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Journal : civil engineering dimension

The Using of GIS to Delineate the Liquefaction Susceptibility Zones at Yogyakarta International Airport Nicholas Hartono; Teuku Faisal Fathani
Civil Engineering Dimension Vol. 24 No. 1 (2022): MARCH 2022
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (876.579 KB) | DOI: 10.9744/ced.24.1.62-70

Abstract

Spatial analysis is performed to delineate liquefaction susceptibility zones at Yogyakarta International Airport(YIA). The low to medium cohesionless soil consistency is predominantly observed on the upper subsoil. A shallow groundwater level and low fines content have also enlarged the likelihood of earthquake-induced liquefaction. An SPT based liquefaction triggering procedure is adopted in this study to indicate the Factor of Safety (FoS) whereas the Liquefaction Severity Index (LSI) is used to measure the severity of liquefaction by presuming its manifestation. Inverse Distance Weighted (IDW) interpolation in QGIS is chosen to produce a map with 50 m × 50 m grid size. The analysis results show the YIA’s area is prone to undergo liquefaction at various depths. However, thin liquefied layers may not generate sufficient artesian flow pressure to eject water or sand. The LSI analysis concludes that YIA area is categorized as a non-liquefied to moderate severity where the West side is the governing area
Numerical Investigation of Seismic Responses of Fault-Crossing Segmental Water Conveyance Tunnel Ridhwan Afnan Primadika; Teuku Faisal Fathani; Fikri Faris
Civil Engineering Dimension Vol. 28 No. 2 (2026): SEPTEMBER 2026
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/ced.28.2.145-158

Abstract

Tunnels are important infrastructures, but faults and internal water pressure can reduce their seismic performance. These risks are relevant in seismic regions including Indonesia. Although finite element methods are used to analyze tunnel behavior, models with continuous linings overestimate stresses, while the influence of segmental joints remains underexplored. This study investigates the seismic response of the Bener Dam diversion tunnel, Central Java, Indonesia, which crosses an inactive fault and uses segmental lining, using nonlinear time-history finite element analysis. Three scenarios were analyzed: presence versus absence of a fault, empty versus water-filled conditions, and continuous versus jointed linings. The results indicated that fault-crossing tunnels are most vulnerable to horizontal slip, especially under pulse-like earthquakes, with strains concentrated near faults. Water minimally affects deformation but increases internal stress, while segmental joints elevate peak strain yet localize damage. These findings highlighted the need to consider fault, water, and joint effects in seismic tunnel design.