PENGARUH VARIASI DIMENSI BALOK TERHADAP PERSEBARAN POLA SENDI PLASTIS DAN KINERJA STRUKTUR GEDUNG BERATURAN TAHAN GEMPA

CAHYA NINGRUM, NURLELA (2020) PENGARUH VARIASI DIMENSI BALOK TERHADAP PERSEBARAN POLA SENDI PLASTIS DAN KINERJA STRUKTUR GEDUNG BERATURAN TAHAN GEMPA. S1 thesis, Universitas Mercu Buana Jakarta.

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Abstract

This study continues the research of Andhika Hidayat (2018). In this study, a plastic joint distribution scheme test for earthquake loads using 5 models of 4-level building plans with variations in dimensions and distances between the study columns concluded that the greater the distance between columns, the more the value of displacement and base force is also great and with the use of variations in column dimensions between floors can provide economic benefits, but in this study has not resulted in a scheme of hinge sequence sequential distribution (hinge sequence) according to FEMA 451b (2007) In this study the plan used is model 5 of the research of Andhika Hidayat (2018). This research tries to vary the dimensions of the beam between floors with normal beam geometry and wide beam using pushover method with the help of ETABS v.16 software so that it is expected to produce the distribution plastic joint patterns in sequence, get a more optimal building structure performance than previous studies and be a comparison of the results of the use of beams with normal geometry and wide beam. From the results of this study it can be concluded that with variations in beam dimensions between floors there is an increase in the value of base force and a decrease in displacement compared to research by Andhika Hidayat (2018) and the results of variations in beam dimensions between floors with the wide beams result in a decrease in the value of the base force and the increase in displacement value compared to previous studies both variations in dimensions between floors with normal beam geometry and wide beam results in the spread of plastic joints that still occur simultaneously (simultaneous hinging) Keywords: Beam, Dimension, Pushover, Plastic Joint Penelitian ini melanjutkan penelitian dari Andhika Hidayat (2018) pada penelitian tersebut dilakukan uji skema sebaran sendi plastis terhadap beban gempa dengan menggunakan 5 model denah gedung beraturan 4 tingkat dengan adanya variasi dimensi dan jarak antar kolom penelitian tersebut menyimpulkan bahwa semakin besar jarak antar kolom maka semakin besar pula nilai perpindahan (displacement) dan gaya geser (base force) dan dengan digunakannya variasi dimensi kolom antar lantai dapat memberikan keuntungan dari segi ekonomis namun dalam penelitian tersebut belum menghasilkan skema persebaran sendi plastis yang berurutan (hinge sequence) menurut FEMA 451b (2007) Pada penelitian ini denah yang digunakan adalah model 5 dari penelitian andhika hidayat (2018) penelitian ini mencoba memvariasikan dimensi balok antar lantai dengan geometri balok normal dan balok tidur (wide beam) menggunakan metode pushover dengan bantuan software ETABS v.16 sehingga diharapkan mampu menghasilkan persebaran pola sendi plastis secara berurutan, mendapatkan kinerja stuktur gedung yang lebih optimal dari penelitian sebelumnya dan menjadi pembanding hasil terhadap penggunaan balok dengan geometri normal dan geometri balok tidur (wide beam). Dari hasil penelitian ini dapat disimpulkan bahwa dengan adanya variasi dimensi balok antar lantai terjadi peningkatan nilai base force dan penurunan nilai displacement dibandingkan dengan penelitian milik andhika hidayat (2018) dan hasil dari variasi dimensi balok antar lantai dengan geometri balok tidur menghasilkan penurunan nilai base force dan kenaikan nilai displacement dibandingkan dengan penelitian sebelumnya baik variasi dimensi antar lantai dengan geometri balok normal maupun geometri balok tidur (wide beam) menghasilkan persebaran sendi plastis yang masih terjadi secara serentak (simultaneou hinging) Kata kunci : Balok,Dimensi,Pushover,Sendi Plastis

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