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All Journal Potensi : Jurnal Sipil Politeknik Jurnal Ilmiah Teknik Sipil Open Access DRIVERset
Bayu Wintoro
Politeknik Negeri Bandung
Civil Engineering, Building, Construction & Architecture Engineering Transportation

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PIER PERFORMANCE LEVEL OF JAKARTA-BANDUNG HIGH SPEED RAILWAY WITH ISOLATOR UNDER EARTHQUAKE LOADS USING TIME HISTORY ANALYSIS Amirah Zakiyyah; Aris Aryanto; Bayu Wintoro
Jurnal Ilmiah Teknik Sipil Vol. 28 No. 2 (2024): Jurnal Ilmiah Teknik Sipil, Vol. 28 No. 2, September 2024
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2024.v28.i02.p06

Abstract

This study analyzes the performance level of a typical pier structure on the Jakarta-Bandung High-Speed Railway (HSR) bridge located in the Bandung area, focusing on the effects of seismic loads. The structure utilizes double spherical bearings (isolators), and its performance is compared with a similar structure without isolators to evaluate the isolators’ effectiveness under design-level earthquakes. A Non-linear Time History Analysis (NLTHA) was conducted using 11 pairs of ground motion records. These motions were scaled to match the target response spectrum for Bandung using amplitude scaling in the DeepSoil program. Structural analysis was carried out using Midas Civil to determine the seismic performance levels of the piers Additionally, pier displacements were examined to further assess isolator performance. The results show that the structure equipped with isolators maintained a Fully Operational (FO) performance level, indicating minimal damage and full functionality after the earthquake. In contrast, the structure without isolators surpassed the elastic range but remained within the Immediate Occupancy (IO) performance level, suggesting minor damage but continued usability. These findings confirm that the use of isolators significantly enhances the seismic resilience of bridge piers in high-speed railway.
PIER PERFORMANCE LEVEL OF JAKARTA-BANDUNG HIGH SPEED RAILWAY WITH ISOLATOR UNDER EARTHQUAKE LOADS USING TIME HISTORY ANALYSIS Amirah Zakiyyah; Aris Aryanto; Bayu Wintoro
Jurnal Ilmiah Teknik Sipil Vol. 28 No. 2 (2024): Jurnal Ilmiah Teknik Sipil, Vol. 28 No. 2, September 2024
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2024.v28.i02.p06

Abstract

This study analyzes the performance level of a typical pier structure on the Jakarta-Bandung High-Speed Railway (HSR) bridge located in the Bandung area, focusing on the effects of seismic loads. The structure utilizes double spherical bearings (isolators), and its performance is compared with a similar structure without isolators to evaluate the isolators’ effectiveness under design-level earthquakes. A Non-linear Time History Analysis (NLTHA) was conducted using 11 pairs of ground motion records. These motions were scaled to match the target response spectrum for Bandung using amplitude scaling in the DeepSoil program. Structural analysis was carried out using Midas Civil to determine the seismic performance levels of the piers Additionally, pier displacements were examined to further assess isolator performance. The results show that the structure equipped with isolators maintained a Fully Operational (FO) performance level, indicating minimal damage and full functionality after the earthquake. In contrast, the structure without isolators surpassed the elastic range but remained within the Immediate Occupancy (IO) performance level, suggesting minor damage but continued usability. These findings confirm that the use of isolators significantly enhances the seismic resilience of bridge piers in high-speed railway.
Expansive Soil Stabilization Using Lime and Bottom Ash to Increase the CBR Value: A Case of Cililin Soil Ahmad Fauzi Setiawan; Erlangga Rahadian; Geni Firuliadhim; Bayu Wintoro
Potensi: Jurnal Sipil Politeknik Vol. 27 No. 2 (2025): 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.v27i2.5179

Abstract

Soil stabilization plays a crucial role in enhancing the bearing capacity of soils to support structural loads, particularly in road construction projects involving soft soils with inherently low strength. This study investigates the feasibility of using bottom ash, a coal industry waste, as a soil stabilizing agent. Utilizing bottom ash not only aims to improve soil mechanical properties but also addresses environmental concerns associated with coal waste disposal. Laboratory tests were conducted to evaluate the index properties (specific gravity, Atterberg limits, and grain size distribution) and engineering properties (compaction characteristics, swelling behavior, and unconfined compressive strength) of soil treated with varying proportions of bottom ash. The results demonstrate that the addition of bottom ash significantly enhances the soil’s bearing capacity and reduces swelling potential, indicating its suitability for application as a subgrade layer in pavement construction. The addition of 13% lime combined with varying percentages of bottom ash significantly improved the soil’s properties, with CBR values increasing to between 11% and 15%, compared to the untreated soil. This study highlights the potential of bottom ash as an effective and sustainable soil stabilizer, contributing to both infrastructure development and industrial waste management.
Co-Authors Ahmad Fauzi Setiawan Amirah Zakiyyah Aris Aryanto Erlangga Rahadian Geni Firuliadhim