A Single Mode Energy-Based Pushover Procedure

Abstract eng:
In this paper a new energy-based pushover procedure is presented in order to achieve an approximate estimation of structural performance under strong earthquakes. The steps of the proposed methodology are quite similar to those of the well-known displacement modification method. However, the determination of the characteristics of the equivalent single degree of freedom (E-SDOF) system is based on a different concept. Its main idea is to determine the E-SDOF system by equating the external work of the lateral loads acting on the multi degree of freedom (MDOF) system under consideration to the strain energy of the ESDOF system. After a brief outline of the theoretical background, the sequence of the steps needed for the implementation of the proposed methodology along with the necessary equations are systematically presented. Finally, the accuracy of the proposed method is evaluated by an extensive parametric study which shows that, in general, it provides better results compared to those produced by other similar procedures.

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