Analisis Respon Seismik Gedung Bertingkat di Pulau Nias dengan Metode Statik dan Dinamik Berdasarkan SNI 03-1726-2012

Fau, Martinus Nifotuho (2017) Analisis Respon Seismik Gedung Bertingkat di Pulau Nias dengan Metode Statik dan Dinamik Berdasarkan SNI 03-1726-2012. S1 thesis, Universitas Kristen Indonesia.

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Abstract

Pada SNI 03-1726-2012 analisis beban gempa dapat dilakukan dengan analisis statik maupun dinamik. Penelitian ini bertujuan untuk menganalisis respon seismik struktur dari bangunan bertingkat di Pulau Nias menggunakan metode statik ekivalen dan dinamik dengan variasi jumlah tingkat menggunakan alat bantu SAP2000 V 16. Struktur yang ditinjau ini ada 3 model bangunan dengan variasi jumlah tingkat, yaitu 4 tingkat, 8 tingkat dan 12 tingkat dengan rasio luasan bangunan 1:2 (1 arah X dan 2 arah Y), dan akan di analisis dengan analisis statik ekivalen dan analisis dinamik baik secara respons spectrum maupun time history. Parameter respon seismik struktur yang ditinjau adalah gaya geser dasar (base shear), perpindahan (displacement) dan rasio simpangan antar lantai (drift ratio). Dari hasil analisis yang dilakukan diperoleh bahwa respon seismik struktur untuk ketiga model yang digunakan hasil analisis statik selalu lebih besar dari analisis dinamik, selanjutnya perbedaan nilai displacement antara analisis statik dan analisis dinamik terus meningkat seiring bertambahnya jumlah tingkat, artinya analisis statik ekivalen memiliki faktor keamanan yang cukup besar sehingga walaupun analisis statik ekivalen aman untuk digunakan, namun tetap perlu digunakan analisis dinamik karena analisis statik ekivalen hanya memperhitungkan respon ragam pertama. Kata kunci: statik ekivalen, dinamik respons spectrum, dinamik time history, respon seismik, rasio luas bangunan. / In SNI 03-1726-2012 seismic load analysis can be conducted with both static analysis and dynamic analysis. The objective of the research was to analyze the seismic response of structure from multy storey building on Nias Island using equivalent static and dynamic method with the variation of the total number of level use the SAP2000 V 16. The structure under review is 3 building models with varying levels of levels, ie 4 levels, 8 levels and 12 levels with a building area ratio of 1: 2 (1 direction X and 2 Y direction), and will be analyzed by static analysis equivalent and dynamic analysis both in response spectrum and time history. The structural seismic response parameters reviewed are base shear, displacement and drift ratio. From the analysis result, it was found that the structural seismic response for the three models used by the static analysis is always greater than the dynamic analysis. Furthermore, the difference of displacement value between static analysis and dynamic analysis continues to increase as the number of levels increases, meaning that equivalent static analysis has a safety factor Is large enough that although equivalent static analysis is safe to use, it is still necessary to use dynamic analysis because equivalent static analysis takes only the first variant response. Keywords: Static equivalent, dynamic response spectrum, dynamic time history, seismic response, ratio of building area.

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