The Research on Hysteretic Energy in the Equivalent System Schemes between Multi Degree of Freedom System and Single Degree of Freedom System

Abstract:

The cumulative damage produced by severe earthquake is significant to the structural dilapidation and collapse. Most design methods based on force or displacement can’t reflect the effect of cumulative damage. Energy-based seismic design is known as a good alternative design. At present the research on the hysteretic energy of single-degree of freedom system(SDOF) is abundant, but real buildings can only be simplified as multi-degree of freedom systems(MDOF) mostly. Therefore how to acquire suitable equivalent single-degree of freedom system(ESDOF) is a key program. In this paper 12 equivalent system schemes(ESS) have been put forward, then the ratio of hysteretic energy(R_H) of 6-floors framework was calculated with 30 typical seismic waves. Based on the comparison and analysis between calculations of 3 typical ESS, by the way of envelope fitting, the expression of R_H related to earthquake characteristic value a/v was established.

• Periodical: Applied Mechanics and Materials (Volumes 166-169)
• Pages: 2177-2181
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.166-169.2177
• Online since: May 2012
• Authors: Ming Qiang Sheng, Ying Liu
• Keywords: Earthquake Characteristic Value, Energy Design, Equivalent System Scheme, Ratio of Hysteretic Energy

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