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Predictive Dynamic Response of Panel Type Structures under Earthquakes.
Kollegger, J. P.; Bouwkamp, J. G.
National Science Foundation, Washington, DC., October 1980, 70 p.
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The potential coupling of translational and rotational motions of prefabricated panel systems under earthquake ground excitation is studied for several 12-story-high apartment buildings. Placement of apartments along the short end of these buildings and limiting the number of apartments along the long sides resulted in twelve different floor plans. The foundation flexibility was captured mathematically through introduction of a four-story-high 'dummy story'. Resonance and modal analyses were performed indicating considerable coupling of the longitudinal translational and torsional modal components. Under earthquake conditions both uncoupled and coupled translational and rotational motions were identified. The observed behavior was found to depend on both the degree of coupling of translational and rotational modal components of the buildings at the fundamental frequencies, as well as on the earthquake frequency response spectrum. A hypothesis regarding the anticipated behavior under earthquake excitation was developed and successfully tested against the analytical predicted structural response.
Dynamic response; Apartment buildings; Earthquake engineering; Earthquakes; Frequency response; Soil structure interactions; Foundations; Mathematical models; Panels; Dynamic structural analysis