نشریه علمی سازه و فولاد

نشریه علمی سازه و فولاد

مطالعه ضرایب لرزه‌ای دیوار برشی فولادی صاف-موج‌دار دوبل ذوزنقه‌ای تحت بارگذاری چرخه‌ای

نوع مقاله : مقاله پژوهشی

نویسندگان
1 دانشجوی دکتری، گروه مهندسی عمران، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات، تهران
2 دانشیار، گروه مهندسی عمران، دانشگاه آزاد اسلامی واحد علوم و تحقیقات، تهران
3 استادیار، گروه مهندسی عمران، دانشگاه آزاد اسلامی واحد علوم و تحقیقات، تهران
چکیده
زمینۀ پژوهش: در راستای بهبود عملکرد لرزه‌ای و کنترل تغییرمکان‌های جانبی سازه‌ها، این پژوهش یک سیستم نوین دیوار برشی فولادی معرفی می‌کند. هدف اصلی این مطالعه، ارزیابی واقع‌بینانۀ کارایی این سیستم در ارتقای مقاومت جانبی و جلوگیری از فروریزش سازه تحت زلزله‌های شدید است.
روش پژوهش: در این مطالعه، ابتدا رفتار سه نوع دیوار برشی فولادی شامل: صاف (FSPSW)، تک‌لایۀ موج‌دار (VCSPSW) و سیستم ترکیبی (VDCFSPSW) تحت بارگذاری چرخه‌ای مطابق پروتکل بارگذاری SAC با استفاده از مدل‌های عددی در نرم‌افزار اجزای محدود تحلیل شد. نتایج حاصل از مدل‌سازی عددی با نتایج آزمایشگاهی تطابق قابل‌توجهی داشت که نشان‌دهندۀ صحت کار است. در مرحلۀ بعد، مطالعات پارامتریک بر روی سیستم ترکیبی با ورق موج‌دار دوبل قائم انجام گرفت که شامل بررسی نسبت‌های ابعادی b/h از 5/0 تا 5/2 و زوایای موج 30، 45، 60 درجه و نسبت عرض ورق موج‌دار دوبل به عرض دهانۀ 25، 50 و 75 درصد در مدل ترکیبی بود.
یافته‌ها: نتایج تحلیل عددی نشان می‌دهد که مدل ترکیبی VDCFSPSW-30-50% در مقایسه با مدل VCSPSW-30، در نسبت‌های ابعادی b/h بین 5/0 تا 5/1 بهبود قابل‌توجهی در مقاومت بیشینه (بین 42/4 تا 80/13 درصد) از خود نشان می‌دهد. همچنین، این مدل در نسبت ابعادی b/h برابر 5/2 مقاومت یکسانی با مدل FSPSW دارد که عملکرد مطلوب سیستم را تأیید می‌کند. علاوه بر این، میانگین ضریب شکل‌پذیری در سیستم‌های ترکیبی VDCFSPSW نسبت به دیوارهای برشی صاف و میانگین ضریب رفتار آن نسبت به دیوارهای برشی تک‌لایۀ موج‌دار و دیوارهای برشی دوبل‌موج‌دار و ترکیبی HDCFSPSW برتری چشم‌گیری دارد، که نشان‌دهندۀ بهبود عملکرد لرزه‌ای در این سیستم‌های ترکیبی است.
نتیجه‌گیری: مدل ترکیبی VDCFSPSW با دارابودن شکل‌پذیری بالاتر نسبت به مدل‌ صاف و ضریب رفتار و بیشینه مقاومت بالاتر نسبت به بسیاری از مدل‌های موج‌دار، عملکرد مطلوب همراه با طرح اقتصادی‌ را نشان می‌دهد. این سیستم به‌دلیل قابلیت بازتوزیع نیرو و رفتار غیرالاستیک مناسب، به‌عنوان جایگزینی کارآمد برای سایر دیوارهای برشی فولادی توصیه می‌شود.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Study of Seismic Factors of a Flat-Double Corrugated Trapezoidal Steel Shear Wall under Cyclic Loading

نویسندگان English

Ramin Mansouri 1
Fereshteh Emami 2
Pasha Javadi 3
1 PhD Student, Department of civil engineering, SR.C, Islamic Azad University, Tehran, Iran
2 Associate Professor, Department of civil engineering, SR.C, Islamic Azad University, Tehran, Iran
3 Assistant Professor, Department of civil engineering, SR.C, Islamic Azad University, Tehran, Iran
چکیده English

Background: To improve seismic performance and control the lateral displacements of structures, this research introduces a novel steel shear wall system. The primary objective of this study is to realistically evaluate the effectiveness of this system in enhancing lateral resistance and preventing structural collapse under severe earthquakes.
Methods: In this study, the behavior of three types of steel shear walls, including: Flat Steel Plate Shear Wall (FSPSW), Vertically Single-layer Corrugated Steel Plate Shear Wall (VCSPSW), and the hybrid system (VDCFSPSW) under cyclic loading following the SAC loading protocol, was analyzed using numerical models in Finite Element software. The results obtained from the numerical modeling showed significant agreement with experimental results, demonstrating the validity of the work. In the subsequent stage, parametric studies were conducted on the Vertically Double Corrugated-Flat Steel Plates Shear Wall (VDCFSPSW) featuring double vertical corrugated plates, which included investigating dimensional ratios b/h from 0.5 to 2.5, corrugation angles of 30, 45, 60 and the ratio of the double corrugated plate width to the opening width 25%, 50%, 75% in the hybrid model.
Results: Numerical analyses results indicate that the VDCFSPSW-30-50% hybrid model exhibits a significant improvement in maximum strength (ranging from 4.42% to 13.80%) compared to the VCSPSW-30 model at b/h dimensional ratios between 0.5 and 1.5 Additionally, at a b/h ratio of 2.5 this model shows comparable strength to the FSPSW model, confirming the system’s desirable performance. Furthermore, the average ductility factor of the VDCFSPSW hybrid systems shows a marked superiority over flat shear walls, while its average response modification factor significantly outperforms single-layer corrugated shear walls, double-corrugated shear walls, and the hybrid HDCFSPSW systems, demonstrating the enhanced seismic performance of these hybrid systems.
Conclusion: The hybrid VDCFSPSW model outperforms various configurations by combining superior ductility, higher strength, and an improved response modification factor. Its efficient force redistribution and suitable inelastic behavior make it a highly effective and economical alternative to conventional steel shear walls

کلیدواژه‌ها English

Hybrid Steel Plate Shear Wall
Maximum Strength
Response Modification Factor
Ductility
Cyclic Loading
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دوره 20، شماره 53 - شماره پیاپی 54
در حال انجام
پاییز 1405
صفحه 24-47

  • تاریخ دریافت 15 بهمن 1404
  • تاریخ بازنگری 01 اردیبهشت 1405
  • تاریخ پذیرش 02 اردیبهشت 1405
  • تاریخ اولین انتشار 27 مرداد 1405
  • تاریخ انتشار 01 آبان 1405