Seismic Analysis of Structures

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Presentation transcript:

Seismic Analysis of Structures

Earthquake Loading lumped MDOF-sytem with rigid base translation (horizontal case) ground acc. From Clough, Penzien (3) hysteresis law

Reference peak-ground acceleration at Udine: 2.75 m/s2 Stahlbau Grundlagen – Einführung Prof. Dr.-Ing. Uwe E. Dorka Earthquake Engineering Prof. Dr.-Ing. Uwe E. Dorka Stand: 11.07.2006 3

Response Spectra viscously damped SDOF oscillator simplified response spectrum From Meskouris (5) From Petersen (2) solving this equation for various w and z, but only for one specific earthquake, the maximum absolute acceleration of this solution gives us the diagram above where: Eigenfrequency: Damping ratio:

Example: School building with steel frames or Hyde system Earthquake Engineering Prof. Dr.-Ing. Uwe E. Dorka Stand: 11.07.2006

Static Systems Frame Hyde System M2=12450Kg M1=16185Kg IPE 500 IPE 500 3.20 8.00m HEB 400 M1=16185Kg m IPE 500 3.20 8.00m HEB 200 HEB 200 m

Frame Hyde System Earthquake Engineering Prof. Dr.-Ing. Uwe E. Dorka Stand: 11.07.2006

Frame Hyde System Earthquake Engineering Prof. Dr.-Ing. Uwe E. Dorka Stand: 11.07.2006

Frame Earthquake Engineering Prof. Dr.-Ing. Uwe E. Dorka Stand: 11.07.2006

Frame details Earthquake Engineering Prof. Dr.-Ing. Uwe E. Dorka Stand: 11.07.2006

Hyde System Earthquake Engineering Prof. Dr.-Ing. Uwe E. Dorka Stand: 11.07.2006

Hyde System details Earthquake Engineering Prof. Dr.-Ing. Uwe E. Dorka Stand: 11.07.2006