مروری جامع بر فناوری‌های پیشرفته مقاوم‌سازی ستون‌های بتن مسلح فاقد محصورشدگی جانبی
محورهای موضوعی : آنالیز سازه - زلزله
محمدرضا شکرزاده
1
,
مهدی شریفی
2
,
امیر جعفری
3
,
محمد عیسی محمد دوست
4
,
محمد حسام طاهری
5
1 - گروه عمران دانشگاه آزاد اسلامی واحد علوم وتحقیقات تهران
2 - استادیار گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه قم، قم، ایران
3 - گروه مهندسی عمران، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران
4 - گروه مهندسی عمران، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران،
5 - گروه مهندسی عمران، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران
کلید واژه: محصورشدگی فعال, محصورشدگی غیرفعال, الیاف پلیمری تقویت‌شده, آلیاژهای حافظه‌دار,
چکیده مقاله :
این مقاله به مروری جامع بر فناوری‌های پیشرفته مقاوم‌سازی ستون‌های بتن مسلح فاقد محصورشدگی جانبی می‌پردازد. هدف اصلی، بررسی و تحلیل روش‌های نوین مقاوم‌سازی مطرح‌شده در ادبیات فنی، ارزیابی عملکرد آن‌ها و تبیین مزایا، محدودیت‌ها و کاربردهای هریک از روش‌ها است. در ابتدا، اصول و ویژگی‌های دو رویکرد اصلی محصورشدگی فعال و غیرفعال مورد بررسی قرار گرفته و در ادامه، روش‌های مرسوم تقویت با الیاف پلیمری تقویت‌شده (FRP)، روش نزدیک به سطح (NSM) و همچنین استفاده از آلیاژهای حافظه‌دار (SMA) تشریح شده‌اند. مقاله با تمرکز بر روش‌های ترکیبی و ارائه تحلیل تطبیقی از منظر عملکرد لرزه‌ای، شکل‌پذیری، ظرفیت باربری و دوام، چارچوبی کاربردی برای انتخاب مناسب‌ترین راهکار مقاوم‌سازی ارائه می‌دهد. یافته‌های این مرور می‌تواند مبنای تصمیم‌گیری مهندسان سازه در پروژه‌های مقاوم‌سازی باشد.
This paper provides a comprehensive review of advanced retrofitting technologies for reinforced concrete columns lacking lateral confinement. The primary goal is to review and analyze novel retrofitting methods presented in technical literature, evaluating their performance and outlining the advantages, limitations, and practical applications of each method. Initially, the fundamental principles and characteristics of the two main confinement approaches—active and passive—are discussed. Subsequently, conventional strengthening methods, including Fiber-Reinforced Polymer (FRP), Near-Surface Mounted (NSM) techniques, and the use of Shape Memory Alloys (SMA), are described in detail. By emphasizing hybrid approaches and presenting a comparative analysis from the perspectives of seismic performance, ductility, load-bearing capacity, and durability, this paper provides a practical framework for selecting the most suitable retrofitting strategy. The findings of this review could serve as a foundation for structural engineers’ decision-making processes in retrofitting projects.
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