Pramudiyanto Pramudiyanto
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Journal : Inersia : Jurnal Teknik Sipil dan Arsitektur

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1263.72 KB) | DOI: 10.21831/inersia.v2i2.8314

Abstract

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7321.687 KB) | DOI: 10.21831/inersia.v7i2.3688

Abstract

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (299.919 KB) | DOI: 10.21831/inersia.v12i2.12588

Abstract

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