Pengaruh Variasi Input Motion Terhadap Gelombang Seismik Di Permukaan Berdasarkan Data N-Spt Di Its Surabaya

Dewanti, Gading Ayu Cahya (2022) Pengaruh Variasi Input Motion Terhadap Gelombang Seismik Di Permukaan Berdasarkan Data N-Spt Di Its Surabaya. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penelitian ini membahas tentang efek variasi input motion terhadap karakteristik amplifikasi tanah dan gelombang seismik di permukaan di ITS Surabaya. Profil gelombang geser tanah pada lokasi didapatkan dari data N-SPT kemudian dilakukan Ground Response Analysis. Tinjauan pertama, gelombang sintetik yang digunakan sebagai input motion dibuat dengan variasi peak ground acceleration (PGA) dengan fase yang sama. Variasi PGA yang digunakan adalah 0,01 g, 0,05 g, 0,1 g, 0,15 g, 0,2 g. Tinjauan kedua, lima gelombang sintetik dan observasi dibuat dengan variasi fase dengan PGA yang sama. Parameter yang digunakan adalah Fourrier Amplitude Ratio (FAR), PSA (Pseudo Spectral Accelertion), Peak Ground Acceleration (PGA), Peak Ground Velocity (PGV), dan Peak Ground Displacement (PGD). Pada variasi PGA, didapatkan kesimpulan bahwa semakin besar nilai variasi input PGA maka semakin kecil FAR dan semakin besar PSA, output PGA, PGV, dan PGD. Pada variasi fase, didapatkan bahwa frekuensi dominan terjadi pada rentang 0-10 Hz pada FAR dan PSA output. Didapatkan bahwa tidak terjadi perbedaan yang signifikan pada FAR. PSA dan PGD yang didapatkan cenderung naik seiring pertambahan variasi fase. PGA dan PGV cenderung semakin mengecil seiring bertambahnya variasi fase. Pada variasi karakteristik spektrum didapatkan bahwa semakin tinggi frekuensi dominan maka semakin besar FAR, semakin rendah PGV, semakin besar PGD.
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This study discusses the effect of variations in motion input on the characteristics of soil amplification and seismic waves on the surface. The soil profile at the location obtained from the N-SPT data was then carried out with a Ground Response Analysis. The first review, synthetic waves used as motion input are made with variations in peak ground acceleration (PGA) with the same phase. The variations of PGA used were 0.01 g, 0.05 g, 0.1 g, 0.15 g, 0.2 g. In the second review, five synthetic and observed waves were made with phase variations with the same PGA. The parameters used are Fourrier Amplitude Ratio (FAR), PSA (Pseudo Spectral Acceleration), PGA (Peak Ground Acceleration), PGV (Peak Ground Velocity), and PGD (Peak Ground Displacement). In the PGA variation, it is found that the greater the PGA input variation, the greater the FAR, PSA, PGA output, PGV, and PGD. In the phase variation, it was found that there was no significant difference in FAR, no correlation was found between the phases and PSA, PGA, PGV, and PGD. In the variation of characteristics, it was found that the higher the frequency, the greater the FAR, the lower the PGV, the greater the PGD. No correlation was found in PSA and PGD

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Amplifikasi, Efek Non Linear, Ground Response Analysis, Amplification, Non Linear Effect, Ground Response Analysis.
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis
Depositing User:	Mr. Marsudiyana -
Date Deposited:	08 Oct 2025 06:52
Last Modified:	08 Oct 2025 06:52
URI:	http://repository.its.ac.id/id/eprint/128512

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