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بررسی آسیبپذیری لرزهای دکلهای نگهدارنده مشعل با استفاده از تحلیل دینامیکی افزایشی | ||
| نشریه مهندسی عمران امیرکبیر | ||
| مقاله 15، دوره 54، شماره 9، آذر 1401، صفحه 3509-3528 اصل مقاله (1.65 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/ceej.2022.20656.7491 | ||
| نویسندگان | ||
| سعیده کوهستانی1؛ بیژن سیاف زاده1؛ عبدالرضا سروقد مقدم2؛ مهدی شریفی* 1 | ||
| 1دانشکده فنی مهندسی، دانشگاه قم، قم، ایران | ||
| 2پژوهشگاه بین المللی زلزله شناسی و مهندسی زلزله، تهران، ایران | ||
| چکیده | ||
| آسیبپذیری کارخانههای صنعتی به حوادث طبیعی، نگرانیهای جهانی را به دلیل ناتوانی عمومی کشورها در پیشبینی میزان تأثیرات و آمادگی برای پیامدهای ناشی از وقوع این دسته از رویدادها، ایجاد کرده است. در این راستا بررسی اثرات لرزهای بر روی تجهیزات کارخانهها، یک مسئلهی استراتژیک میباشد. یکی از تجهیزاتی که در عمده کارخانههای صنایع نفت و گاز موجود میباشد مشعل است. مشعلها دودکشهایی هستند که در آن گازهای اضافی قابل اشتعال قبل از آن که مشکلی برای تاسیسات به وجود آورند سوزانده میشود. ارزیابی لرزهای مناسب این دسته از تجهیزات در گذشته مغفول مانده و بررسی دقیق عملکرد لرزهای این تجهیز میتواند در ارزیابی خسارتهای احتمالی وارد بر آنها در زلزلههای آینده موثر باشد و نقاط ضعف اجزا این دسته از سازهها را مشخص کند. در این پژوهش رفتار لرزهای احتمالاتی دو نمونه از مشعل طراحی و ساخته شده مورد بررسی قرار میگیرد و با استفاده از روش تحلیل دینامیکی افزایشی منحنی شکنندگی و ضریب رفتار آنها استخراج میگردد. نتایج حاصل نشان میدهد در شدتهای لرزهای متعارف مقدار نیاز لرزهای وارد به سازه اصلی قابل ملاحظه نمیباشند اما در محدوده شدتهای نادر احتمال بروز خسارت شدید بر روی مشعلها وجود دارد. همچنین در مطالعات موردی مذکور عملکرد لرزهای دکل 4 وجهی نسبت به دکل 3 وجهی مناسبتر بوده هر چند که در مورد ضریب رفتار این دسته از سازهها به نظر ارزیابیهای لرزهای بیشتری لازم میباشد. | ||
| کلیدواژهها | ||
| ارزیابی لرزهای؛ تحلیل دینامیکی افزایشی؛ منحنیهای شکنندگی؛ ضریب رفتار؛ دکل خرپایی | ||
| موضوعات | ||
| ارزیابی آسیب پذیری لرزه ای | ||
| عنوان مقاله [English] | ||
| Seismic Vulnerability Study of Derrick Supported Flare Using Incremental Dynamic Analysis | ||
| نویسندگان [English] | ||
| saeedeh koohestani1؛ Bijan Sayyafzadeh1؛ abdolreza sarvghad moghadam2؛ mahdi sharifi1 | ||
| 1Department of Civil Engineering, Qom University, Qom, Iran | ||
| 2Associate Professor, Structural Engineering Research Center, International Institute of Earthquakes Engineering and Seismology | ||
| چکیده [English] | ||
| The vulnerability of industrial plants to natural hazards has made the world worried because of countries' general disability about the prediction of the level of effects and preparedness for the consequences of these types of events. For this purpose, seismic assessment of plant equipment is a strategic issue. One of the most equipment that is used in most oil & gas plants is stack flares. Stack flares are a type of stacks that are used for burning additional flammable gases before causing any other problem for other plant facilities. Proper seismic assessment of this type of equipment has been missed in the past and its exact performance evaluation can be effective in determining probable damages in future earthquakes and distinguishing the weakness of components of this type of structure. In this study, probabilistic seismic behavior of two designed and constructed stack flares is investigated and using incremental dynamic analysis their fragility curve and behavior factor are calculated. Results show that in ordinary intensities, the seismic demand of these structures is not considerable but in the range of rare intensities, extreme damages are probable. Also, in the above case studies, the performance of the 4-sided stack with respect to 3-sided stack was more proper and seems more assessment is needed on the suggested behavior factor by codes. | ||
| کلیدواژهها [English] | ||
| Seismic assessment, Incremental dynamic analysis, Fragility curves, Behavior coefficient, Stack flare | ||
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| مراجع | ||
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