Study of using Effects of Viscous Dampers in the Distance of Expansion Joint between Two Concrete Frames with Different Insets

Document Type : Research Paper


Ph.D. Candidate, Department of Civil Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran


The distance between two buildings in urban areas is called expansion joint. The lack of this distance or lack of proper noticing about this distance makes the clash of two buildings when a terrible earthquake happens. In such cases, using viscous dampers are effective. Two 8-4floor frames with normal concrete moment system were chosen. The left-hand structure is usually modeled with two insets and the right – hand structure is modeled with 3, 4, 5 insets. Models were designed with existing regulations. Once, all models are modeled with expansion joint and next time with viscose dampers in the middle of expansion joint. Then non-linear dynamic analysis with seven accelerometers is achieved on all structures and acquired results from this analysis were compared with each other. Finally, it was cleared that the existing of dampers caused the reduction of answers like movement and drift of floors.


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