Perilaku Histeresis Pada Sambungan Circular Hollow Section (CHS) Tipe N Terhadap Pengaruh Variasi Rasio Geometri

Murti, Gandhi Wisnu Hari (2024) Perilaku Histeresis Pada Sambungan Circular Hollow Section (CHS) Tipe N Terhadap Pengaruh Variasi Rasio Geometri. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Produksi migas merupakan aktivitas yang sangat penting dilakukan untuk memenuhi kebutuhan energi dunia. Salah satu penunjang produksi migas adalah digunakannya sebuah bangunan konstruksi baja yang dikenal dengan nama jacket platform. Material baja tipe circular hollow section (CHS) banyak dipilih untuk konstruksi jacket platform karena memiliki banyak kelebihan yang diharapkan mampu menahan beban dengan lingkungan yang ekstrem. Kegagalan pada konstruksi baja tipe circular hollow section (CHS) ini sering kali terjadi pada bagian sambungan. Hasil pengujian menunjukkan adanya tegangan yang tinggi pada bagian sambungan sehingga membuat kegagalan sering terjadi pada area tersebut dikarenakan sendi plastis akan terbentuk terlebih dahulu pada bagian sambungan. Beban dinamis yang bekerja secara terus menerus juga dapat memperbesar peluang terjadinya kegagalan sambungan. Oleh karena itu, harus dilakukan analisa mengenai kapasitas sambungan baja tipe circular hollow section (CHS) melalui kurva histeresis akibat dari adanya beban dinamis yang bekerja pada struktur. Hasil analisis menggunakan program bantu ABAQUS menunjukkan bahwa kegagalan terjadi pada area sambungan sesuai dengan hasil eksperimental dengan nilai perbedaan kapasitas ultimate sebesar 2.66% dan perbedaan daktilitas tarik 4.97% serta daktilitas tekan 2.20%. Pengaruh perubahan rasio β juga memberikan dampak pada sambungan berupa semakin tinggi rasio β maka semakin tinggi pula kapasitas ultimate sambungan namun nilai daktilitas tekan semakin menurun dan tidak berdampak signifikan terhadap daktilitas tarik. Perubahan rasio τ juga memberikan dampak pada sambungan berupa semakin tinggi rasio τ maka semakin tinggi pula kapasitas ultimate namun kenaikan kapasitas tidak signifikan untuk τ > 0.5 dan juga berdampak pada semakin naiknya nilai daktilitas tarik maupun tekan.
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Oil and gas production is a very important activity to meet world energy needs. One of the supports for oil and gas production is the use of a steel construction building known as a jacket platform. Circular hollow section (CHS) type steel material is often chosen for jacket platform construction because it has many advantages which are expected to be able to withstand extreme environmental loads. Failure in circular hollow section (CHS) type steel construction often occurs at the connection. The test results show that there is high stress in the connection section, causing failure to occur frequently in this area because plastic joints will form first at the connection section. Dynamic loads that work continuously can also increase the chance of connection failure. Therefore, an analysis must be carried out regarding the capacity of circular hollow section (CHS) type steel connections using hysteresis curves as a result of dynamic loads acting on the structure. The results of the analysis using the ABAQUS auxiliary program show that failure occurs in the joint area in accordance with the experimental results with a difference in ultimate capacity of 2.66% and a difference in tensile ductility of 4.97% and compressive ductility of 2.20%. The effect of changing the β ratio also has an impact on the connection in the form of the higher the β ratio, the higher the ultimate capacity of the connection, but the compressive ductility value decreases and has no significant impact on the tensile ductility. The change in the τ ratio also has an impact on the connection in the form of the higher the τ ratio, the higher the ultimate capacity but the increase in capacity is not significant for τ > 0.5 and also has an impact on the increasing value of tensile and compressive ductility.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	CHS, Jacket, Sambungan, Histeresis, CHS, Jacket, Joint, Hysteretic
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA347 Finite Element Method T Technology > TA Engineering (General). Civil engineering (General) > TA492.W4 Welded joints T Technology > TA Engineering (General). Civil engineering (General) > TA645 Structural analysis (Engineering) T Technology > TC Hydraulic engineering. Ocean engineering > TC1680 Offshore structures
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22101-(S2) Master Thesis
Depositing User:	Gandhi Wisnu Hari Murti
Date Deposited:	30 Jul 2024 14:33
Last Modified:	30 Jul 2024 14:33
URI:	http://repository.its.ac.id/id/eprint/110042

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