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| The Influence of Restoring Force Model With Post-Ultimate Negative Stiffness on Earthquake Collapse Response of RC Frame Structures |
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| DOI：10.7511/jslx19932031 |
| KeyWord:negative stiffness model ,earthquake collapse model,frame structure |
| Da Xiuli |
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| Abstract: |
| In this paper, the influence of post-ultimate negative stiffness stage on earthquake collapse response of reinforced concrete frame structures to a severe earthquake is studied. The earthquake collapse mechanism of structures is discussed,and an earthquake damage model is proposed,in which the degradation stiffness ratio is used as a damage parameter. Finally,the influences of the negative stiffness model on the behaviors such as strength, deformation and ductility of reinforced concrete frame structures under a strong earthquake are discussed through numercal simulation analysis in some examples. |
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