![]() ![]() In the third section, the characteristics of the structural modeling as well as the friction isolator used at the base are also examined. In the second section of this paper, the analytical restoring stiffness formulas for this wire rope isolator are presented. The main objective of this study was to identify the mechanical properties of the wire rope isolators in three levels of drifts which are: small drift, relatively large drift, large drift limited to allow the use of this seismic isolation system for lightweight structures. in 2017 examined the behavior of seismic wire rope isolators for lightweight isolated structures at the base. The analytical model for static stiffness in the perpendicular direction was investigated by Castellano’s second theory. ![]() studied the vertical static stiffness of the wire rope isolators in 2016. In their study, vibration and shock were used various techniques to predict their harmful effects on equipment and structures. studied the wire rope isolators for vibration isolated from equipment and structures in 2015. Then, the seismic demand capacity of the structures under the effects of earthquake excitations from slight to extreme should not exceed the capacities corresponding to different performance levels of operation.īalaji et al. In seismic design, structures are characterized by the capacity of the structure under different levels of the earthquake. In this paper, a new application for wire rope systems in combination with friction isolator systems has been examined and analyzed. In addition to its cost-effectiveness, it is flexible in three directions, and is involved in large displacement due to the spiral layout of the cables. #WIRE ROPE ISOLATOR SERIES#The wire rope isolators are made up of a set of series of tensile metal stainless steel wire ropes that are kept in the form of a spiral or between the two metals. Keywords: incremental dynamic analysis (IDA), friction isolator, wire rope isolator. The fragility curves of the structures have been presented for different performance levels. In the IDA, spectral acceleration at the first-mode period of vibration with 5 percent damping (Sa( T 1, 5 %)) has been used as an Intensity Measure (IM), which has the less dispersion for far-fault records. ![]() Incremental Dynamic Analysis (IDA) is used to evaluate the seismic capacity demand of steel moment frames. The aim of this study is to examine the effect of wire rope isolators by combining friction isolators in steel structures, as well as to obtain the seismic response of isolated structures at base, and to investigate the effect of this isolator on the seismic response based on the nonlinear time history analysis which is the method of our research. In this paper, cable isolators with applications in the field of vibration and shocks imported into steel structures and isolated equipment are investigated. ![]()
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