The randomness of generated power by renewable energy resources has led experts in this field to provide sustained and permanent load supply with hybrid renewable energy systems (HRESs). This study investigates the modeling of an off‐grid HRES based on the wind turbine/photovoltaic/gas generator for supplying the consumption of a residential complex in Tehran (capital of Iran). To this end, the HOMER software has been implemented. After calculations, the capital cost and cost of energy of each component are estimated in different HRES models. In addition, parameters such as power generation, emissions, and thermo‐economic analysis of different models of the hybrid system have been investigated. Two models of optimum HRES (based on the lowest net present cost [NPC]), with and without wind turbines, were compared. According to the results, the fuel consumption and emissions caused by the operation of the gas generator will decrease by 53% as a result of using a wind turbine despite an 8% increase in NPC. This is an important achievement regarding high air pollution in Tehran. Based on the results, using a gas generator instead of a diesel generator leads to an 18% decrease in NPC. Additionally, in comparison to using a gas generator only, using the hybrid system leads to a 43% reduction in NPC.

Seismic response reduction of adjacent frames with the use of dampers, base isolations, or hybrid controls has been considered in recent years. What makes this to be highly important are the different properties of input earthquake loadings that can lead to different results. In this study, friction dampers and LRB isolators were used as the passive energy absorbers and, accordingly, the performance of such devices subjected to a wide range of earthquake loadings has been studied. Two experimental samples were considered to be used as model verifications. Afterward, the frames were excited by three sets of far-fault, near-fault, and near-fault with pulse records, and then the seismic responses of the frames were evaluated in the forms of displacement, inter-story drift, and acceleration. Subsequently, efficient techniques for implementing passive control devices were proposed. The results showed that the hybrid control strategy (a combination of devices) is the most efficient technique for all three statuses; however, using the base-isolation technique can also lead to acceptable performance. When the height of the frame increases, the role of the damper in the reduction of inter-story drift decreases. Nevertheless, the maximum displacement caused by near-fault with pulse records in the base isolation deceives is the main concern in using such devices. The rate of reduction of structural drift in near-fault with pulse records by using hybrid control was significant so that in 3-, 5-, and 8-story frames this reduction was 77%, 85%, and 87%, respectively.

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