Evaluasi Kinerja Struktur Dual System Asymmetric Dengan Pushover Analysis Dan Time History Analysis

Sudarto, Sudarto (2009) Evaluasi Kinerja Struktur Dual System Asymmetric Dengan Pushover Analysis Dan Time History Analysis. Other thesis, Institut Teknologi Sepuluh Nopember Surabaya.

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Abstract

Perencanaan struktur bangunan gedung tahan gempa di negara Indonesia menjadi suatu hal yang sangat penting mengingat sebagian besar wilayah Indonesia terletak dalam wilayah gempa dengan intensitas moderat hingga tinggi. Trend terbaru perencanaan bangunan tahan gempa saat ini adalah perencanaan berbasis kinerja (Performance-Based Design). Konsep perencanaan berbasis kinerja merupakan kombinasi dari aspek tahanan dan aspek layan. Dalam studi ini satu buah gedung beton bertulang dengan sistem ganda tak simetris (dual system asymmetric) yang mempunyai konfigurasi tidak beraturan berdasarkan denah, bertingkat dua betas, berfungsi sebagai perkantoran, berada di wilayah gempa 6, tanah keras akan didesain sesuai dengan Tata Cara Perencanaan Ketahanan Gempa untuk Bangunan Gedung (SNI 03-1726-2002) dan Tata Cara Perhitungan Struktur Beton untuk Bangunan Gedung (SNI 03-2847-2002). Perilaku seismik struktur gedung ini akan dievaluasi dengan menggunakan analisa beban dorong statik (Pushover Analysis) dan analisa riwayat waktu (Time History Analisys). Titik kinerja untuk analisa pushover dan analisa time history dapat dicari dengan berbagai metode yang terdapat di FEMA 356, ATC-40, FEMA 440 dan SNI 03-1726-2002. Hasil studi menunjukkan analisa pushover menghasilkan daktilitas (J.lc.) aktual dan faktor reduksi gempa (R) aktual yang lebih kecil dari pada Um dan Rm sesuai SNI-03-1726-2002 sehingga analisis pushover cukup rasional untuk digunakan dalam menentukan daktilitas dan faktor R struktur gedung beton bertulang tidak beraturan. Hasil studi menunjukkan titik kinerja dari FEMA 356 dan FEMA 440 menghasilkan performance point yang terbesar sedangkan yang terkecil diperoleh dari SNI-03-1726-2002. Hasil evaluasi performance-based design menunjukkan bahwa struktur gedung yang ditinjau berdasarkan FEMA 356 dan FEMA 440 termasuk dalam tingkat kinerja Life Safety (LS) sehingga gedung memenuhi syarat kinerja yang ditetapkan karena untuk gedung dengan fungsi perkantoran taraf kinerja yang di ijinkan adalah Life Safety , sedangkan berdasarkan ATC-40 strukturgedung berada dalam taraf kinerja Immediate Occupancy (IO). Hasil analisis riwayat waktu menunjukkan displacement (peralihan) yang terjadi untuk gempa El Centro 1940, Santa Cruz 1989, Sierra Madre 1991 , Cape Mendocino 1992, dan Northridge 1994 belum melampaui target peralihan dari FEMA 356 dan FEMA 440, namun Gempa El Centro sudah melampaui target peralihan dari ATC-40 dan SNI 03-1726-2002. Secara keseluruhan baik basil analisa oleh beban gempa riwayat waktu maupun oleh analisa pushover, drift antar tingkat yang terjadi masih lebih kecil atau belum melampaui kinerja batas ultimit SNI 03-1726-2002. Studi kasus dengan be ban gempa riwayat waktu E I Centro 1940, Santa Cruz 1989 , Sierra Madre 1991 , Cape Mendocino 1992, Northridge 1994 apabila dibandingkan dengan analisa pushover, secara umum basil peralihan, drift, perbandingan base shear Vs roof displacement yang terjadi jauh lebih kecil, maka analisa pushover cukup rasional dan dapat diandalkan pada evaluasi perilaku seismik
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Planning earthquake-resistant building structures in Indonesia is very important considering that most of Indonesia is located in earthquake areas with moderate to high intensity. The latest trend in earthquake-resistant building planning today is performance-based planning. The concept of performance-based planning is a combination of custody aspects and service aspects. In this study, a reinforced concrete building with an asymmetric dual system (dual system asymmetric) which has an irregular configuration based on the floor plan, has two floors, functions as an office, is located in earthquake area 6, hard ground will be designed in accordance with Resilience Planning Procedures Earthquake for Buildings (SNI 03-1726-2002) and Procedures for Calculating Concrete Structures for Buildings (SNI 03-2847-2002). The seismic behavior of this building structure will be evaluated using static push load analysis (Pushover Analysis) and time history analysis (Time History Analisys). Performance points for pushover analysis and time history analysis can be searched using various methods contained in FEMA 356, ATC-40, FEMA 440 and SNI 03-1726-2002. The study results show that pushover analysis produces actual ductility (J.lc.) and actual earthquake reduction factor (R) which are smaller than Um and Rm according to SNI-03-1726-2002 so that pushover analysis is rational enough to be used in determining ductility and factors. R irregular reinforced concrete building structure. The study results show that the performance points from FEMA 356 and FEMA 440 produce the largest performance points, while the smallest are obtained from SNI-03-1726-2002. The results of the performance-based design evaluation show that the building structure reviewed based on FEMA 356 and FEMA 440 is included in the Life Safety (LS) performance level so that the building meets the specified performance requirements because for buildings with office functions the permitted performance level is Life Safety, whereas based on ATC-40 the building structure is in the Immediate Occupancy (IO) performance level. The results of the time history analysis show the displacements that occurred for the 1940 El Centro, 1989 Santa Cruz, 1991 Sierra Madre, 1992 Cape Mendocino, and 1994 Northridge earthquakes. has not exceeded the transition targets from FEMA 356 and FEMA 440, but the El Centro Earthquake has exceeded the transition targets from ATC-40 and SNI 03-1726-2002. Overall, both as a result of analysis by time history earthquake loads and by pushover analysis, the drift between levels that occurs is still smaller or has not exceeded the ultimate performance limit of SNI 03-1726-2002. Case studies with earthquake loads in the time history of E I Centro 1940, Santa Cruz 1989, Sierra Madre 1991, Cape Mendocino 1992, Northridge 1994 when compared with pushover analysis, in general the resulting transitions, drifts, base shear Vs roof displacement ratios that occur are much smaller , then pushover analysis is quite rational and reliable in evaluating seismic behavior

Item Type:	Thesis (Other)
Additional Information:	RSS 624.176 2 Sud e-1 2009
Uncontrolled Keywords:	sistem ganda tak simetris, pushover analysis, time history analysis, performance-based design, titik kinerja, daktilitas struktur; asymmetrical dual systems, pushover analysis, time history analysis, performance-based design, period performance, ductility of structures
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA645 Structural analysis (Engineering) T Technology > TA Engineering (General). Civil engineering (General) > TA658 Structural design
Divisions:	Faculty of Civil Engineering and Planning > Civil Engineering > 22201-(S1) Undergraduate Thesis
Depositing User:	EKO BUDI RAHARJO
Date Deposited:	30 May 2024 02:35
Last Modified:	30 May 2024 02:44
URI:	http://repository.its.ac.id/id/eprint/108009

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