Postdoctoral Appreciation Week Poster Presentations 2023
Permanent URI for this collectionhttps://hdl.handle.net/20.500.12588/2079
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Browsing Postdoctoral Appreciation Week Poster Presentations 2023 by Author "Ghannoum, Wassim"
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Item Design Requirements for Mechanically Spliced High-Strength Reinforcing Bars in Hinge Regions(2023-09-22) Abdullah, Wyra; Ghannoum, WassimThe application of mechanically spliced HSRBs is restricted in the hinge region of the concrete shear walls due to the absence of experimental validation. For this reason, this paper comprises testing of four full-scale shear walls. The control wall features HSRBs exclusively at the hinge region, while the remaining walls incorporate couplers of varying lengths, ranging from 3 inches to 14 inches, at their respective hinge regions. The walls will be tested under cyclic loading tests to assess the structural response, deformability, energy dissipation capacity, and failure modes. The walls are 16 feet high, 7 feet long, and 16 inches thick. The walls have a foundation to support and a top beam as a point of the application of loads. The walls will be tested under cyclic load using two 220 kip actuator on a reaction wall. The results of the experimental programm will be used to establish a guideline that covers aspects such as coupler type, concrete cover requirements, detailing at spliced regions, and anchorage lengths to ensure robust performance and compatibility with existing design codes and standards.Item Quantifying the Effects of Seismic Loading History on the Collapse Behavior of Concrete Columns(2023-09-22) Khedmatgozar Dolati, Seyed Sasan; Matamoros, Adolfo; Ghannoum, WassimThe current assessment methods to retrofit vulnerable concrete buildings in the US [ASCE 41-17, ACI 369.1-19] produce relatively conservative deformation capacities at the loss of lateral and axial strengths. Such conservatism hinders region-wide efforts to retrofit deficient buildings due to high costs. To improve the accuracy and reliability of structural assessment, continuum finite element models were calibrated to experimental tests for over twenty columns. Calibrated column models were then subjected to a series of loading protocols, including monotonic pushover and non-symmetric ratcheting protocols. The effects of the lateral loading protocols on damage progression, strength, and deformation capacities are discussed in these columns.