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All Journal Natural B JGE (Jurnal Geofisika Eksplorasi) Momentum: Physics Education Journal Jurnal Infomanpro Journal of Infrastructure Planning and Engineering The Indonesian Journal of Computer Science
Ratri Andinisari
National Institute Of Technology, Malang, East Java, Indonesia
Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Physics Transportation

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Journal : Journal of Infrastructure Planning and Engineering

 1 
Review: land, cloud, and climate change (in focus: Borneo) Jason Pajimola Punay; Ratri Andinisari
Journal of Infrastructure Planning and Engineering (JIPE) Vol. 1 No. 1 (2022)
Publisher : Master Program of Infrastructure and Environmental Engineering, Postgraduate Program, Warmadewa University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (381.463 KB) | DOI: 10.22225/jipe.1.1.2022.33-37

Abstract

This article discusses the salient findings of the Intergovernmental Panel on Climate Change Special Report on Climate Change and Land (2019). Local impacts of global warming in Borneo are discussed in terms of changes in temperature and precipitation. A drier and warmer climate is expected with the continued deforestation of Borneo. Changes in land surface characteristics of Borneo also affect the properties of cloud that forms over it. Deforested areas are generally associated with diffused clouds, small cloud particles, and thin and high clouds. Low vegetative areas are associated with a low evapotranspiration rate and low amount of latent heat release, which discourages the formation of convective clouds. The weak updraft associated with a non-convective cloud cannot support the formation of large cloud droplets. Moreover, the deforestation of primary forests of Borneo and replacing them with palm trees may cause larger cloud properties’ variability over the area.
Vibration Modeling and Simulation of Braced and Unbraced Steel Structure Ratri Andinisari; Ester Priskasari; Vega Aditama; Bambang Wedyantaji; Rendy Adam Anggriawan
Journal of Infrastructure Planning and Engineering (JIPE) Vol. 2 No. 1 (2023)
Publisher : Master Program of Infrastructure and Environmental Engineering, Postgraduate Program, Warmadewa University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22225/jipe.2.1.2023.1-6

Abstract

Repeated dynamic loads on multiple stories structure may cause damage in the midst of natural disaster, such as earthquakes and landslides, hence it is necessary to observe how the response occurs. Therefore, this paper studies the performance of two-story steel frame without braces and with inverted V concentric braces. Both frames were given a static and a dynamic load in the form of a sinusoidal load for 2 seconds in the form of forced harmonic vibration. After the dynamic load is turned off, harmonic free vibration applies. Vibration is given to the weakest orthogonal axis on the frame with a frequency of 0,5 Hz; 1,03 Hz; 1.7 Hz. To reduce the deviation between stories that occur due to dynamic loads, bracing is provided as a stiffening element. The test variations are called models 1, 2 and 3 with model 1 unbraced frame and model 2 braced frame with the same load between floors, while model 3 unbraced frame model with weight 2nd floor is 3 times larger than 1st floor. It found that the braced frame has a minimum drift and its drift is enhanced with the increase of load capacity.
EFFECTS OF ALUMINUM FIBERS ADDITIVE ON THE COMPRESSIVE STRENGTH OF A CONCRETE Sudirman Indra; Nadya Rachma; Mohammad Erfan; Endro Yuwono; Ratri Andinisari
Journal of Infrastructure Planning and Engineering (JIPE) Vol. 3 No. 1 (2024)
Publisher : Master Program of Infrastructure and Environmental Engineering, Postgraduate Program, Warmadewa University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22225/jipe.3.1.2024.1-4

Abstract

Utilizing recycled waste as an additional construction material is an innovation that can reduce the negative environmental impacts caused by waste. One of the wastes that can be utilized in this case is aluminum cans. The use of aluminum fiber in concrete mixtures is appropriate since aluminum is resistant to corrosion or rust. This research aims to determine the effect of adding aluminum fiber on the compressive strength of concrete. The aluminum cans were shaved into fibers with dimensions of 2 x 35 mm. The resulting aluminum fiber is then added into the concrete mixture with a percentage of 0%, 0.05%, 0.075%, 0.1%, and 0.125% of the total volume of the test objects. Tests for compressive strength was then carried out after test specimens were aged for 28 days. The test results showed a peak compressive strength of (20.72 ± 0.35) MPa is observed at the addition of 0.05% aluminum fiber relative to the volume of concrete used for testing. A regression analysis was performed based on the relationship between the amount of aluminum fiber additive and the resulting compressive strength. Based on this analysis, the optimum value for aluminum fiber to be added to the concrete is 0.040% of its volume.
Co-Authors Ahmad Nadhir Akhmad Jufriadi Aminuddin, Jamrud Amir Yarkhasy Yuliardi Bambang Wedyantaji Endro Yuwono Ester Priskasari Fadhilah, Firda Haifa Hena Dian Ayu Hery Purwanto Jason Pajimola Punay Ketut Tomy Suhari Mohammad Erfan Nadya Rachma Rahmalia, Diah Ayu Rendy Adam Anggriawan Sudirman Indra Sukir Sukir Tampubolon, Danastri Lintang Pitaloka Vega Aditama