Abstract
This study discusses the effect of metallic yielding dampers (ADAS) on the behavior of reinforcement concrete buildings when exposed to seismic shocks. The objective of the study is to reduce the negative impacts on the main structural elements (plastic, fall) by using the technique of metallic dampers. The method of metallic dampers is one of the modern ways based on the principle of dissipating the resulting energy from the seismic shock and reducing the needed energy in the main structural elements of the building to keep it in a flexible state. This technique also provides a controlling mechanism for story displacement, the handling of the soft story mechanic and the torsion mechanic of the buildings. In this study, the effect of the addition of ADAS dampers on the construction behavior was observed in terms of (building period, base shear, roof displacement, roof acceleration, story displacement, dissipative energy). Based on the preceding, this study will give the possibility of predicting the behavior of the building when using ADAS metal dampers in the reinforced concrete structures with their distribution methods.
Highlights
The design theory of seismic resistance depends on the resistance of seismic side loads due to the stiffness and resistance of structural elements caused by the weak and medium earthquakes, reliance is placed on the lateral displacement control, avoiding the collapse of structural elements through the ductility of components and the dissipation of energy caused by strong earthquake.The core approach to energy dissipation in construction is to allow for local damage to structural elements in the basic elements that are resistant to side loads
2- Research objective: The objective of this study is to study the effect of the probability distribution of ADAS damping devices in reinforced concrete buildings under the influence of the analysis of time history on the building's response to seismic shock
7-3 Comparison of the building period: In the following Charts, we can clearly see the decreasing in the period of the building in a different ratio between the models of probability distribution than the case of the frame model before the addition of dampers is shown in the following Charts: 8.95% in M1 and 8.27% in M2 and 1.31% in M3 and 4.56% In M4 and 2.651% in the M5 model, from which we found that the M1 and M4 distribution status was the case that showed to the highest rates of reduction in the building period, as shown in Fig. (13)
Summary
The core approach to energy dissipation in construction is to allow for local damage to structural elements (i.e. plastic joints) in the basic elements that are resistant to side loads. These elements require replacement or repair after the earthquake occurs to restore its side strength, stiffness and energy dissipation capacity. Several theories have been developed to evolve some innovative techniques to improve the performance of elements exposed to an earthquake by minimizing damage to side-loading components These techniques include adding additional devices to the structural structure to absorb and dissipate the energy of the seismic shock. The ADAS (Added damping and added stiffness) in all its forms is the focus of this research
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