نوع مقاله : پژوهشی
نویسندگان
دانشکده مهندسی عمران - دانشگاه فردوسی مشهد
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Every building needs a system that resists the horizontal demands from lateral forces such as wind and earthquakes. Such systems are commonly known as Lateral Force Resisting (LFR) Systems. The steel slit shear wall is a new LFR system intended for zones of high seismicity. The essential component of the steel slit shear wall system is the slit. The shear wall has columns of slits forming links in between them. In the presence of lateral forces, these links work as a series of small flexural members in parallel and behave in double curvature reaching yield at both ends. The most notable advantages of such a system are its ductile behavior and high ability to dissipate energy. In addition, the system is very versatile in terms of placement. Furthermore, the dimensions of the system are convenient and the openings -required to install windows and doors can be easily accommodated. In the event of an earthquake, all damaged panels can be easily removed and replaced by new ones. The steel slit shear walls are entirely fabricated at factory. and then fully bolted at construction site. Thus, costly field welds are not necessary for installation of the system, which can be significantly functional in design and retrofit of structures.In this paper, numerical analysis using Abaqus is performed to evaluate the effect of slit shape and edge stiffener on behavior of steel slit shear wall. In order to verify the efficiency and accuracy of the employed finite-element method, Cortes and Liu tests are conducted. Then, three steel shear wall models with different slit shapes and three steel shear wall models with different edge stiffeners are established. The hysteresis curves, energy dissipation capacity, failure mode, out-of-plane deformation, and ductility of the shear wall models are compared and analyzed. The numerical results show that the proposed slit shapes models decrease the stiffness and improve the strength,
ductility, and energy dissipation capacity. Furthermore, although the literature shows that the width of edge stiffener has negligible effects on the stiffness and strength of steel slit shear wall, this paper shows that the edge stiffener type significantly improves the stiffness, strength, and energy dissipation capacity.
کلیدواژهها [English]
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