Kumalasari, Aulia Indira (2020) Studi Numerik Terhadap Kinerja Serta Perilaku Elemen Web-Bolted Replaceable Link pada Eccentrically Braced Frames. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Rangka berpegaku eksentrik mensyaratkan untuk membatasi perilaku inelastis hanya terjadi pada balok link sedangkan elemen lainnya tetap dalam kondisi elastis. Link yang didesain menyatu dengan balok induk menjadikan link mengalami over-designed karena harus menahan beban yang besar pula seperti balok induk. Lima spesimen link yang disusun dari dua buah profil C yang disusun secara bersinggungan dan kedua ujungnya dipasang mengapit balok induk dimodelkan secara numerik yang kemudian diberi beban siklik. Analisa dilakukan terhadap rotasi serta energi disipasi yang terjadi pada link. Dari hasil analisis didapatkan rotasi seluruh spesimen mampu melampaui batasan yang disyaratkan yaitu 0.08 rad. Penambahan plat pengaku pada sambungan web menunjukkan bahwa spesimen mampu menahan gaya geser yang lebih besar. Efek pinching ditemukan pada kurva histerisis yang disebabkan oleh efek dari sambungan baut di kedua ujung balok link akibat dari pemberian beban siklik. Sedangkan pemberian diagonal stiffeners memberikan efek yang kurang signifikan pada perilaku web-bolted link namun tetap perlu dilakukan kajian lebih dikarenakan link akan menjadi lebih kaku sehingga kegagalan akan terjadi pada sambungan yang mengakibatkan link mengalami keruntuhan lebih awal. Sedangkan mengkombinasikan plat pengaku sambungan dan diagonal stiffeners mampu menghasilkan link dengan kemampuan disipasi energi yang baik. Selain itu, link dengan berbagai jenis mutu baja mampu menghasilkan hasil yang bervariasi. Elemen dengan mutu baja yang lebih tinggi mampu menghasilkan elemen yang mampu menahan gaya geser yang lebih besar.
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Eccentrically Braced Frames (EBF) restrict the inelastic behavior only occur at the link beam while the other element remains elastic after subjected into lateral load. Occasionally, over-designed link happens because it is designed integrated with the beam floor that has to resist substantial forces. Eight web-bolted replaceable links were modelled numerically. The link specimens were assembled back-to-back from two C-channel sections. Both ends of the C-channel were clamped on the floor beam and connected with 1 inch A490 bolts. Cyclic load was given to the specimens and its behavior were observed. From the analysis, the links were able to meet the requirements to not fail when the rotation is less than 0.08 rad. Additional diagonal stiffeners and connection plate provided larger rotation and it could resist larger shear force. Attached diagonal stiffeners only at the link element gave insignifiant effect for the link to dissipate energy. But, diagonal stiffeners could provide higher rigidity on the link and for that reason, the link with additional diagonal stiffeners must be designed carefully to avoid earlier fracture on the connections. Pinching effect could be observed from the hysteretic curve due to ovalize that happened at the bolt hole as a consequence of cyclic load. Assembled the links with various steel strength also could give a various result. Link with higher strength could provide an element with higher shear capacity.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | RTS 624.171 Kum s-1 2020 |
| Uncontrolled Keywords: | Link dengan sambungan baut, replaceable link, diagonal stiffeners, kurva histerisis, efek pinching. |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA347 Finite Element Method T Technology > TA Engineering (General). Civil engineering (General) > TA645 Structural analysis (Engineering) T Technology > TH Building construction T Technology > TH Building construction > TH1095 Earthquakes and building |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22101-(S2) Master Thesis |
| Depositing User: | Aulia Indira Kumalasari |
| Date Deposited: | 10 Mar 2025 02:14 |
| Last Modified: | 10 Mar 2025 02:14 |
| URI: | http://repository.its.ac.id/id/eprint/73900 |
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