CD Tesis

Evaluasi Sisa Umur Dan Struktur Tangki Penimbun Berdasarkan Data Percepatan Tanah Pada Daerah Rawan Gempa

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In the world of the oil and gas industry, there are various types of equipment used to enable the industry to operate. The equipment that is discussed in this study is the storage tank. Over time, the storage tank will experience a decrease in durability, so it is necessary to carry out periodic maintenance to determine its feasibility. In this case, the authors review its feasibility based on the actual thickness of the latest inspection of the wall plate (shell) and roof, namely 2017. The results are then compared with the thickness of the previous inspection period, namely 2006, so that it has an inspection period of 11 years. From the thickness of the two periods, the annual corrosion rate can be calculated which is then followed by knowing the remaining operating life of each shell and roof plate. The author also analyzes the structural response in the form of stress due to earthquake loads on the storage tank based on ground acceleration data which is then evaluated in several earthquake-prone areas. In this case, the storage tank which is the case study is the tank located in Siak Regency, Riau. This storage tank has 4 tiers of wall plates / shells, namely shell #1 at the bottom, shell #2 above shell #1, followed by shell #3 and shell #4. From the calculation results, it is found that the actual thickness of the four shell and roof plates has a value above the minimum or required thickness, so based on the thickness it is still feasible to operate. The corrosion rate that has the highest level is on the shell #1 with a value of 0,1136 mm/year, while the smallest corrosion rate is on shell #4 with a value of 0,01 mm/year. Based on the thickness and corrosion rate, the remaining life ≥ 19 years for all shells and roof was obtained with the highest age for shell #4, namely 185 years and the lowest for shell #1, which was 19 years. In terms of structural response, stress analysis is carried out on the shell components. The resulting stress is the stress S11 which is the stress that occurs on the x-axis, S22, which is the stress that occurs on the y-axis to the vertical plane of the plate, and S12, which is the stress that occurs on the y-axis plate against the existing plate plane. After analyzing storage tank in the location of Siak Regency, the highest S11 stress was obtained, namely at shell #3 with a value of -28,56 MPa, the largest S22 stress was at shell #3 with a value of -95,2 MPa, and the largest S12 stress was on shell #4 with the value of 33,09 MPa. It is known that the location of Siak Regency is a location prone to minor earthquakes, so the authors conducted an evaluation by applying the storage tank to earthquake-prone locations with moderate soil parameters (North Sumatera), hard soil (Aceh), and rock (West Sumatera). After analyzing the three locations, the results of the received stresses S11, S22, and S12 are getting bigger the harder the soil parameters are. As a safety determination, the calculation results are compared with the allowable stress of the wall plate / shell, where the allowable stress on shell #1 and #2 is 171,68 MPa and shell # 3 and #4 are 188,91 MPa. From the results of the analysis using SAP 2000 software, the structural response
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in the form of stress from the shell plate still has a value lower than the allowable stress value, so that the shell plate is feasible to operate if it is applied to several earthquake-prone locations in this study if only viewed from the wall plate/shell.
Key words : Storage Tank, Remaining Life, Corrosion Rate, Structural Response

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

10 12. 220 (0026)

Penerbit

Pekanbaru : Universitas Riau – Pascasarjana – Tesis Teknik Sipil., 2020

Deskripsi Fisik

xiii, 117 hlm.: ill.: 29 cm

Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

10 12. 220 (0026)

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

TEKNIK SIPIL

Info Detail Spesifik

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Pernyataan Tanggungjawab

FATAH

Versi lain/terkait

Lampiran Berkas

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