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All Journal Jurnal Teknik ITS IPTEK The Journal for Technology and Science Jurnal Aplikasi Teknik Sipil
Djoko Irawan
Departemen Teknik SIpil Institut Teknologi Sepuluh Nopember
Civil Engineering, Building, Construction & Architecture Computer Science & IT Engineering

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Journal : IPTEK The Journal for Technology and Science

 1 
Fluid-Soil-Structure Interaction Phenomena on Vibration Case at Pump Station Building Hendri Hermawan; Data Iranata; Djoko Irawan
IPTEK The Journal for Technology and Science Vol 30, No 3 (2019)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v30i3.5470

Abstract

Excitation at low-rise reinforced concrete building had occurred within the first-year post-construction phase. It is found that the structures laying on thick soil layer while performing up to 4 kPa water transport activity. Three approaches have been adopted to investigate the dynamic behavior and the interaction the phenomenon commonly called fluid-soil-structure interaction. Applying the finite element computation to represent the dynamic of the soil-fluid and structure, existing and ideal-fixed base condition are modeled and compared each. It was found that the structure’s modes frequencies, much depend on the rigidity of the base and the fluids traffic on the pump station. Time history string of displacements at the arbitrary point shows that the vibration does occurs and it tendentious increase by time
Investigation of Water Absorption for Concrete Using Supplementary Materials Gabriel Jose Posenti Ghewa; Priyo Suprobo; Djoko Irawan; Sutrisno Wahyuniarsih; Tambusay Asdam
IPTEK The Journal for Technology and Science Vol 31, No 3 (2020)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v31i3.5596

Abstract

Concrete’s durability is the key factor that affects the service life of the concrete structure. One factor that affects the durability properties of concrete is its pore structure, which can be investigated by analyzing the materials’ absorption rate. For the structures with direct contact with water, water absorption can change the pore structure’s behavior, affecting the durability of the conc in the long term rate. It is important to research to find the water absorption properties of concrete with different mixtures. This research investigates the rate of absorption of concrete by using fly ash and silica fume. Based on secondary absorption properties, the result shows that 15% fly ash in normal concrete increases the resistance to water penetration by 23%. The usage of 5% Silica Fume increases the resistance by 11.8%. The usage of 5% silica fume + 10% fly ash increases the resistance by 16.2%. It shows that the use of supplementary materials in concrete increases the resistance of water penetration. In this research, the usage of 15% fly ash as cement replacement shows the best result.
Co-Authors Alrasyid, Harun Asdam Tambusay Dody Burhanuddin Endah Wahyuni Farhan Natanagara Putra Setiawan Gabriel Jose Posenti Ghewa Hendri Hermawan Hidajat Sugihardjo Iranata, Data Muhammad Ali Rofiq Priyo Suprobo Wahyuniarsih Sutrisno