Evaluation of Different Approaches to Estimate Seismic Input Energy and Top Displacement Demand of Moment Resisting Frames

Küçük Resim Yok

Tarih

2021

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

Springer Science and Business Media Deutschland GmbH

Erişim Hakkı

info:eu-repo/semantics/closedAccess

Özet

Energy-based seismic design (EBSD) has many advantages over the conventional design approaches (force- and displacement-based) provided by the current seismic design codes since it accounts for duration, frequency content and pulse-type of the ground motion. Cumulative damage potential of the earthquake excitation is also taken into consideration by this approach. In order to obtain a satisfactory design, energy capacity of a structure should exceed the energy demand from an earthquake in EBSD. The structural damage indicators like inelastic top displacement demand (?top) of MDOF system, which can be used as a crucial input data for general nonlinear static analysis procedures, are claimed to be accurately predicted using the input energy. Primarily, seismic input energy per unit mass (EI/m) imparted into a MDOF frame system during an earthquake is determined by only using modal properties of the system and input energy time series of earthquake ground motion on its equivalent SDOF systems. Using the determined seismic input energy per unit mass, ?top is predicted by literature equations. Effects of spectral matching on the success of seismic input energy and inelastic displacement demand estimations were also investigated. Evaluation of the predictions of ?top was achieved by comparing with the results of nonlinear time history analyses (NLTHA) on two distinct three-story moment resisting frames. It was observed that the relative differences between analyses results and the predicted values were calculated as 18% (input energy prediction) and 30% (top displacement prediction) for the original records whereas they were 12 and 20% for the spectrally matched ground motions. © 2021, The Author(s), under exclusive license to Springer Nature Switzerland AG.

Açıklama

1st International Workshop on Energy-Based Seismic Engineering, IWEBSE 2021 -- 24 May 2021 through 26 May 2021 -- -- 258499

Anahtar Kelimeler

Energy balance equations, Energy-based seismic design, Inelastic top displacement demand, Seismic input energy, Forecasting, Seismic design, Static analysis, Steel beams and girders, Structural frames, Displacement prediction, Earthquake ground motions, Energy-based seismic design, Equivalent SDOF systems, Force and displacements, Moment resisting frames, Non-linear static analysis, Nonlinear time history analysis, Earthquakes

Kaynak

Lecture Notes in Civil Engineering

WoS Q Değeri

Scopus Q Değeri

Q4

Cilt

155 LNCE

Sayı

Künye