Seismic Energy Response Analysis of Reinforced Concrete Moment Resisting Frame Structures

摘要

The authors report a detailed case study of energy response on three dimensional (3D) Reinforced Concrete (RC) moment resisting frame (MRF) structures for hysteretic energy distribution rule. An RC MRF structure was adequately aseismatic designed, based on which three additional various stiffness distributed models were conceived. With 3D translational earthquake records input, nonlinear dynamic analysis was carried out on them. It was revealed that for 3D RC MRF structures, seismic hysteretic energy's vertical distribution was different from assumptions as revealed in literature. When the structure has the same vertical stiffness distribution change to obvious descending stiffness distribution from top, the hysteretic energy distribution rule was proposed that for beam it will change from lognormal type to parabolic type, and "steep reduction" to "mitigatory reduction" for column. Therefore, for different type of element, especially column, the amount of seismic energy it dissipated may thoroughly different from what it was supposed. Designers and researchers must be aware of this.