Research on the Estimation Method of the Stiffness Degeneration Index of Reinforced Concrete Members
Based on variable amplitude displacement cycle tests of 24 reinforced concrete members with different reinforcement conditions, the stiffness degradation index was proposed to describe the damage. The relationship between the stiffness degradation index, the displacement history, and the cumulative...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2020-01-01
|
| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/9464275 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850234682174603264 |
|---|---|
| author | Yukui Wang Zhefeng Liu Weijun Yang Jian Wang Xiao Zheng |
| author_facet | Yukui Wang Zhefeng Liu Weijun Yang Jian Wang Xiao Zheng |
| author_sort | Yukui Wang |
| collection | DOAJ |
| description | Based on variable amplitude displacement cycle tests of 24 reinforced concrete members with different reinforcement conditions, the stiffness degradation index was proposed to describe the damage. The relationship between the stiffness degradation index, the displacement history, and the cumulative energy dissipation was studied; on this basis, an estimation method for the stiffness degradation index was proposed. By comparing the experimental values and estimated values of the stiffness degradation index, the proposed method provides promising prediction reliability and accuracy. The stiffness degradation index has an effective relationship with the structural design parameters. Based on the stiffness degradation index, the reinforced concrete members can be divided into five performance levels: no damage (DK,k < 0), mild damage (0 < DK,k ≤ 0.3), moderate damage (0.3 < DK,k ≤ 0.7), severe damage (0.7 < DK,k ≤ 0.9), and destruction (0.9 < DK,k ≤ 1), which can provide a good reference for the seismic design of reinforced concrete members. The increase in the transverse reinforcement ratio can significantly reduce the stiffness damage, and the effect is more obvious under the conditions of small ductility. Under the same conditions, the smaller the ductility condition is, the smaller the stiffness damage of the reinforced concrete members will be. Therefore, the control of the ductility condition and the increase in the transverse reinforcement ratio are stable and effective methods for controlling the stiffness damage of reinforced concrete members. |
| format | Article |
| id | doaj-art-16dae8ae53d64329b33ab259aac51d53 |
| institution | OA Journals |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-16dae8ae53d64329b33ab259aac51d532025-08-20T02:02:33ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/94642759464275Research on the Estimation Method of the Stiffness Degeneration Index of Reinforced Concrete MembersYukui Wang0Zhefeng Liu1Weijun Yang2Jian Wang3Xiao Zheng4College of Civil Engineering, Changsha University of Science & Technology, Changsha 410004, ChinaCollege of Civil Engineering, Changsha University of Science & Technology, Changsha 410004, ChinaCollege of Civil Engineering, Changsha University of Science & Technology, Changsha 410004, ChinaCollege of Civil Engineering, Changsha University of Science & Technology, Changsha 410004, ChinaCollege of Civil Engineering, Changsha University of Science & Technology, Changsha 410004, ChinaBased on variable amplitude displacement cycle tests of 24 reinforced concrete members with different reinforcement conditions, the stiffness degradation index was proposed to describe the damage. The relationship between the stiffness degradation index, the displacement history, and the cumulative energy dissipation was studied; on this basis, an estimation method for the stiffness degradation index was proposed. By comparing the experimental values and estimated values of the stiffness degradation index, the proposed method provides promising prediction reliability and accuracy. The stiffness degradation index has an effective relationship with the structural design parameters. Based on the stiffness degradation index, the reinforced concrete members can be divided into five performance levels: no damage (DK,k < 0), mild damage (0 < DK,k ≤ 0.3), moderate damage (0.3 < DK,k ≤ 0.7), severe damage (0.7 < DK,k ≤ 0.9), and destruction (0.9 < DK,k ≤ 1), which can provide a good reference for the seismic design of reinforced concrete members. The increase in the transverse reinforcement ratio can significantly reduce the stiffness damage, and the effect is more obvious under the conditions of small ductility. Under the same conditions, the smaller the ductility condition is, the smaller the stiffness damage of the reinforced concrete members will be. Therefore, the control of the ductility condition and the increase in the transverse reinforcement ratio are stable and effective methods for controlling the stiffness damage of reinforced concrete members.http://dx.doi.org/10.1155/2020/9464275 |
| spellingShingle | Yukui Wang Zhefeng Liu Weijun Yang Jian Wang Xiao Zheng Research on the Estimation Method of the Stiffness Degeneration Index of Reinforced Concrete Members Advances in Civil Engineering |
| title | Research on the Estimation Method of the Stiffness Degeneration Index of Reinforced Concrete Members |
| title_full | Research on the Estimation Method of the Stiffness Degeneration Index of Reinforced Concrete Members |
| title_fullStr | Research on the Estimation Method of the Stiffness Degeneration Index of Reinforced Concrete Members |
| title_full_unstemmed | Research on the Estimation Method of the Stiffness Degeneration Index of Reinforced Concrete Members |
| title_short | Research on the Estimation Method of the Stiffness Degeneration Index of Reinforced Concrete Members |
| title_sort | research on the estimation method of the stiffness degeneration index of reinforced concrete members |
| url | http://dx.doi.org/10.1155/2020/9464275 |
| work_keys_str_mv | AT yukuiwang researchontheestimationmethodofthestiffnessdegenerationindexofreinforcedconcretemembers AT zhefengliu researchontheestimationmethodofthestiffnessdegenerationindexofreinforcedconcretemembers AT weijunyang researchontheestimationmethodofthestiffnessdegenerationindexofreinforcedconcretemembers AT jianwang researchontheestimationmethodofthestiffnessdegenerationindexofreinforcedconcretemembers AT xiaozheng researchontheestimationmethodofthestiffnessdegenerationindexofreinforcedconcretemembers |