Seismic performance of MR frames protected by viscous or hysteretic dampers
Structural Design of Tall and Special Buildings, ISSN: 1541-7808, Vol: 24, Issue: 9, Page: 653-671
2015
- 29Citations
- 17Captures
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Article Description
Summary This study concerns the behaviour of steel frames protected by different anti-seismic devices (dampers). Typical hysteretic and viscous dampers are arranged in three steel moment-resisting frames (MRFs) having different dynamical features but are designed to accomplish determined performance objectives. The proposed devices are selected following an iterative procedure based on the use of a suitable damage functional, which has been applied to control the behaviour of the protected structures under a specific seismic record. The outcomes obtained by implementing incremental dynamic analyses, carried out on the basis of seven historical records characterized by different features, allow to analyse the improvement of the structural performance due to the considered dampers and, therefore, to provide design information about their employment. The comparison of results is carried out taking into account the dampers capacity to protect the structures from damage, the inter-storey drifts, the residual deformations and the possible amplification effects. In conclusion, the equivalent behaviour factors for each damper type are given, with the aim of providing useful design parameters for the implementation of simplified conventional linear analyses.
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