نوع مقاله : پژوهشی
دانشکده مهندسی عمران و محیط زیست، دانشگاه تربیت مدرس
عنوان مقاله [English]
Yet, the main aim of most of the seismic design codes is to design a building to ensure life safety during a design level earthquake, and hope that the performance of the building under different levels of seismic excitation would be acceptable. However, experiences exhibit that most of structures in severe earthquakes receive damages and residual displacements which prevent
serviceability and, in some cases, impose repair costs higher than new construction investments. In addition, the damage resulted from earthquakes has been unacceptable to building owners due to the cost of structural and non-structural repairs. One of the methods to reduce the cost of repair and maintenance is to utilize a structural self-centering system that provides considerable energy dissipating capability, limits the lateral displacement, and reduces probable damages that the structure can experience. On the other hand, the seismic design of self-centering system exhibits excellent performance regarding the energy dissipation enhancement, reducing damages and minimizing the residual displacements. The use of ``hybrid'' precast reinforced concrete wall structures for high seismic regions provides ample rocking mode of behavior and reduces the residual lateral displacements. In this system, by allowing the wall to rock at its base, the peak structural forces are limited without structural damage. Post-tensioning and energy dissipation are used to ensure stability and limit displacements. In this paper, three tested wall specimens, containing two precast reinforced concrete hybrid shear walls and one emulative precast reinforced concrete shear wall, were simulated and modeled with ample precision regarding their details in ABAQUS software, and then were numerically analyzed under both gravity and monotonic lateral loading to investigate their seismic nonlinear behavior. The obtained results indicate that the self-centered RC walls are favorite systems in high seismic-prone areas, and the nonlinear numerical results of tested specimens mutually correlate to the experimental results.