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RESPON SPEKTRA PADA AREA PLTU GORONTALO | Sagay | JURNAL SIPIL STATIK

RESPON SPEKTRA PADA AREA PLTU GORONTALO

Jonathan Franklien Sagay, Fabian J. Manoppo, Lanny D. K. Manaroinsong

Abstract


Respon spektra dan percepatan batuan dasar (PGA) merupakan dua aspek yang dipakai dalam menentukan beban gempa suatu bangunan, dalam pertimbangan aspek tersebut digunakan metode Probabilistic Seismic Hazard Analysis (PSHA)  dimana dibantu dengan software EZ-FRISK 7.52 agar diperoleh nilai PGA pada probabilitas terlampaui 2% dalam 50 tahun dimana gedung di desain untuk menghindari keruntuhan pada Maximum Considered Earthquake (MCE) , parameter-parameter gempa dan karakteristik tanah lokasi menjadi 2 hal yang berkontribusi dalam mendapatkan nilai PGA tersebut. Berdasarkan hasil analisis PSHA didapat PGA pada probabilitas terlampaui 2% dalam 50 tahun atau periode ulang 2500 tahun sebesar 0.6667g, Ss = 1.6 52g dan S1 = 0.824g dengan data tanah lokasi yaitu tanah sedang (Vs=245.9 m/s) dan untuk respon spektra desain berdasarkan SNI 1726-2012 didapat SDS = 1.1013 dan SD1 = 0.824.

Kata kunci : gempa, PSHA, batuan dasar, respon spektra, EZ-FRISK


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