earthquake in 2017 applied to soft and medium soil class. This research shows that the type of soil liquefied is sand soil and sandy silt soil. Both of these types gave a significant influence in calculating the CRR value, while the CSR value in influenced by the maximum acceleration of earthquake and the soil classification.Keywords: earthquake, liquefaction, analysis method, CSR, CRR, CPT, maximum acceleration
Evaluasi Daya Dukung Pondasi Boredpile Menggunakan Metode Numerik 3 Dimensi dengan Hasil Uji di Lapangan Andika Gerry Habrianto; Desti Santi Pratiwi; Imam Aschuri
RekaRacana: Jurnal Teknil Sipil Vol 7, No 1: Maret 2021
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaracana.v7i1.246

Abstract

ABSTRAKPondasi tiang bor merupakan salah satu jenis pondasi dalam yang sudah sangat populer, terutama untuk pembangunan gedung-gedung megastruktur. Pada perencanaan suatu pondasi tiang sangat penting dilakukan analisis daya dukung dan penurunan untuk memastikan bahwa pondasi tersebut mampu menahan beban struktur di atasnya. Tujuan dari penelitian ini adalah menganalisis pondasi tiang bor menggunakan pemodelan numerik 3 dimensi dalam Program Plaxis. Pada pemodelan tiang bor digunakan model struktur Soil Cluster dan Embeded Beam, sedangkan pemodelan tanah menggunakan model tanah Hardening Soil (HS) dan Mohr Coulomb (MC). Hasil dari analisis numerik berupa nilai daya dukung dan penurunan ini akan dibandingkan dengan hasil pengujian PDA dan Beban Statik di lokasi pekerjaan Pembangunan Kantor PT. Daya Adicipta Mustika Bandung.Kata kunci: pondasi tiang, daya dukung, penurunan, model numerik, uji PDA ABSTRACTBored pile foundation is a popular deep foundation type, mainly for the construction of megastructural buildings. For designing a pile foundation, it is important to analyze the bearing capacity and settlement to ensure that the foundation is able to restrain the structure load. The objective of this paper is to analyze bored pile foundation using 3D numerical model in Plaxis software. In the bored pile modeling the Soil Cluster and Embeded Beam structural models are used, while the soil model uses Hardening Soil (HS) and Mohr Coulomb (MC). The numerical analysis results of bearing capacity and settlement will be compared with PDA and Static Loading test result at the PT. Daya Adicipta Mustika Bandung.Keywords: pile foundation, bearing capacity, settlement, numerical model, PDA test
Analisis Konstanta Pegas pada Fondasi Tiang (Studi Kasus: Gedung Type B DPRD Surabaya) Yuki Achmad Yakin; Desti Santi Pratiwi; Berry Fawaz Bilaldy
RekaRacana: Jurnal Teknil Sipil Vol 6, No 1: Maret 2020
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaracana.v6i1.42

Abstract

ABSTRAKKonstanta pegas tanah (k ) merupakan suatu hubungan konsep pengertian di antara tekanan tanah dan defleksi. Nilai konstanta pegas sudah banyak digunakan di dalam analisis konstruksi bagian-bagian fondasi. Nilai  dipakai untuk menghitung besarnya reaksi pada kepala tiang atau besarnya penurunan elastis pada pondasi. Konstanta pegas pada tanah terdiri dari dua arah, yaitu arah vertikal dan arah horizontal. Pada penelitian ini akan dilakukan analisis perhitungan nilai  pada lapisan tanah pasir dan lempung menggunakan Program Lpile dan Allpile. Perhitungan nilai k  untuk arah horizontal dilakukan menggunakan metode kurva p-y (Program Lpile) sedangkan untuk arah vertikal menggunakan metode kurva t-z  (Program Allpile). Nilai k  yang didapatkan dari kurva p-y dan kurva t-z akan dibandingkan dengan metode konvensional yang biasa digunakan. Hasil analisis menunjukkan bahwa nilai k  arah horizontal dengan metode p-y lebih besar dibandingkan dengan konvensional, sedangkan nilai k  arah vertikal hasil metode t-z  lebih kecil dibandingkan dari metode konvensional.Kata Kunci: konstanta pegas tanah, N-SPT, kurva , kurva , Allpile, Lpile ABSTRACTThe soil spring constant (k ) is a correlation concept between soil pressure and deflection. The value of spring constant has been widely used in the analysis of foundation parts. The value is used to calculate the magnitude of the reaction at the pile head or elastic settlement in the foundation. Soil spring constant consists of two directions, vertical direction and horizontal direction. This research will analyze the calculation of the  value on sand and clay sil layers using Lpile and Allpile Program. Calculation of the  value for the horizontal direction was used the p-y curve methode (Lpilee Program), while for the vertical direction used the t-z cuve method (Allpile). The k values obtained from the p-y curve and th t-z curve will be compared with convntional methiods. The analysis results show that the horizontal k value with the  p-y method is greater than the conventional method, while the value in the vertical direction from the t-z method is smaller than the conventional method.Key Words: soil spring constant, N-SPT,  p-y curve, t-z curve, Allpile, Lpile
Evaluasi Daya Dukung Pondasi Boredpile Menggunakan Metode Numerik 3 Dimensi dengan Hasil Uji di Lapangan Andika Gerry Habrianto; Desti Santi Pratiwi; Imam Aschuri
RekaRacana: Jurnal Teknil Sipil Vol 7, No 1: Maret 2021
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaracana.v7i1.32

Abstract

ABSTRAKPondasi tiang bor merupakan salah satu jenis pondasi dalam yang sudah sangat populer, terutama untuk pembangunan gedung-gedung megastruktur. Pada perencanaan suatu pondasi tiang sangat penting dilakukan analisis daya dukung dan penurunan untuk memastikan bahwa pondasi tersebut mampu menahan beban struktur di atasnya. Tujuan dari penelitian ini adalah menganalisis pondasi tiang bor menggunakan pemodelan numerik 3 dimensi dalam Program Plaxis. Pada pemodelan tiang bor digunakan model struktur Soil Cluster dan Embeded Beam, sedangkan pemodelan tanah menggunakan model tanah Hardening Soil (HS) dan Mohr Coulomb (MC). Hasil dari analisis numerik berupa nilai daya dukung dan penurunan ini akan dibandingkan dengan hasil pengujian PDA dan Beban Statik di lokasi pekerjaan Pembangunan Kantor PT. Daya Adicipta Mustika Bandung.Kata kunci: pondasi tiang, daya dukung, penurunan, model numerik, uji PDA ABSTRACTBored pile foundation is a popular deep foundation type, mainly for the construction of megastructural buildings. For designing a pile foundation, it is important to analyze the bearing capacity and settlement to ensure that the foundation is able to restrain the structure load. The objective of this paper is to analyze bored pile foundation using 3D numerical model in Plaxis software. In the bored pile modeling the Soil Cluster and Embeded Beam structural models are used, while the soil model uses Hardening Soil (HS) and Mohr Coulomb (MC). The numerical analysis results of bearing capacity and settlement will be compared with PDA and Static Loading test result at the PT. Daya Adicipta Mustika Bandung.Keywords: pile foundation, bearing capacity, settlement, numerical model, PDA test 
Perkuatan Fondasi pada Struktur Tower ATC di Kota Bandar Lampung Kamaludin Kamaludin; Desti Santi Pratiwi
RekaRacana: Jurnal Teknil Sipil Vol 8, No 2: Juli 2022
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaracana.v8i2.92

Abstract

ABSTRAKFondasi merupakan bagian struktur bawah yang harus memiliki kestabilan yang baik selain kesestabilan struktur atas. Salah satu fungsi fondasi berfungsi untuk menyalurkan beban layan dari struktur atas dan beban dari fondasi, kemudian diteruskan ke dalam tanah yang memilki daya dukung. Pada pembangunan tower ATC direncanakan kedalaman bored pile sejauh 10 m di bawah permukaan tanah, namun pada tahap pelaksanaan oleh kontraktor hanya dilaksanakan 6 m. Penelitian ini meninjau kembali daya dukung dan menentukan solusi perkuatan fondasi akibat perubahan kedalaman pada tahap pelaksanaan. Analisis dilakukan dengan cara melihat kembali gaya yang diterima oleh fondasi akibat beban layan struktur atas dan menghitung deformasi dengan menggunakan metode elemen hingga. Hasil analisis ini menunjukkan bahwa perubahan kedalaman yang dilaksanakan mengakibatkan terjadinya defleksi lateral maksimum sebesar 9,2-26,8 mm dan penurunan maksimum sebesar 42 mm. Perkuatan fondasi yang dapat dilakukan yaitu dengan cara penambahan sebanyak 2 bored pile untuk kelompok SW1, serta kelompok SW2 dan SW3 masing-masing sebanyak 1 bored pile. Berdasarkan hasil analisis terlihat bahwa dengan adanya penambahan perkuatan fondasi mampu mengurangi penurunan sebesar 22,9%-57,1% dan defleksi lateral sebesar 37,5%-42,9%.Kata kunci: bored pile, daya dukung, defleksi lateral, metode elemen hingga, perkuatan fondasi ABSTRACTThe foundation is part of the lower structure that must have good stability besides the upper structure. One of the foundation’s functions is transmitting the service load from the superstructure and the load from this foundation into the supporting soil below it. In the construction of the ATC tower, it is planned that the depth of bored pile is 10 m, but at the implementation stage is only carried out as deep as 6 m. This study reviews the bearing capacity as a result of changes in depth applied by the contractor, and determines the solution for the underlying retrofit solution due to implementation changes. The analysis is carried out by reviewing received forces originating from the superstructure and deflection’s magnitude using finite element method. The analysis results show that the maximum lateral deflection is 92.2-26.8 mm and settlement is 42 mm not only occurs due to depth changes but also exceeds the allowable deflection. The solution to reinforce the foundation is adding 2 points to the pile group SW1 and 1 point to the pile group SW2 and SW3. Based on the analysis result of the addition of foundation reinforcement can decrease settlement by 22.9%-57.1% and lateral deflection by 37.5%-42.9%.Keywords: bored pile, bearing capacity, lateral deflection, finite element method, foundation reinforcement 
Evaluasi Tanah Pasir Lepas Terhadap Potensi Likuefaksi di Area Bandara Kulon Progo Berdasarkan Peta Gempa Indonesia tahun 2017 Yuki Achmad Yakin; Desti Santi Pratiwi; Virhan Maulana Fachrezy
Jurnal Serambi Engineering Vol 8, No 2 (2023): April 2023
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v8i2.6008

Abstract

Java Island is traversed by the Pacific Ring of Fire, making Java Island an earthquake-prone area. One of the problems caused by earthquake is the danger of liquefaction. Kulon Progo is in a zone of high liquefaction vulnerability. Liquefaction is the loss of soil shear strength due to changes in soil properties from solid to liquid caused by cyclic loads that occur so that the pore water pressure increases beyond the vertical stress and causes the effective stress to be zero. Liquefaction mostly occurred in sand loose and saturated condition. Peak Ground Acceleration values (PGA) and earthquake magnitude are sourced from Peta Gempa Indonesia 2017 and use soil data from the Standard Penetration Test (SPT) test results. In evaluating the potential for liquefaction at the study site, the analysis method Youd Idriss, Idriss Boulanger, and Tokimatsu Yoshimi was used. The results of the comparison between soil resistance or Cyclic Resistance Ratio (CRR) with cyclic loads that occur or Cyclic Stress Ratio (CSR) show the same results. In part 1 it can be seen that the average depth of liquefied soil starts from a depth of 1.7 – 4 meters or as deep as 2.3 m, while in part 2 it can be seen that the average depth of liquefied soil starts from a depth of 3.3 – 4 meters or as deep as 0.7m.
Pengaruh Magnitude Moment Terhadap Potensi Likuefaksi Tanah Loose Sand Jenuh Air Menggunakan Model UBC3D-PLM Yuki Achmad Yakin; Desti Santi Pratiwi; Farhan Tri Jaelani
Jurnal Serambi Engineering Vol 8, No 2 (2023): April 2023
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v8i2.6009

Abstract

Liquefaction is a decrease in the shear strength of the soil caused by an increase in pore water pressure until it is equal to the strength value of the soil. The Plaxis 2D application with the UBC3D-PLM model is used in this study to analyze the effect of the magnitude moment on soils with liquefaction potential, the effect of the magnitude moment on the increase in pore water pressure ratio, the effect of different soil densities, and the effect of the depth of loose soil on the potential for liquefaction. The effect of moment magnitude on liquefaction potential is obtained from the results of data modeling analysis. The analysis results show that the potential for liquefaction increases with the magnitude of the moment. On the other hand, the liquefaction probability is lower when the moment magnitude is smaller. This study shows that an earthquake with a magnitude of 6.95 (Mw) occurs in loose and medium-dense soils. Meanwhile, an earthquake with a moment magnitude of 5.5 (Mw) only occurs on soils with loose density. Meanwhile, the earthquake with a moment magnitude of 4.27 (Mw) did not experience liquefaction at any soil density.
Pengaruh Spasi antar Helix terhadap Daya Dukung Fondasi Helical Pile pada Tanah Limestone dengan Metode Hoek Brown dan Mohr Coloumb Yuki Achmad Yakin; Desti Santi Pratiwi; Yanuar Agis Sugiarto
RekaRacana: Jurnal Teknil Sipil Vol 9, No 2: Juli 2023
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaracana.v9i2.26

Abstract

ABSTRAKRencana pembangunan pembangkit listrik tenaga surya di bali. Karena pembangunan berada di lokasi bukit tinggi dekat laut yang dimana memiliki hembusan angin yang cukup kuat sehingga memengaruhi kuat aksial tekan dan aksial tarik. Oleh karena itu alternatif untuk menahan beban tekan dan tarik yaitu menggunakan fondasi Helical pile dimana lokasi penempatanya di bebatuan tanah Limestone. Dalam pemodelan fondasi helical pile divariasikan spasi helix nya yaitu 0,1 m; 0,15; m 0,2 m; dan 0,3 m. Hasil Deformasi dipemodelan plaxis 3D ada yaitu daya dukung ultimate dengan perbandingan model tanah Hoek Brown dan Mohr Coloumb dimana nilai daya dukung nya berbeda karena parameter dan spasi helix mempengaruhi nilai daya dukung. Untuk perhitungan analitis daya dukung menggunakan 2 metode yaitu Individual Bearing dan Cylindrical Shear. Tahapan perhitungan 2 metode memiliki nilai daya dukung yang berbeda berdasarkan nilai variasi spasi antar helix.Kata kunci: helical pile, Plaxis 3D, Hoek Brown, Mohr Coloumb ABSTRACTPlans to build a solar power plant in Bali. Because the development is located on a high hill near the sea which has strong enough wind gusts that affect axial compressive and axial tensile strength. Therefore an alternative to withstand compressive and tensile loads is to use a Helical pile foundation where the location is placed in Limestone soil rocks. In modeling the helical pile foundation, the helix spacing varies, namely 0.1 m 0.15 m 0.2 m and 0.3 m. The results of deformation in 3D plaxis modeling are the ultimate bearing capacity with a comparison of the Hoek Brown and Mohr Coloumb soil models where the bearing capacity values are different because the parameters and helix spacing affect the bearing capacity values. For the analytical calculation of the carrying capacity using 2 methods, namely Individual Bearing and Cylindrical Shear. The calculation stages of the 2 methods have different carrying capacity values based on the variation in the spacing between helix.Keywords: helical pile, Plaxis 3D, Hoek Brown, Mohr Coloumb
Evaluasi Tanah Pasir Lepas Terhadap Potensi Likuefaksi di Area Bandara Kulon Progo Berdasarkan Peta Gempa Indonesia tahun 2017 Yuki Achmad Yakin; Desti Santi Pratiwi; Virhan Maulana Fachrezy
Jurnal Serambi Engineering Vol 8, No 2 (2023): April 2023
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v8i2.6008

Abstract

Java Island is traversed by the Pacific Ring of Fire, making Java Island an earthquake-prone area. One of the problems caused by earthquake is the danger of liquefaction. Kulon Progo is in a zone of high liquefaction vulnerability. Liquefaction is the loss of soil shear strength due to changes in soil properties from solid to liquid caused by cyclic loads that occur so that the pore water pressure increases beyond the vertical stress and causes the effective stress to be zero. Liquefaction mostly occurred in sand loose and saturated condition. Peak Ground Acceleration values (PGA) and earthquake magnitude are sourced from Peta Gempa Indonesia 2017 and use soil data from the Standard Penetration Test (SPT) test results. In evaluating the potential for liquefaction at the study site, the analysis method Youd Idriss, Idriss Boulanger, and Tokimatsu Yoshimi was used. The results of the comparison between soil resistance or Cyclic Resistance Ratio (CRR) with cyclic loads that occur or Cyclic Stress Ratio (CSR) show the same results. In part 1 it can be seen that the average depth of liquefied soil starts from a depth of 1.7 – 4 meters or as deep as 2.3 m, while in part 2 it can be seen that the average depth of liquefied soil starts from a depth of 3.3 – 4 meters or as deep as 0.7m.
Pengaruh Magnitude Moment Terhadap Potensi Likuefaksi Tanah Loose Sand Jenuh Air Menggunakan Model UBC3D-PLM Yuki Achmad Yakin; Desti Santi Pratiwi; Farhan Tri Jaelani
Jurnal Serambi Engineering Vol 8, No 2 (2023): April 2023
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v8i2.6009

Abstract

Liquefaction is a decrease in the shear strength of the soil caused by an increase in pore water pressure until it is equal to the strength value of the soil. The Plaxis 2D application with the UBC3D-PLM model is used in this study to analyze the effect of the magnitude moment on soils with liquefaction potential, the effect of the magnitude moment on the increase in pore water pressure ratio, the effect of different soil densities, and the effect of the depth of loose soil on the potential for liquefaction. The effect of moment magnitude on liquefaction potential is obtained from the results of data modeling analysis. The analysis results show that the potential for liquefaction increases with the magnitude of the moment. On the other hand, the liquefaction probability is lower when the moment magnitude is smaller. This study shows that an earthquake with a magnitude of 6.95 (Mw) occurs in loose and medium-dense soils. Meanwhile, an earthquake with a moment magnitude of 5.5 (Mw) only occurs on soils with loose density. Meanwhile, the earthquake with a moment magnitude of 4.27 (Mw) did not experience liquefaction at any soil density.
Co-Authors Ahmad Faris Aldzulfikar Andika Gerry Habrianto Berry Fawaz Bilaldy Farhan Tri Jaelani Ikhya Ikhya Imam Aschuri Kamaludin Kamaludin Virhan Maulana Fachrezy Yanuar Agis Sugiarto Yuki Achmad Yakin Yuki Achmad Yakin