Seismic Performance Analysis of Bottom-Storey Self-Centering Frame Structure
A three-dimensional finite element model is established for both a multi-storey conventional frame structure and a bottom-storey self-centering frame structure in an area designed for an 8-intensity seismic fortification(0.2g),modelled using the finite element software ABAQUS.Four ground motion records are selected and amplified to the peak accelerations of 0.07g and 0.4g,respectively,to conduct elastic-plastic time history analysis.The dynamic responses and damage patterns of the two structures under seismic actions are compared.Numerical simulation results indicate that the inter-storey drift ratio of the self-centering frame structure is similar to those of the conventional frame structure and is within the specified limits in the standard.Under severe seismic loads,the damage is mainly propagated on the beam ends of the bottom two storeys.The damage to the column bases of the bottom-storey self-centering structure is lighter than that of the conventional frame structure.The residual displacement of the self-centering frame structure is much smaller than that of the conventional frame structure.
bottom-storey self-centering frame structureABAQUSelastic-plastic time history analysisseismic performance
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