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Model Matematik Aliran Air Bawah Bendung Pramudiyanto, Didik Purwantoro
Inersia : Jurnal Teknik Sipil dan Arsitektur Vol 3, No 2 (2007): Agustus
Publisher : Universitas Negeri Yogyakarta

Dam is a structure which is the main function is to dammed up theflow ofthe river so that it gets the sum ofa specific volume ofthe water. The dam can be builtfrom concrete, stone, sand,. clay or combinations between them. As it function to resist the water flow ofthe river, the dam must be controlledfrom its displacement or turning over came fromthe water pressure. On the clay-typed dam, the safety value is also determinedfrom the water "rembesan ". As its affected to the stability of the dam, "rembesan" can caused the leak ofthe water to the dam and then become ruin. To anticipate those phenomenon of "rembesan" need a ''pengamatan cermat" to the "rembesan" activity of the dam so the development of "rembesan " activity can be detected, find the problem and then appropriate actions can be taken to solve them, and then more bigger problem can be avoided. The next important aspects are the dam s "rembesan" and "bocoran". On a specific circumstances, beside the "rembesan" and "bocoran" which can caused loosing the water, the "bocoran" can broke down the stability ofthe surrouding structure nearthe dam. The underground "rembesan" on a dam can be determined through numerical model with the finite element method. The utilization ofthe finite element method on the case ofthe dam "rembesan" seem like a new method compared with the finite difference method.

PENGARUH PENAMBAHAN ABU VULKANIK GUNUNG KELUD TERHADAP KUAT TEKAN BETON Sadham Panjang Yuswanto, Pramudiyanto
Inersia : Jurnal Teknik Sipil dan Arsitektur Vol 11, No 1 (2015): Mei
Publisher : Universitas Negeri Yogyakarta

ABSTRACTThis study aims to determine the chemical content Volcanic Ash Kelud and determinethe effect of volcanic ash that has burned at a temperature of 600ºC for concrete compressivestrength. Testing will be done on the physical properties and chemical composition of theVolcanic Ash content Kelud using Atomic Absorption Spectrometry (AAS) and Gravimetryinclude the content of Al2O3, Fe2O3, SiO2, H2O and LO1. This test refers to ASTM 618-03 andSNI 15-0302-2004. Further testing concrete compressive strength with three cylindrical concretespecimen with a diameter of 15 cm and a height of 30 cm to 28 days on each variant. Theaddition of volcanic ash Kelud varied with dose of 0%, 5%, 10%, 15% and 20% of the weight ofcement needed. Data were analyzed with descriptive-quantitative method to determine thefeasibility of volcanic ash in concrete production based on the requirements of new chemicalelements Pozolan nature. The results showed that of the test sample composition chemicalconstituents Volcanic Ash Kelud from Pringwulung village, Depok, Sleman qualify as naturalPozolan. The greater the increase percentage of volcanic ash on the weight of the cement, thecompressive strength of concrete produced increasingly large, the compressive strength ofconcrete against any variation on the addition of volcanic ash Kelud 0%, 5%, 10%, 15% and20% obtained compressive strength average amounted to 34.295 Mpa, 36.731 MPa, 41.881MPa, 42.767 MPa and 46.947 MPa. Where the maximum compressive strength of the concreteobtained with the addition of volcanic ash of 20% and a minimum compressive strength of theconcrete obtained with the addition of volcanic ash at 0% (No Addition).Keywords: Chemical Ingredients, Concrete Compressive Strength, Volcanic Ash Kelud

UJI KINERJA MARSHALL AGREGAT BANTAK MERAPI DENGAN MENGGUNAKAN SERAT POLYPROPYLENE Faqih Ma’arif, Pramudiyanto
Inersia : Jurnal Teknik Sipil dan Arsitektur Vol 10, No 1 (2014): Mei
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v10i1.4424

This research aim to describe of polypropylene and characteristic Optimum Marshall using Bantak Merapi as agregate in the proportion mix. The method used experimental laboratory. The research consist of four varians, that are A (0% PF); B (0,1% PF); C (0,3% PF); and D (0,5% PF), with PF is Polypropylene fibers. The kind of testing are Stability test; penetration test; softening point; flash point and dencity test. Data analysis used descriptive quantitative. Test result showed that the optimum polypropylene fibers is 0,3%; the amount of density; void in mix (VIM); stability; and flow were the result 2,16gr/cm3; 10,85%; 819,03kg; and 2,23mm.Key words: Polypropyelene fibers, Bantak

RANCANG BANGUN SISTEM ANTARMUKA OTOMATISASI MODEL BENDUNG GERAK Didik Purwantoro, Pramudiyanto
Inersia : Jurnal Teknik Sipil dan Arsitektur Vol 7, No 1 (2011): Mei
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v7i1.3705

The dam is always identified as the shelter of water (water storage) which is used to satisfy the needs of human life. However, the dam holds in its development can also be used for agricultural irrigation systems in line with the development of agriculture. Up to this point, the dam holds still utilized in accordance with the basic concept that for the purposes of everyday, the need for agriculture (irrigation), energy (electricity), flood control, and so on. Then for ease in learning and understanding the characteristics of a dam holds then created a model that approximates the actual dam holds that aims to be able to better understand the symptoms that occur at a dam holds. The purpose of this research is to be able to create a system interface and information systems that can support a model dam holds motion. The resulting Model can then be used as a medium of learning technology application in the dam Hydraulics courses.Design of a system of an interface automation a model of weir motion it consists of design of hardware and software. Hardware design includes a series of sensors and driver circuit motor SRF02 stepper. Data obtained in this study was analyzed using the Chauvenette Criterion Method. This method of data are invalidate and tends to produce outlayer interpretation is not good. The test results showed that the value of the resulting data transducer SRF02, the equation of y = -0.698x + 8.2062 with coefficients of correlation value 0.9705. This shows that the transducer used to have a good liniear equation of high water on the overflow that is measurable.The test showed that the stepper motor has been able to move in accordance with orders. From the test results can be seen that the software has been created can be run and hardware are made to work according to have commands that are present in the software. So it can be inferred that the system that has been created can work well.

STUDI TEGANGAN-REGANGAN SALOK ( Tinjauan Terhadap Konstruksi Ramp Stadion Maguwoharjo, Sleman ) Pramudiyanto Pramudiyanto
Inersia : Jurnal Teknik Sipil dan Arsitektur Vol 2, No 2 (2006): September
Publisher : Universitas Negeri Yogyakarta

AbstractThis research aims to gather information of computer application ofstructural mechanics to determine the distribution of stress and strain ofthe cross section. The research focuses on the actors of computer users,the data analyzing, and stress-strain behavior.This research applies experimental approach. The chosensubject is the ramp construction of The Maguwoharjo Soccer Stadium,Sleman. The construction is being chosen with the reason of a uniqueconstruction.The ramp then being analyzed mathematically usingVisualFEA to determined the stress-strain behavior.The research result show that the use of specific computerprograms, and for the specific case given, the distribution of stress andstrain still linear. The analysis show that the distribution of stress stillfollow the linearity, even the analysis method using the different way.Keywords: computer user, structural mechanics, stress-strain.

PENGARUH TEBAL SELIMUT BETON NORMAL PADA LAJU KOROSI BAJA TULANGAN Pramudiyanto Pramudiyanto; A. Triwiyono A. Triwiyono; HRC Priyosulistyo
Inersia : Jurnal Teknik Sipil dan Arsitektur Vol 7, No 2 (2011): Desember
Publisher : Universitas Negeri Yogyakarta

Corrosion of steel reinforcement is the main cause of deterioration andpreliminary failure of reinforced concrete construction. The effect is the large amountof funding to repair, restore and replace the broken part. The aim of this research isto figure out the corrosion process on the reinforcement of concrete construction withlocal aggregate in the salt water environment. The specific aim is to find out thecorrosion rate of steel reinforcement having concrete compression strength between25 MPa to 30 MPa.The DC Electrochemical Test Method with impressed current technique was used inthis research. The test is using cylinder with various diameter. The reinforcementsteel is placed in the center of cylinder cross section to make a condition of differentcover thickness. The test was conducted 45 days non-stop, observing specimen’spotential change and crack pattern. The corrosion rate and corrosion current density(Icorr) were compute using weight loss of steel. The carbonation test using bufferphenolphthalein was also conducted in this research.The result shows that there’re a downstream trend of corrosion rate and corrosioncurrent density to the concrete cover’s thickness. The corrosion rate of ∅1.25”, ∅3”,∅5” and ∅6” specimens as follow: 4.440981 mm/yr, 1.63395 mm/yr, 0.026253mm/yr and 0.00 mm/yr. The corrosion current density (Icorr) of ∅1.25”, ∅3”, ∅5” and∅6” specimens as follow: 0.000382446 mA/cm2, 0.000141 mA/cm2, 2.2x10-6 mA/cm2and 0.00 mA/cm2.The potential change’s profile will goes down according to the timeof test. The graph of potential change to the time forming a curved line until a timewhen the line becomes straight. The crack pattern started from the region betweenthe submerge and the dry region, then move to the entire part of specimen. Thecarbonation was dominated by corroded specimen.Keyword: corrosion of concrete reinforcement, concrete cover thickness,carbonation, impressed current technique

Uji Durabilitas Bahan pada Elemen Balok Beton Bertulang Akibat Beban Statik di Lingkungan yang Merusak Pramudiyanto Pramudiyanto; Abdul Manap; Pusoko Prapto
Inersia : Jurnal Teknik Sipil dan Arsitektur Vol 12, No 2 (2016): Desember
Publisher : Universitas Negeri Yogyakarta

ABSTRACTConcrete structures reinforced with steel formed an important part of recent infrastructure. The combination of high strength properties on concrete and high tensile on steel provide an ideal composite material that offered wide application compare with other material on structural engineering. Buildings, bridges, piers, tanks and pipe, can be made from reinforced concrete. The aim of this research is to discover the durability of reinforced concrete beam on severe environment. This research conducted based on ASTM G-109 and Florida Test of Method FM 5-222. The method used on this research is DC Electrochemical Method with impressed current technique. The test conducted 120 days to gain beam flexural strength. The results show (1) there are two conditions on the beam, i.e.: (a) the beam is put based on compressive strength, and (b) the beam is put based on different salt content, (2) both conditions doesn’t give much effect on beam flexural strength, (3) the beam increased as the time goes by and the increasing compressive strength, (4) the not-affected beam is suspected because un-perfect conditioning process, (5) the forced-corrosion process is not run well because the solution can’t seep into the beam, (6) the gained flexural strength parameter is not depicted the condition of reinforced concrete on severe environment.Keywords: concrete beam, durability, severe environmentABSTRAK Struktur beton yang diperkuat dengan tulangan baja membentuk sebuah bagian yang penting dalam infrastruktur saat ini. Kombinasi sifat kuat tekan yang tinggi pada beton dan kuat tarik pada tulangan baja memberikan sebuah bahan komposit ideal yang menawarkan aplikasi yang lebih luas cakupannya dibandingkan dengan bahan-bahan lain pada bidang teknologi struktur sipil. Gedung-gedung, jembatan, tiang-tiang, tangki dan pipa, dapat dibuat dari bahan beton bertulang. Tujuan penelitian ini adalah untuk mengetahui durabilitas elemen struktur balok beton bertulang yang berada di lingkungan yang merusak. Penelitian ini dilaksanakan mengacu pada standar ASTM G-109 dan Florida Test of Method FM 5-522. Metode yang digunakan pada penelitian ini adalah DC Electrochemical Method dengan teknik arus paksa (impressed current). Pengujian dilaksanakan selama 120 hari, dengan data yang diambil adalah kuat lentur balok. Berdasarkan hasil penelitian tersebut dapat disimpulkan bahwa: (1) Terdapat dua pengkondisian uji terhadap balok beton bertulang, yakni (a) balok beton dikondisikan terhadap beda kuat desak, dan (b) balok beton dikondisikan dengan beda kadar garam air rendaman, (2) Dari kedua kondisi yang diberikan, perlakuan kondisi (a) maupun kondisi (b) tidak memberikan pengaruh terhadap kuat lentur balok beton, (3) Balok beton masih memberikan nilai kuat lentur yang meningkat sejalan dengan berjalannya waktu dan dengan kenaikan kuat desaknya, (4) Tidak terpengaruhnya balok beton pada kedua kondisi yang diberikan diduga disebabkan karena proses pengkondisian yang tidak terjadi dengan sempurna, sehingga proses yang diharapkan terjadi tidak berjalan sebagaimana mestinya, (5) Proses korosi paksa tidak dapat berjalan dengan baik karena larutan penghantar tidak dapat masuk/merambat ke dalam beton, (6) Parameter kuat lentur yang diperoleh belum mencerminkan kondisi struktur beton yang berada di lingkungan yang merusak.Kata kunci: balok beton, durabilitas, lingkungan yang merusak

Pelatihan building information modeling bagi Guru Sekolah Menengah Kejuruan di DIY dan Jawa Tengah Hastutiningsih, Arum Dwi; Pramudiyanto, Pramudiyanto; Elviana, Elviana; Raharjo, Nuryadin Eko
Penamas: Journal of Community Service Vol. 4 No. 2 (2024): Penamas: Journal of Community Service
Publisher : Nur Science Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53088/penamas.v4i2.1288

This community service aims to enhance the digital competence of Vocational High School (SMK) teachers in the Special Region of Yogyakarta (DIY) and Central Java through Building Information Modeling (BIM) training. BIM is a crucial technology in the digital era, especially in the construction, architecture, and civil engineering sectors, as it facilitates better collaboration in project planning, design, and management. Through this training, teachers are expected to integrate BIM technology into the learning process to help students understand practical concepts relevant to the workforce. The results of this activity show an increase in teachers' competency in using BIM, as well as their readiness to apply technology-based learning methods in the classroom.

Development of VR Learning Media in Vocational Schools as a Form of Technology Integration Hastutiningsih, Arum Dwi; Elviana; Eko, Nuryadin; Pramudiyanto
Jurnal Pendidikan Vokasi Raflesia Vol 4 No 2 (2024): Jurnal Pendidikan Vokasi Raflesia
Publisher : LPPM Politeknik Raflesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53494/jpvr.v4i2.449

Research and Development (R&D) Borg Gall approach to develop VR learning media that aligns with the curriculum and the needs of vocational school students. Through R&D stages such as needs analysis, design, development, and evaluation, VR content is designed to provide deep and relevant learning experiences related to the workplace. Adequate technological infrastructure is also considered to support VR implementation in the vocational school learning environment. Furthermore, teacher training is conducted to ensure effective VR utilization in the learning process. Continuous evaluation is carried out to measure the effectiveness and feasibility of VR learning media usage in vocational school. This research aims to provide practical guidelines for the development and implementation of VR-based learning media in vocational school, focusing on student engagement and improving learning quality.

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