International Journal of Earthquake and Impact Engineering
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International Journal of Earthquake and Impact Engineering (2 papers in press)
New Approach in Simulation of Soil-Structure Interaction (SSI) Problems Including Damper Effects by Kemal Edip, Aleksandra Bogdanovic, Marta Stojmanovska, Angela Poposka, Ehsan Noroozinejad Farsangi Abstract: In this paper, numerical simulation of the issues related to soil-structure interaction (SSI) in the structures equipped with prestressed damping device (PDD) is presented. More specifically, this research examines the impacts of dampers on the interaction between the soil and the structure, considering a variety of conditions, including the effects of the soil boundaries simulated by infinite elements. Comparative analysis of the results with different disposition of the dampers is made using ANSYS nonlinear platform. It could be observed from the results of the numerical analysis that regarding the impact of dampers in the structure on SSI, the selection of the damper type has a significant role. Keywords: Soil-Structure Interaction; Seismic Excitations; Prestressed Damping Device (PDD); Boundary Conditions; Infinite Element.
The Response of Tall Buildings to Far-Field Earthquakes and the Case of a 49-Story Steel Building by Sifat Muin, ABOLHASSAN ASTANEH-ASL, C.E.M. TOPKAYA Abstract: This paper investigates the seismic response of an instrumented 49-story steel structure in San Francisco to weak, far-field, and strong, near-field ground motions. The instrumentation records obtained during the 1989 Loma Prieta earthquake are used to verify the accuracy of the predictions of the time-history analysis of the model. The Chi-Chi-002 ground-motion record from the 1992 Chi-Chi earthquake in Taiwan, (PGA=0.08g) representing a weak, far-field earthquake and the record from the 1994 Northridge Newhall earthquake (PGA=0.60g) representing a strong, near-field earthquake were used in the study. The results showed that the force, acceleration, and displacement responses of this long-period structure to the weak far-field ground motion is much larger than its response to the strong, near-field ground motion. Also, the response attenuates at a slower rate for the weak, far-field earthquake, indicating the possibility of greater damage, both to structural and non-structural elements, during the earthquake. Interim seismic design recommendations are formulated to address this issue in the design of tall buildings with long periods. Keywords: structural engineering; earthquake engineering; the design of steel structures; nonlinear time-history analysis; seismic design; tall buildings; instrumented buildings; far-field earthquakes; near-field earthquakes; dynamic resonance; long-period motion; seismic performance; drift control; seismic response.