Evaluating the seismic performance of steel-sma hybrid Bracing structures

Subject Areas : Analysis of Structure and Earthquake

mohammad hooshmand ¹ , behzad rafezi ² , jafar khalileAlafi ³

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Received: 2015-05-18 Accepted : 2015-12-22 Published : 2016-02-09

Keywords: Nonlinear Dynamic Analysis, shape memory alloy (SMA), Finite Element Modeling, Keywords: Hybrid brace, seismic performance,

Abstract :

In this study the seismic performance of hybrid braces composed of steel and shaped- memory alloys (SMA). is investigated Six types of hybrid braces were used, constituted by SMA content of 0, 20, 40, 60, 80, and 100%. A nonlinear dynamic analysis was performed under El Centro earthquake records, with the maximum acceleration of 0.6g and 0.9g. Our results showed that the seismic performance, i.e., the amount of energy absorption and residual strain, of steel–SMA hybrid braces depends on the SMA content. The optimal value of SMA content was 20%, as, at this concentration, a hybrid brace can be designed with good seismic performance at a justifiable fabrication cost.