Mitigation of Seismic Risks to Soft-storey Structures using Toggle-brace-damper Systems
Soft-storey mechanism is characterized by a sudden reduction of lateral stiffness in one or more levels of a structure.Soft-storey is often observed in the ground level due to the absence of wall or cladding.With recent develop of energy dissipation systems,soft-storey mechanism can be corrected by addition of a damper-brace assembly.In particular,this paper investigates the effect of toggle-damper-brace systems on such situations.Governing equations including the magnification factor and lateral stiffness contributed by a toggle-damper-brace are formulated.It was found that a toggle-damper-brace system,if proportioned correctly,will significantly increase the travel in the damper and overall stiffness of structure can be enhanced.An illustrative example is presented using nonlinear time history analysis implemented on MATLAB.
earthquake soft-storey, toggle passive energy dissipation
Ricky WK Chan Zhefei Zhao
School of Civil, Environmental and Chemical Engineering, RMIT University, GPO Box 2476,Melbourne VIC 3000 Australia
国际会议
郑州
英文
833-837
2012-09-22（万方平台首次上网日期，不代表论文的发表时间）