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| Analysis and empirical study of mechanical properties of RC frames with seismic damage based on damage distribution model |
| Received:June 05, 2022 Revised:September 20, 2022 |
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| DOI：10.7511/jslx20220605001 |
| KeyWord:damage distribution seismic loss frame finite element simulation residual performanc |
| Author | Institution |
| 胡卫兵 |
西安建筑科技大学 土木工程学院, 西安 ;西安建筑科技大学 结构工程与抗震教育部重点实验室, 西安 |
| 汪胜 |
西安建筑科技大学 土木工程学院, 西安 |
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| Abstract: |
| Residual load-displacement response analysis of seismically damaged structures is important as a basis for accurate assessment of the residual performance of post-earthquake reinforced concrete (RC) frame structures.However,the inhomogeneous distribution of damage in the seismically damaged structure poses difficulties for the quantitative analysis of its load-displacement response.In this study,a numerical model of seismic damaged RC frame that can take into account the inhomogeneous distribution of a seismic damage is proposed based on the fiber beam-column model.The damage distribution is quantified based on the damage phenomena of the seismically damaged RC frame,and the distribution of damage along the column height and section depth is considered.Based on the quantitative results,the constitutive relationships of damage of the fibers at different locations in each fiber beam-column unit of the RC frame are determined separately,and the remaining load-displacement response is quantitatively analyzed based on these.Finally,test of an one-bay,three-story,four-span RC frame is used as a numerical example to validate the model.The results show that the proposed model can simulate the residual load-displacement response of the RC frame with the maximum residual load capacity,stiffness,yield strength and other indexes more accurately,with errors below than 10%,so the proposed model can provide a new tool for the evaluation of post-earthquake RC structures. |
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