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Desnila Sari
Politeknik Negeri Padang
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PENGARUH INTERAKSI TANAH-STRUKTUR PADA TANAH LUNAK TERHADAP DILATASI DARI DUA BANGUNAN TINGGI AKIBAT GEMPA Desnila Sari; Lukman Murdiansyah; Yurisman Yurisman; Oni Guspari
Jurnal Ilmiah Poli Rekayasa Vol 18, No 2 (2023): April
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jipr.18.2.244

Abstract

Earthquakes that occur in buildings can lead to collision force with the next building if the initial gap between the two buildings is not sufficient for its free vibration responses. Collisions can cause amplification of the internal forces in the structural elements and the collision force on the contact zone is usually not considered in the initial design so that it can lead to damage and collapse of buildings. This study aime to determine the effect of Soil-Structure Interaction in the dilatation of two structures in soft soil with consideration of the collision to the next building. The structure is modeled as a structural system with multi degree of freedom (MDOF). The upper structure is considered linear elastic model and does not have damping as well as the lower structure (foundation). The collision can only occur on the floor level of the two buildings in which the contact zone is modeled as an elastic element. The rheological model for Soil-Structure Interaction are taken as a horizontal spring and a rotational spring. Structural dynamic equations was solved by using the Houbolt integration method. The resolution of numerical program was solved by the Matlab software. The results of study showed that soil-strucutre interaction increases the relative displacement under the condition of initial distance (gap) between the two buildings was reduced.
PERBANDINGAN BIAYA PEMBANGUNAN RUMAH SEDERHANA DENGAN RUMAH KONSEP AMAN GEMPA BERDASARKAN ANALISA BENEFIT COST RATIO SKENARIO GEMPA 50 TAHUN Monika Natalia; Zulfira Mirani; Mafriyal Mafriyal; Desnila Sari; Riska Fauziah Hanum
Jurnal Ilmiah Poli Rekayasa Vol 19, No 2 (2024): Bulan April 2024
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jipr.19.2.361

Abstract

In mitigation to minimize the risk of earthquakes, protection is needed to reduce the impacts. Damage caused by earthquakes can be minimized by planning and building earthquake-resistant houses. To get an earthquake-resistant house, by adding earthquake-strengthening components based “Pedoman Teknis Rumah dan Bangunan Gedung Tahan Gempa and SNI 1726-2019”. This research aims to design earthquake-resistant houses concept for an earthquake period of 50 years and analyze the benefit-cost ratio by comparing residential houses designed with earthquake-safe features to conventional residential houses. The concept of earthquake-resistant houses is carried out in conventional type 120 residential houses. The research results that the cost for a conventional residence is IDR 387,223,000 and the cost of an earthquake house concept is IDR. 407,593,000, where there is a cost difference of IDR 20,370,000 or 5% (more expensive). Benefit-cost ratio value for conventional residential houses for the 50-year earthquake scenario is 0.64; 0.71; 0.77; 0.82; and 0.87 where the value of BCR <1, then this residential house is not effective in facing a 50-year earthquake scenario. Benefit-cost ratio for earthquake-safe housing was 1.12; 1.34; 1.58; 1.84; and 2.09. The BCR>1 and the value moves up until the 50th year. So with an additional cost of 5% for earthquake-safe features, this house is considered very effective for the 50-year earthquake period scenario.
Co-Authors Lukman Murdiansyah, Lukman Mafriyal Mafriyal Natalia, Monika Oni Guspari Riska Fauziah Hanum Yurisman Yurisman Zulfira Mirani