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All Journal Science and Technology Indonesia RACIC : Rab Construction Research Syntax Literate: Jurnal Ilmiah Indonesia Astonjadro Jurnal Pensil : Pendidikan Teknik Sipil Jurnal Infrastruktur G-Tech : Jurnal Teknologi Terapan Smart City Makara Journal of Technology Indonesian Geotechnical Journal CSID Journal of Infrastructure Development Jurnal Sipakatau
Sjah, Jessica
Department Of Civil And Environmental Engineering, Faculty Of Engineering, Universitas Indonesia
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Seismic Performance Evaluation of Laboratory Building with Concrete Column Jacketing Based on ASCE 41-17 using Pushover Analysis Aditya Rihadatul Aisy; Josia Irwan Rastandi; Jessica Sjah
G-Tech: Jurnal Teknologi Terapan Vol 10 No 3 (2026): G-Tech, Vol. 10 No. 3 July 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i3.9704

Abstract

This study presents comprehensive seismic performance evaluation on the laboratory building structure designed using the old regulations (SNI 1726:2002 and SNI 2847:2002) and has been strengthened with concrete column jacketing through a pushover analysis procedure based on ASCE 41-17 guidelines. Based on the global performance of the structure, the structure drift have met the performance targets with a maximum drift of 1.92% for the X direction and 1.96% for the Y direction. Based on the analysis of the deformation-controlled action, the rotation values ​​that occur in the beam components have met the performance targets with a maximum rotation of 0.0066 for negative moments and 0.0073 for positive moments. While the strain that occurs in the column components have also met the performance targets with a maximum strain of 0.0032 for rebar compression strain, 0.0131 for rebar tensile strain, and 0.0024 for concrete compression strain. Then, based on the analysis of the force-controlled action, the DCR values ​​for shear and axial in the column components have met the performance targets with a maximum value for shear of 0.89 and for axial of 0.61. While the DCR values ​​for shear in the beam components partially exceed the performance targets with a maximum value of 1.29.
Experimental Studies of Compressive Strength of Sustainable Concrete with Partial Cement Substitution Using Palm Oil Boiler Ash Suraedi, Daral; Sjah, Jessica; Handika, Nuraziz; Aulia, Saffanah Fasya; Edwardo, Karmenita Olivia
CSID Journal of Infrastructure Development Vol. 9, No. 1
Publisher : UI Scholars Hub

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Abstract

This study investigates the mechanical performance of sustainable concrete incorporating Palm Oil Boiler Ash (POBA) as a partial cement replacement. As the construction sector seeks to reduce CO₂ emissions and manage agro-industrial waste, POBA emerges as a promising supplementary cementitious material due to its pozzolanic potential and abundance in palm oil–producing regions such as Indonesia.Concrete specimens were prepared with POBA substitution levels ranging from approximately 10% to 30% by weight of cement, in combination with nanosilica and a polycarboxylate ether (PCE) superplasticizer to enhance performance. The mix design was developed in accordance with ACI 211 guidelines to maintain comparable workability across all mixtures.Compressive strength was evaluated at 3, 14, 28, and 56 days. Results indicate that while early-age strength decreases with increasing POBA content, an optimal replacement level of 19% demonstrated compressive strength comparable to the control mixture at later ages under the tested mix design conditions. The inclusion of nanosilica, based on prior experimental validation, is considered to have contributed to mitigating early strength reduction and supporting microstructural development. The study concludes that POBA, when applied at an optimal replacement level, can serve as a viable partial cement substitute for structural concrete applications, supporting environmental sustainability and low-carbon infrastructure development.
NONLINEAR SEISMIC ANALYSIS: VISCOUS DAMPERS VS CONVENTIONAL DUAL SYSTEMS IN DATA CENTER Dimas Prasasti Renandhito; Josia Irwan Rastandi; Jessica Sjah
Jurnal Pensil : Pendidikan Teknik Sipil Vol. 15 No. 3 (2026): Jurnal Pensil : Pendidikan Teknik Sipil
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jpensil.v15i3.67524

Abstract

The seismic resistance of data center is crucial due to its contribution to the ability to maintain business continuity when faced with a high seismic force. In this subject, the current paper aims at performing a comparative analysis of the structural behavior of conventional dual system and modified system equipped with fluid viscous dampers to reveal different approaches towards the development of seismic resistant design. Nonlinear time history analysis was applied using 11 sets of ground motion records for different earthquakes. Three damper schemes were compared to the conventional dual system design, the performance indicators of which were evaluated as base shear, story drift, and structural mass. The obtained results have shown that the use of fluid viscous dampers affects the dynamic behavior of structures resulting in up to 60% decrease in base shear values while improving the control of deformations, decreasing the values of average story drift in X by 5% and in Y direction by 39%. Moreover, the damp models showed a reduction in the values of structural mass of approximately 18.8%.
Co-Authors Aditya Rihadatul Aisy Aditya Rihadatul Aisy Ahmad Ashari Ananda Putri Swastinitya Angela Ayu Putri Arijoeni, Essy Asri Puspita Sari Sidabutar Aulia, Saffanah Fasya Bambang Trigunarsyah, Bambang Dahlan, Astryd Viandila Daral Suraedi Dimas Prasasti Renandhito Edwardo, Karmenita Olivia Elfiranahla Chandra Dewi Elly Tjahjono, Elly Erly Bahsan Hafiyya Izzah Aini Handika, Nuraziz Idhar, Ridha Amalia James Jatmiko Oetomo Jonbi Josia Irwan Rastandi Oktoria Masniari Pratiwi, Siva Yuniar Rahmatika, Iftita Rarasati, Ayomi Dita Rastandi, Josia Irwan Rika, R.R. Dwinanti Suntarto, Rut Puspaningtyas Tohho, Given Tri Eddy Susanto