News and Highlights
NEESR-SG: Self-Centering Damage-Free Seismic-Resistant Steel Frame Systems SC-MRF Hybrid Simulation for High-Level MCE
The RTMD facility will be performing a high level MCE hybrid simulation on November 7th, 2008, beginning at 11am, EDT.
Please visit the project webpage and the NEEScentral activities sites for more details.
The earthquake input for this simulation will produce the high-level maximum considered earthquake (i.e., MCE, with 2% probability of exceedance in 50 years) response. The input ground motion is the STM090 record from the 1994 Northridge event, scaled by 2.071. The high-level MCE simulation will cause minor yielding in the columns at the base of the first, second and third stories, yielding of the roof beams, a small reduction in the post-tensioning forces, and a small residual drift. The roof drift will be approximately 4.6% radians.
The 4-story, 2-bay self-centering (SC) moment-resisting frame (MRF) test structure is based on a prototype structure designed for a site in Van Nuys, California. The test structure has been subjected to numerous previous laboratory tests, including several median-level frequently occurring earthquake (i.e., FOE, with 50% probability of exceedance in 50 years) hybrid simulations, two low-level DBE hybrid simulations, one median-level DBE hybrid simulation, one high-level DBE hybrid simulation, one high-level DBE/median MCE hybrid simulation, one median-level MCE hybrid simulation, and one aftershock hybrid simulation. From these previous laboratory tests, the SC-MRF test structure has no significant residual drift, minor yielding in the columns at the base of the first story, and only a small reduction in post-tensioning forces from the DBE-level and aftershock simulations, as well as the minor damage identified above from the MCE-level simulation.
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