Residual punching shear capacity of corroded reinforced concrete slabs
Steel reinforcement corrosion is becoming a critical issue since more old buildings are still in operations with great probability of substantial corrosion in reinforcements. The strength and serviceability of corroded RC slab is remarkably impacted by the corrosion. Therefore, it is vital to unders...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/161786 |
| _version_ | 1826118802529583104 |
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| author | Yang, Zhihong Zhang, Xinchen Li, Bing |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Yang, Zhihong Zhang, Xinchen Li, Bing |
| author_sort | Yang, Zhihong |
| collection | NTU |
| description | Steel reinforcement corrosion is becoming a critical issue since more old buildings are still in operations with great probability of substantial corrosion in reinforcements. The strength and serviceability of corroded RC slab is remarkably impacted by the corrosion. Therefore, it is vital to understand more about the punching shear mechanism of the slabs subjected to corrosion effects in order to make a good prediction on its residual capacity. In this paper, critical shear crack theory (CSCT) was further developed to predict the residual punching shear strength of corroded RC slabs, considering the material properties deterioration induced by the corrosion. The effectiveness of modified CSCT was verified by comparing with the available experimental results. In addition, a validated FEM model that considers the material deterioration and bond degradation was proposed to verify the accuracy of proposed model. Finally, a parametric study, including 240 cases, was conducted to investigate the effect of some important factors on punching shear behavior of corroded RC slabs based on modified CSCT. The outcomes demonstrated that the residual punching shear capacity predicted by the proposed model is more accurate than existing design codes. The predicted failure modes had also shown fairly good agreement with the experimental results. |
| first_indexed | 2024-10-01T04:49:27Z |
| format | Journal Article |
| id | ntu-10356/161786 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:49:27Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1617862022-09-20T03:00:31Z Residual punching shear capacity of corroded reinforced concrete slabs Yang, Zhihong Zhang, Xinchen Li, Bing School of Civil and Environmental Engineering Engineering::Civil engineering Corrosion Finite Element Methods Steel reinforcement corrosion is becoming a critical issue since more old buildings are still in operations with great probability of substantial corrosion in reinforcements. The strength and serviceability of corroded RC slab is remarkably impacted by the corrosion. Therefore, it is vital to understand more about the punching shear mechanism of the slabs subjected to corrosion effects in order to make a good prediction on its residual capacity. In this paper, critical shear crack theory (CSCT) was further developed to predict the residual punching shear strength of corroded RC slabs, considering the material properties deterioration induced by the corrosion. The effectiveness of modified CSCT was verified by comparing with the available experimental results. In addition, a validated FEM model that considers the material deterioration and bond degradation was proposed to verify the accuracy of proposed model. Finally, a parametric study, including 240 cases, was conducted to investigate the effect of some important factors on punching shear behavior of corroded RC slabs based on modified CSCT. The outcomes demonstrated that the residual punching shear capacity predicted by the proposed model is more accurate than existing design codes. The predicted failure modes had also shown fairly good agreement with the experimental results. 2022-09-20T03:00:30Z 2022-09-20T03:00:30Z 2022 Journal Article Yang, Z., Zhang, X. & Li, B. (2022). Residual punching shear capacity of corroded reinforced concrete slabs. Magazine of Concrete Research, 1-15. https://dx.doi.org/10.1680/jmacr.21.00308 0024-9831 https://hdl.handle.net/10356/161786 10.1680/jmacr.21.00308 2-s2.0-85131079966 1 15 en Magazine of Concrete Research © 2022 ICE Publishing: All rights reserved. |
| spellingShingle | Engineering::Civil engineering Corrosion Finite Element Methods Yang, Zhihong Zhang, Xinchen Li, Bing Residual punching shear capacity of corroded reinforced concrete slabs |
| title | Residual punching shear capacity of corroded reinforced concrete slabs |
| title_full | Residual punching shear capacity of corroded reinforced concrete slabs |
| title_fullStr | Residual punching shear capacity of corroded reinforced concrete slabs |
| title_full_unstemmed | Residual punching shear capacity of corroded reinforced concrete slabs |
| title_short | Residual punching shear capacity of corroded reinforced concrete slabs |
| title_sort | residual punching shear capacity of corroded reinforced concrete slabs |
| topic | Engineering::Civil engineering Corrosion Finite Element Methods |
| url | https://hdl.handle.net/10356/161786 |
| work_keys_str_mv | AT yangzhihong residualpunchingshearcapacityofcorrodedreinforcedconcreteslabs AT zhangxinchen residualpunchingshearcapacityofcorrodedreinforcedconcreteslabs AT libing residualpunchingshearcapacityofcorrodedreinforcedconcreteslabs |