Browsing by Author "Amaddeo, C."

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Drift Design Approach for Steel Tall Buildings According To Eurocode 3
(Crc Press-Taylor & Francis Group, 2017) Amaddeo, C.; Taskin, K.; Orhan, T.
This paper presents the analysis of a 27-story steel frame tall building under seismic loads according to Eurocode 3. The selected building is located in Izmir, Turkey, that is a high seismic region. To understand this behavior under earthquake loads, a Finite Element Model of the building is created using SAP2000. The structural system is composed of steel frame with concentric bracing system to control the horizontal displacement under earthquake loads. The results from two different bracing configurations are presented, in particular X-braced and K-braced frames, and they are used in order to understand which solution is more effective in reducing the inter-story drift displacement. A non-linear time history analysis is performed to evaluate the inter-story drift considering a spectrum compatible earthquake with a return period of 150 years.
Citation - WoS: 1
Citation - Scopus: 1
System Identification of a Base-Isolated Bridge by Ambient and Forced Vibration Tests
(Amer Soc Testing Materials, 2017) Ozcelik, O.; Amaddeo, C.
Sciarapotamo Bridge, located in Reggio Calabria Province, Italy, has been recently retrofitted by replacing its deteriorated concrete bridge deck with a composite steel-concrete deck, and isolating the new deck with eight high damping rubber, and four multidirectional sliding bearings. Full-scale ambient and forced vibration dynamic commissioning tests were performed on the bridge just before the bridge has become operational. Three different output-only system identification methods with ambient vibration measurements were used for modal parameter identification, namely: (1) multiple reference natural excitation technique in conjunction with eigen-system realization algorithm, (2) enhanced frequency domain decomposition, and (3) data driven stochastic subspace identification methods. Modal parameter estimation results using different output-only identification methods were presented and compared within the paper. In addition, relatively higher level forced vibration test data was used for estimating frequency response functions, identifying isolated natural frequencies, and damping ratios of the retrofitted bridge in as-built condition. Estimated damping coefficients under different excitation levels are of great value, showing the total damping in the system at low level ambient and relatively higher level forced vibration tests. Experimentally obtained modal parameters of the bridge set the undamaged benchmark state of the bridge for future potential condition assessment studies.