مهندسی سازه و ساخت

مهندسی سازه و ساخت

اثر تغییر مشخصات مقاومتی و هندسی مصالح بر رفتار دیوارهای برشی مرکب

نوع مقاله : علمی - پژوهشی

نویسندگان
1 کارشناس ارشد مهندسی سازه، گروه مهندسی عمران، دانشکده مهندسی، دانشگاه فردوسی مشهد، مشهد، ایران
2 استاد گروه مهندسی عمران، دانشکده مهندسی، دانشگاه فردوسی مشهد، مشهد، ایران
چکیده
کاربرد گسترده سیستم‌های نوین باربر جانبی مانند دیوار برشی مرکب، مطالعه و بهینه‌سازی عملکرد این سیستم را ضروری ساخته است. دیوار برشی مرکب مورد مطالعه در این پژوهش از یک ورق فولادی و پانل بتنی تشکیل شده است که توسط برشگیرها به هم متصل می‌شوند. این تحقیق به مدل‌سازی مجزای رفتار فولاد و بتن و بررسی برهم‌کنش آن‌ها پرداخته و حساسیت عملکرد سیستم نسبت به تغییرات در پارامترهای مقاومت مصالح و هندسه اجزا را مورد بررسی قرار داده است. چهار متغیر کلیدی شامل ضخامت ورق فولادی، ضخامت پانل بتنی، مقاومت فشاری بتن، و مقاومت تسلیم ورق فولادی انتخاب و مقادیر متنوعی برای هر یک در نظر گرفته شد. سپس، تأثیر این متغیرها بر مقاومت برشی سیستم پس از راستی‌آزمایی مدل‌سازی با نمونه‌های آزمایشگاهی و شبیه‌سازی 60 مدل ترکیبی در نرم‌افزار آباکوس ارزیابی گردید. نتایج نشان داد که پارامترهای هندسی و ابعادی نسبت به مقاومت مصالح تأثیر بیشتری دارند. به‌عنوان نمونه، افزایش ضخامت ورق فولادی از 5 به 10 میلی‌متر، منجر به افزایش 20 تا 25 درصدی مقاومت برشی شد، درحالی‌که افزایش مقاومت تسلیم ورق فولادی تنها 3 تا 5 درصد تأثیر داشت. همچنین، پاسخ سیستم به تغییر ضخامت پانل‌های بتنی بسیار حساس بود؛ به‌طوری‌که افزایش ضخامت پانل تا 70 تا 80 میلی‌متر، مقاومت برشی را حدود 20 درصد افزایش داد. علاوه بر این، برای کنترل کمانش سیستم، تناسب ضخامت اجزای آن اهمیت ویژه‌ای دارد؛ ضخامت ورق فولادی و پانل بتنی باید متناسب باشند. نتایج نشان دادند که مقدار بهینه‌ای برای هر متغیر وجود دارد که تغییرات سایر عوامل در این حالت تأثیر بیشتری دارند.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

The Effect of Changes in Material Strength and Geometric Properties on the Behavior of Composite Shear Walls

نویسندگان English

Amirhossein Bazrafshan 1
Moein Jalilian 1
Mansour Ghalehnovi 2
1 M.Sc. of Structural Engineering, Civil Engineering Department, School of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
2 Professor, of Structural Engineering, School of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
چکیده English

The widespread application of modern lateral load-resisting systems, such as composite shear walls, necessitates a thorough investigation and optimization of their performance. The composite shear wall studied in this research comprises a steel plate and a concrete panel interconnected by shear connectors. This study focuses on modeling the independent behavior of steel and concrete and analyzing their interaction while investigating the sensitivity of system performance to changes in material strength and geometric parameters. Four key variables, including steel plate thickness, concrete panel thickness, concrete compressive strength, and steel yield strength, were selected with varying values assigned to each. The influence of these variables on the shear strength of the system was evaluated after validating the numerical model against experimental data and simulating 60 different combinations using the Abaqus software. The results revealed that geometric and dimensional parameters have a significantly greater impact on shear strength compared to material strength. For instance, increasing the steel plate thickness from 5 mm to 10 mm resulted in a 20–25% increase in shear strength, whereas an increase in steel yield strength only contributed a 3–5% improvement. Moreover, the system’s response was highly sensitive to changes in concrete panel thickness; increasing the thickness to 70–80 mm enhanced shear strength by approximately 20%. Additionally, maintaining proportionality between the thicknesses of the steel plate and concrete panel is critical for buckling control. The study highlighted the existence of optimal values for each parameter, where variations in other factors become more pronounced. These findings provide valuable insights into the design and optimization of composite shear wall systems.

کلیدواژه‌ها English

Lateral Load-Resisting System
Composite Shear Wall
Shear Strength
Steel Plate Buckling
Reinforced Concrete Panel
Material and Geometric Properties
ABAQUS Software
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  • تاریخ دریافت 28 شهریور 1403
  • تاریخ بازنگری 16 بهمن 1403
  • تاریخ پذیرش 21 اسفند 1403