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All Journal Semesta Teknika Teras Jurnal Jurnal Riset Rekayasa Sipil
Juandra Hartono, Juandra
Universitas Gadjah Mada
Civil Engineering, Building, Construction & Architecture Engineering Environmental Science

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Perkuatan Lentur Pelat Lantai Tampang Persegi dengan Penambahan Tulangan Tarik dan Komposit Mortar Hartono, Juandra; Satyarno, Iman; Triwiyono, Andreas
Jurnal Semesta Teknika Vol 13, No 1 (2010): MEI 2010
Publisher : Jurnal Semesta Teknika

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Abstract

Overloading of structures can cause failure. In order to continue using them, strengthening is required. In this research elastic strengthening was carried out on concrete floor plates by means of tensile reinforcement addition, and mortar composite additionto apply epoxy resin. Four reinforced concrete slabs, consisted of one control slab (PK), one monolith slab (PM), one strengthened slab (PPE) and one unstrengthened slab (PPTE). Specimen dimensions were 700 mm x 1500 mm x 60 mm for the PK, and 700 mm x 1500 mm x 100 mm for the others. Specimens were placed on a simply supported loading frame, and statically loaded at their mid-span. Numerical analysis using Response-2000 software package was carried out for comparison with the experiment al result. It was found out that the flexural capacity of the PK, PPE, PPTE and PM specimens are 5,99 kNm, 12,52 kNm, 13,87 kNm and 21,38 kNm, respectively. In comparison with that of thePK, flexural capacity of the PPE and PPTE specimens was found to increase by 109,019 % and 131,55 %, respectively. The increase of stiffness was 324,77 % and 430,21 % for the PPE and PPTE specimens, respectively. The ductility factor of the PPE and PPTE increase 29,63 % and 19,03 %, respectively . The PK and PM specimen s experienced flexural failure, while the PPE and PPTE specimens experienced debondingfailure.
EVALUASI RENCANA PEMASANGAN SENSOR STRUCTURE HEALTH MONITORING SYSTEM JEMBATAN PULAU BALANG II Hartono, Juandra; Khoiroh, Umi
Teras Jurnal : Jurnal Teknik Sipil Vol. 11 No. 2 (2021): Volume 11 Nomor 2, September 2021
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v11i2.549

Abstract

Abstrak Salah satu isu utama dalam setiap penerapan Structure Health Monitoring System (SHMS) jembatan bentang panjang khususnya jembatan Pulau Balang II adalah bagaimana membuat SHMS tersebut dapat diandalkan secara efektif. Penggunaan sensor yang terlalu banyak tidaklah efisien demi mendapatkan informasi yang selengkap-lengkapnya terkait kondisi jembatan. Tujuan utama riset ini adalah untuk menganalisia tipe sensor, posisi penempatan sensor dan jumlah sensor yang akan dipasang pada SHMS jembatan Pulau Balang sesuai kebutuhan sensor yang efektif dan efisien. Pengamatan SHMS meliputi lendutan dek, pylon serta tegangan dek, pylon. Metode penelitian berupa pengamatan langsung di lapangan, analisa data dan diskusi dengan stakeholder jembatan. Dari hasil analisis terdapat 13 jenis sensor yang sebaiknya dipasang pada SHMS Jembatan Pulau Balang dengan total kebutuhan sensor berjumlah 87 buah. Posisi penempatan sensor sebagian besar ada di pylon, kabel dan dek yang disesuaikan dengan tipe jembatan yaitu cable stayed. Untuk sensor gempa disarankan perlu dipasang hal ini dikarenakan wilayah tersebut memiliki seismistis paling rendah yang didominasi oleh tiga zona sesar utama yaitu sesar mangkalihat, sesar tarakan dan sesar maratus oleh karena itu Kalimantan bukanlah daerah yang bebas gempa bumi. Kata kunci: structural health monitoring system (SHMS), sensor, pylon, dek, cable stayed  Abstract One of the main issues in each application of Structure Health Monitoring System (SHMS) in long span bridge particularly Pulau Balang II Bridge is how to make the SHMS effectively dependable. The excessive use of sensors is inefficient in order to obtain complete information regarding the condition of the bridge. The main purpose of this research is to analyze the type of sensor, the position of the sensor placement and the number of sensors that will be installed on the SHMS structure of the Balang Island bridge according to the need for effective and efficient sensors. SHMS observations include deck deflection, pylon and deck stress, pylon. The research method is in the form of direct observation in the field, data analysis and discussions with bridge stakeholders. From the results of the analysis, there are 13 types of sensors that should be installed on the Balang Island Bridge SHMS with a total sensor requirement of 87 units. Most of the sensor placement positions are in the pylons, cables and decks that are adapted to the type of bridge, namely cable stayed. For earthquake sensors, it is recommended to install this because the area has the lowest seismicity which is dominated by three main fault zones, namely the Mangkalihat Fault, Tarakan Fault and Maratus Fault. Therefore, Kalimantan is not an earthquake-free area Keywords: structural health monitoring system (SHMS), sensor, pylon, deck, cable stayed
Komparasi Kuat Tekan Beton Geopolimer Berbahan Dasar Fly Ash Dengan Metode Curing Oven dan Suhu Ruang Hartono, Juandra; H, Laely Laely Fitria; U, Adityo Budi; S, Hinawan Teguh
Teras Jurnal : Jurnal Teknik Sipil Vol. 12 No. 2 (2022): Volume 12 Nomor 2, September 2022
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v12i2.714

Abstract

Penelitian ini mengkaji beton geopolimer yang diproduksi menggunakan fly ash dan bersumber dari hasil pembakaran batubara PLTU Tanjung Jati, Kabupaten Jepara, Jawa Tengah, Indonesia. Fly Ash yang digunakan dikategorikan jenis F. Alkali aktivator berbentuk sodium hidroksida (NaOH) dan sodium silikat (Na‚‚SiO‚ƒ) dengan molaritas (10M). Riset ini bertujuan mengetahui perbandingan kuat tekan maksimum binder dan beton geopolimer diumur 28 hari melalui 2 metode perawatan, dibiarkan didalam suhu ruangan dan di oven pada temperatur 60°C selama 24 jam. Rangkaian pengujian yang dilakukan berupa uji material fly ash metode X-Ray Flourence (XRF), slump, kuat tekan binder dan beton geopolimer. Perbandingan aktivator yang digunakan pada pengujian binder dan beton geopolimer adalah 1:2 dan 1:3. Hasil riset menunjukkan nilai kuat tekan binder dan beton maksimum umur 28 hari sebesar 37,48 Mpa dan 60,09 Mpa terdapat pada variasi binder 10-3CR (curing oven) dengan rasio perbandingan NaOH terhadap Na‚‚SiO‚ƒ sebesar 1:3. Dari hasil analisa disimpulkan bahwa perawatan beton curing time 24 jam pada suhu 60°C memberikan kuat tekan maksimal dibandingkan dengan udara terbuka, hal ini disebabkan karena tipe material pembentuk fly ash proses hidrasinya sangat lambat, jika perawatan menggunakan oven maka proses hidrasi berlangsung lebih cepat sehingga tingkat kekerasan beton geopolimer akan lebih cepat pula. Disamping itu meningkatkan temperatur curing bisa mempercepat reaksi polimerisasi sehingga kuat tekan beton semakin meningkat akan tetapi pada suhu tertentu kuat tekan tersebut akan mengalami penurunan disebabkan sebagian air telah menguap sehingga kualitas beton geopolimer menjadi berkurang.Kata kunci: fly ash, geopolimer, sodium hidroksida, sodium silikat, curing time
ANALISIS PERBANDINGAN DAYA DUKUNG PONDASI TIANG PANCANG BERDASAR HASIL UJI SPT DAN PENGUJIAN DINAMIS Santoso, Hinawan Teguh; Hartono, Juandra
Jurnal Riset Rekayasa Sipil Vol 4, No 1 (2020): September 2020
Publisher : Prodi Teknik Sipil Fakultas Teknik Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (831.667 KB) | DOI: 10.20961/jrrs.v4i1.44635

Abstract

The foundation work is one of the main works in bridge construction. Failure of the foundation will be fatal for the entire bridge construction. Therefore, it is necessary to test the bearing capacity of the pile to determine the installed foundation capacity. The most accurate and most expensive method for determining the bearing capacity of a pile is a static load test, which is a full-scale trial method of giving a load 2 or 3 times greater than the designed load. Another method that is more economical and entirely accurate is using the High Strain Dynamics Pile Test (HSDPT) or often called the Pile Driving Analyzer (PDA) Test. This PDA test took a sample of 18 points of 600 mm diameter pre-stressed concrete piles on the Kaligawe Bridge located on Jalan Kaligawe KM 2+350, Semarang, Central Java. Based on the core drilling results, the soil layer was dominated by clay with an N-SPT value < 30 to a depth of 45 meters. The average bearing capacity of PDA test results is 432.4 tons or 0.4% greater when compared to the empirical approach based on N-SPT value (430.7 tons). The bearing capacity of the CAPWAP analysis is 401.0 tons or 7.3% less when compared to the PDA test, because the PDA test results are further processed using Signal Matching Analysis (SMA). CAPWAP analysis shows that the bearing capacity of piles is dominated by friction resistance by 71.7% and end resistance by 28.3% or by 4.4% difference when compared to the empirical approach, where the friction resistance value is 67.3% and end resistance is 32.7%. In general, it can be said that the PDA test is reliable enough to confirm the bearing capacity of the pile foundation that has been installed in the field.
Co-Authors Andreas Triwiyono H, Laely Laely Fitria Hidayatiningrum, Laely F. Iman Satyarno Masrianto -, Masrianto S, Hinawan Teguh Santoso, Hinawan Teguh U, Adityo Budi Umi Khoiroh, Umi Utomo, Adityo B.