بررسی عددی و تحلیلی رفتار لرزه‌ای پانل‌های برشی تسلیمی با تمرکز بر پارامترهای کلیدی تأثیرگذار

نادری, نوید; جلیلی, سحر; توانا, محمدهادی

doi:10.22065/jsce.2026.549805.3830

بررسی عددی و تحلیلی رفتار لرزه‌ای پانل‌های برشی تسلیمی با تمرکز بر پارامترهای کلیدی تأثیرگذار

نوع مقاله : علمی - پژوهشی

نویسندگان

نوید نادری ¹

سحر جلیلی ²

محمدهادی توانا ²

¹ دانشجوی دکتری، دانشکده فنی و مهندسی، گروه مهندسی عمران، واحد کرمانشاه، دانشگاه آزاد اسلامی، کرمانشاه، ایران

² استادیار، دانشکده فنی و مهندسی، گروه مهندسی عمران، واحد کرمانشاه، دانشگاه آزاد اسلامی، کرمانشاه، ایران

10.22065/jsce.2026.549805.3830

چکیده

میراگرهای برشی تسلیم‌شونده به دلیل ویژگی‌هایی مانند سهولت نصب، قابلیت تعویض و توان بالای استهلاک انرژی، راهکاری اقتصادی برای ارتقای عملکرد لرزه‌ای سازه‌ها هستند. این مطالعه به صورت عددی و تحلیلی رفتار لرزه‌ای پانل‌های برشی تسلیمی را مورد بررسی قرار داد. بدین منظور، پس از صحت‌سنجی مدل اجزای محدود با نتایج آزمایشگاهی، مجموعه‌ای شامل ۵۴ مدل پارامتریک با دو ارتفاع مختلف تعریف گردید. هدف اصلی این تحلیل‌ها، بررسی تأثیر پارامترهای کلیدی نظیر نسبت لاغری ورق، درصد سطح بازشو و نیروی محوری بر عملکرد لرزه‌ای این میراگرها بود. در ابتدای مطالعه، بار بحرانی کمانشی ورق برشی محاسبه شد و سپس درصدی از آن به عنوان نیروی محوری به مدل‌ها اعمال گردید. تمامی تحلیل‌ها به صورت استاتیکی غیرخطی انجام گرفت و از منحنی‌های نیرو-جابجایی، شاخص‌های کلیدی شامل سختی الاستیک، مقاومت نهایی و ظرفیت اتلاف انرژی استخراج شد. سپس به منظور برآورد این نتایج، معادلاتی تقریبی بر اساس برازش منحنی پیشنهاد شد. نتایج نشان داد که افزایش نیروی محوری موجب کاهش سختی و مقاومت شده و این اثر در مدل‌های با ضخامت بیشتر چشمگیرتر بود. افزایش ۲۰% بازشو به‌طور میانگین موجب کاهش حدود ۲۸% در مقاومت و ۲۸% در جذب انرژی شد؛ این افت در حضور نیروی محوری ۱۶% بار بحرانی تشدید شد و به %‎۳۷ در مقاومت نهایی و ۳۶% در سختی الاستیک رسید. معادلات تحلیلی پیشنهادی، علاوه بر ارائه دقت مناسب، این قابلیت را دارند که رفتار سازه را در بازه‌های میانی پارامترها برون‌یابی و تخمین زده و به‌عنوان ابزاری کاربردی در فرآیند طراحی این میراگرها مورد استفاده قرار گیرند

کلیدواژه‌ها

پانل برشی تسلیمی

نیروی محوری

سختی الاستیک

مقاومت نهایی

اتلاف انرژی

موضوعات

کنترل فعال و غیر فعال سازه ها

عنوان مقاله English

Numerical and Analytical Investigation of the Seismic Behavior of Yielding Shear Panels with a Focus on Key Influential Parameters

نویسندگان English

Navid Naderi ¹

Sahar Jalili ²

Mohammad Hadi Tavana ²

¹ Ph.D. StudentDepartment of Civil Engineering, Ker.C., Islamic Azad University, Kermanshah, Iran.

² Assistant Professor, Department of Civil Engineering, Ker.C., Islamic Azad University, Kermanshah, Iran.

چکیده English

Yielding shear panels, due to features such as ease of installation, replaceability, and high energy dissipation, are considered an economical solution for enhancing seismic performance. This study numerically and analytically investigated the seismic behavior of yielding shear panels. After validating the finite element model against experimental results, a set of 54 parametric models with two different heights was developed. The primary aim of these analyses was to evaluate the influence of key parameters, including slenderness ratio, opening percentage, and axial force, on seismic performance of these dampers. At the outset, the critical buckling load of the shear plate was calculated, and a fraction of this load was applied as axial force to the models. All analyses were conducted through nonlinear static procedures, and from the force–displacement curves, seismic indices such as elastic stiffness, ultimate strength, and energy dissipation capacity were extracted. Approximate equations were proposed based on curve-fitting techniques to estimate these results. The findings revealed that increasing axial force reduces both stiffness and strength, with the effect more pronounced in thicker plate models. Increasing the opening ratio by 20% led, on average, to reductions of about 28% in both strength and energy dissipation. Under an additional axial force corresponding to 16% of the critical buckling load, this reduction was further intensified, reaching 37% in ultimate strength and 36% in elastic stiffness. The proposed analytical equations not only provided acceptable accuracy but also demonstrated the capability to extrapolate and predict structural behavior within intermediate parameter ranges, offering a practical tool for design of such dampers.

کلیدواژه‌ها English

Yielding Shear Panel

Axial Force

Elastic Stiffness

Ultimate Strength

Energy Dissipation

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