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بررسی تأثیر ترک بر رفتار دیوار برشی فولادی تحت بار جانبی | ||
| نشریه مهندسی عمران امیرکبیر | ||
| مقاله 10، دوره 53، شماره 4، تیر 1400، صفحه 1403-1424 اصل مقاله (2.41 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/ceej.2020.16928.6396 | ||
| نویسندگان | ||
| علی قمری* 1؛ وحید بروجردیان2 | ||
| 1واحد دره شهر، دانشگاه آزاد اسلامی، دره شهر، ایران | ||
| 2دانشکده مهندسی عمران، دانشگاه علم و صنعت ایران، تهران، ایران | ||
| چکیده | ||
| مطالعات آزمایشگاهی و عددی انجام شده بر روی دیوار برشی فولادی و همچنین عملکرد موفق آن در زلزله‌های گذشته، این سیستم را به عنوان یک سیستم کارا در برابر بارهای جانبی معرفی کرده است. هر چند مطالعات وسیعی (به جز مطالعات در خصوص تاثیر ترک بر رفتار دیوار برشی فولادی) بر روی این سیستم انجام شده‌است، اما همچنان ناشناخته‌هایی در خصوص این سیستم وجود دارد. تاثیر ترک بر رفتار دیوار برشی فولادی یکی از ناشناخته‌ها در خصوص دیوار برشی فولادی است که به دلیل پیچیدگی‌های تحلیل غیرخطی ترک و گسترش آن حتی با استفاده از نرم افزارهای المان محدود، به طور جامع مورد بحث بررسی قرار نگرفته است. از طرفی با توجه ضخامت کم ورق فولادی و ماهیت جوش، وجود ترک در این سیستم غیرقابل انکار و اجتناب ناپذیر است. بنابراین در این مقاله، تاثیر ترکهای میانی و کناری و گسترش آنها بر رفتار لرزهای دیوار برشی فولادی مورد بررسی قرار گرفته است. نتایج نشان می‌دهد که ترکهای میانی در ورق فولادی اثر مخرب تری نسبت به ترکهای کناری دارد. وجود ترکهای میانی با طول زیاد باعث می‌شود که سیستم رفتار غیرالاستیک را تجربه نکند و در ناحیه الاستیک گسیخته شود. همچنین گسترش ترک تاثیر کمی بر سختی الاستیک دارد. با توجه به پیچیدگی‌های ترک بر رفتار دیوار برشی فولادی، معادلات لازم برای دستیابی به نمودار پوش آور آن ارائه شده‌است که بدون نیاز به مدل‌سازی المان محدود، رفتار سیستم با دقت بسیار بالا قابل پیش‌بینی است. | ||
| کلیدواژه‌ها | ||
| دیوار برشی فولادی؛ ترک؛ رفتار لرزهای؛ سختی؛ مقاومت | ||
| موضوعات | ||
| دیوار برشی؛ رفتار لرزه ای | ||
| عنوان مقاله [English] | ||
| Influence of crack on the behavior of steel plate shear wall under lateral loading | ||
| نویسندگان [English] | ||
| Ali Ghamari1؛ Vahid Broujerdian2 | ||
| 1Department of Civil Engineering, Darreh Shahr Branch, Islamic Azad University, Darreh Shahr, Iran | ||
| 2Department of Civil Engineering, Iran University of Science and Technology, Tehran, Iran | ||
| چکیده [English] | ||
| Experimental and numerical studies of Steel Plate Shear Wall (SPSW) and its successful performance under past earthquakes have introduced this system as a lateral bearing system. There is a lot of unknown information about SPSW despite reported numerous studies. The effect of crack on the SPSW behavior is one of the unknown aspects of SPSW. Although crack had affected some experimental tests, its effect on the SPSW behavior has not been investigated comprehensively. Even in numerical studies, due to the complicity of the crack in modeling and analyzing especially in nonlinear studies, it has not been evaluated comprehensively. Because of the thin steel plate and inherent welding, the emerging of the crack in SPSW is deniable. Therefore, in this paper, the effect of central and edge cracks on the behavior of SPSW was studied numerically and parametrically. Numerical results indicated that the central crack is more destructive than edge cracks in case of fracture, ultimate strength, and energy absorption. Although small cracks do not have a considerable effect on the behavior of SPSW, the central crack with a long length leads the SPSW to fracture in the elastic zone. Moreover, although long edge crack reduces ultimate strength and energy absorption, it does not lead the SPSW to fracture. Due to the difficulty of crack modeling and crack analysis in SPSW, the necessary relations were proposed to obtain a pushover diagram without needing to modeling. The proposed relation estimates the pushover diagram of the system in good agreement with FE results. | ||
| کلیدواژه‌ها [English] | ||
| Steel Shear Wall, Crack, Seismic Behavior, Stiffness, Strength | ||
| مراجع | ||
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