Abstract
This study proposes a novel mild steel damper with non-uniform vertical slits. The influence of different shapes of vertical slits of the core energy plate on the energy dissipation and buckling resistance capacities is analyzed. Based on the theoretical analysis, formulas of key parameters of the dampers, including the elastic lateral stiffness, shear bearing capacity and yield displacement, are derived. The effectiveness of the proposed damper is demonstrated through pseudo static tests on four 0.25-scale specimens. Performance of these dampers, i.e. cyclic deformation, stress distribution, energy dissipation capacity, etc., are presented and discussed. Using the numerical models of dampers calibrated through test data, earthquake time-history analyses were conducted, and it is observed that the dampers significantly reduce the seismic responses of the prototype frame and have a desirable energy dissipation capacity.
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Supported by: Natural Science Foundation of China under Grant No. 51278104
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Zheng, J., Li, A. & Guo, T. Analytical and experimental study on mild steel dampers with non-uniform vertical slits. Earthq. Eng. Eng. Vib. 14, 111–123 (2015). https://doi.org/10.1007/s11803-015-0010-9
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DOI: https://doi.org/10.1007/s11803-015-0010-9