Development of Loading Protocols for Quasi-Static Testing
Despite the abundance of large-scale laboratory testing to assess the seismic performance of components and systems, there is a lack of consistency in the testing protocols being used, which creates challenges when comparing test results across experimental programs. A lack of consensus is evident in existing recommendations for uni-directional testing protocols, while guidance on bidirectional protocols is limited. In an effort to address these shortcomings, specific recommendations for loading protocols are being developed for structural components, with the first phase of this study focused on the development of uni-directional testing protocols. To accomplish this objective, a suite of ground motions, scaled to the New Zealand code spectra for Wellington (an urban center located in a region of high seismicity), were used to conduct nonlinear response history analyses for a suite of single degree of freedom (SDOF) systems that comprised a range of ductility factors and structural periods. Using these results, statistical distributions of cumulative damage parameters are being used to develop loading protocol recommendations. Much of the approach outlined in this poster follows the methodology used by Mergos and Beyer (2014) to develop loading protocols suitable for regions of lower seismicity than that considered here.
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