Finite Element Modeling of SMA-Confined Concrete: Influence of Winding Pitch and Temperature on Strength and Energy Dissipation

  • سال انتشار: 1405
  • محل انتشار: Journal of Civil Engineering and Applied Solutions، دوره: 2، شماره: 1
  • کد COI اختصاصی: JR_CEAS-2-1_004
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 12
دانلود فایل این مقاله

نویسندگان

Mehdi Ghassemieh

School of Civil Engineering, College of Engineering, University of Tehran

Moein Rezapour

School of Civil Engineering, College of Engineering, University of Tehran

چکیده

This study presents a detailed finite element investigation of concrete cylinders confined with shape memory alloy (SMA) windings, focusing on the combined effects of winding pitch and temperature. The main objective is to evaluate how geometric configuration and thermal activation influence the compressive strength, ductility, and energy dissipation of confined concrete. The nonlinear response was modeled in ABAQUS using the Concrete Damaged Plasticity (CDP) framework for the concrete core and a user-defined FORTRAN subroutine to simulate the reversible austenite–martensite transformation of the SMA. The numerical model was validated against laboratory data, showing strong agreement between simulated and experimental stress–strain curves. Parametric analyses were performed for winding pitches of ۵.۳, ۹, and ۱۶ mm under temperatures of ۳۰, ۵۰, ۷۰, and ۹۰ °C. The results demonstrate that decreasing the winding pitch substantially enhances post-peak stability and energy absorption, while higher SMA temperatures improve confinement efficiency at large strains without significantly altering peak strength. The study confirms that tighter and thermally activated SMA windings provide more uniform stress distribution and superior energy dissipation. These findings highlight the potential of SMA-based active confinement as a reliable and adaptive strategy for seismic retrofitting and impact-resistant design of concrete structures.

کلیدواژه ها

Shape memory alloy, Concrete confinement, Finite element modeling, Energy Dissipation

اطلاعات بیشتر در مورد COI

COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.

کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.