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All Journal Potensi : Jurnal Sipil Politeknik Jurnal Basement : Jurnal Teknik Sipil
Agastyasa Ghea Amarta
Jakarta Global University
Civil Engineering, Building, Construction & Architecture Engineering Transportation

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Influence of Scouring Phenomenon on Slope Stability in Substructure Construction of Cipeles Bridge Riskia Jordy; Dewi Amalia; Agastyasa Ghea Amarta
Potensi: Jurnal Sipil Politeknik Vol. 26 No. 1 (2024): Potensi: Jurnal Sipil Politeknik
Publisher : Department of Civil Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/potensi.v26i1.5848

Abstract

Slope stability represents a crucial aspect of terrain integrity, safeguarding against potential landslides and ensuring structural resilience. Instabilities arise primarily from diminished safety margins and landslide occurrences triggered by alterations in slope dimensions or geometry induced by river water scouring. Such scouring processes engender heightened slope steepness, exacerbating vulnerability to failure. Utilizing Finite Element Method (FEM) software, specifically Plaxis 2D Version 22, back calculation analysis, or reverse analysis, offers a robust approach to assess safety factors and collapse patterns resulting from scour-induced alterations. Our investigation reveals a pronounced expansion of slope failure zones attributable to scour phenomena, encompassing both primary and secondary scour instances. Concurrently, there is a discernible reduction in Safety Factor (SF) values and y-displacement magnitudes along the slope, with the most notable declines observed under condition 3 (displacement-y value reaches 79,53 mm). These alterations stem from geometric transformations within the slope, culminating in increased steepness and corresponding destabilization.
Increased Durability of Concrete Against High Temperatures due to Fire using Vermiculite and Polypropylene Additives Lintang Dian Artanti; Aulia Choiri Windari; Agastyasa Ghea Amarta
Potensi: Jurnal Sipil Politeknik Vol. 26 No. 2 (2024): Potensi: Jurnal Sipil Politeknik
Publisher : Department of Civil Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/potensi.v26i2.6429

Abstract

As a primary material in infrastructure construction, concrete must endure diverse environmental conditions and weather, including maintaining its strength when subjected to high temperatures, especially during fire-related disasters. To address this challenge, additional materials are required in the concrete mixture to enhance its resistance to high temperatures. In this study, vermiculite and polypropylene were chosen as the additives. Vermiculite was added to the concrete mix at a proportion of 36%, and polypropylene at 1%. A fire simulation was conducted by placing 28-day-old concrete specimens in a flame for 1 hour, 2 hours, and 4 hours. After the fire simulation, the results showed that concrete with the addition of vermiculite and polypropylene experienced a strength reduction of 25.76% (1 hour), 45.02% (2 hours), and 66.29% (4 hours), whereas the control concrete exhibited strength reductions of 29.43% (1 hour), 41.02% (2 hours), and 68.63% (4 hours). Therefore, it can be concluded that concrete with 36% vermiculite and 1% polypropylene is effective in maintaining 2.34% more strength. This improvement is attributed to the fact that the concrete with vermiculite and polypropylene has more voids, which effectively facilitate the circulation of trapped heat within the concrete, thereby slightly reducing the extent of damage
Evaluasi Kinerja Kapasitas Struktur Eksisting Terhadap Simulasi Penambahan Tingkat Berdasarkan SNI 1726:2019 (Studi Kasus: Gedung Rumah Susun Negara Kementerian Keuangan, Jakarta Barat) Rizci Purna Dewanti; Dedy Rutama; Agastyasa Ghea Amarta
Jurnal Basement : Jurnal Teknik Sipil Vol. 4 No. 2 (2026): Jurnal Basement : Jurnal Teknik Sipil
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/basement.v4i2.27216

Abstract

The increasing demand for vertical housing in urban areas has encouraged the optimization of existing buildings to expand residential capacity without additional land development. The State Apartment Building of the Ministry of Finance in West Jakarta was originally designed as a two-tower complex; however, only one 12-story tower was constructed, prompting an evaluation of its feasibility for expansion to 25 stories. This study evaluates the structural capacity of the existing building as a basis for determining the need for redesign or structural strengthening. Structural analysis was performed using ETABS v22.7 and the response spectrum method in accordance with SNI 1726:2019 and SNI 2847:2019. The existing 12-story structure was evaluated through 15, 18, 21, and 24-story simulations while maintaining the original member dimensions. The evaluation covered modal mass participation, natural period, base shear scaling, dual system performance, inter-story drift, torsional irregularity, and member capacity ratios. The results show that the existing structure satisfies all performance requirements under the 12-story condition. However, overstressed members appear in the 15-story model and increase significantly in the 18, 21, and 24-story models due to higher internal forces and seismic response.
Co-Authors Aulia Choiri Windari Dedy Rutama Dewi Amalia Lintang Dian Artanti Riskia Jordy Rizci Purna Dewanti