Circular recycled aggregate concrete-filled stainless steel tube stub columns after exposure to fire: experiments, simulations, and design
This paper presents experimental and numerical investigations into the post-fire cross-section compressive behaviour and resistances of circular recycled aggregate concrete-filled stainless steel tube (RACFSST) stub columns. Twelve stub column specimens, fabricated from concretes with three recycled...
| Main Authors: | , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2024
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/180212 |
| _version_ | 1826112220532047872 |
|---|---|
| author | Wang, Ziyi Zhong, Yukai Zhao, Ou |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Wang, Ziyi Zhong, Yukai Zhao, Ou |
| author_sort | Wang, Ziyi |
| collection | NTU |
| description | This paper presents experimental and numerical investigations into the post-fire cross-section compressive behaviour and resistances of circular recycled aggregate concrete-filled stainless steel tube (RACFSST) stub columns. Twelve stub column specimens, fabricated from concretes with three recycled coarse aggregate replacement ratios (0%, 35% and 70%), were tested after exposure to the ISO-834 standard fire for 0 min (i.e. at ambient temperature), 15 min, 30 min and 45 min. The experimental investigation included heating and cooling of specimens, cylinder tests and post-fire tensile coupon tests and stub column tests. The test results, including load–end shortening curves, failure loads and failure modes, were fully reported and the initial compressive stiffnesses and confinement effect were discussed. The numerical investigation was subsequently conducted, where thermal and mechanical finite element models were developed and validated against the test results and then used to perform parametric studies to generate further numerical data. Given the absence of design codes for stainless steel–recycled aggregate concrete composite structures after exposure to fire, the relevant design rules for circular natural aggregate concrete-filled carbon steel tube stub columns at ambient temperature, as set out in the European code, Australia/New Zealand standard and American specification, were assessed, using post-fire material properties, for their applicability to circular RACFSST stub columns after exposure to fire, based on the test and numerical data. The assessment results generally revealed that the European code and the Australian/New Zealand standard led to an acceptable level of design accuracy and consistency, while the American specification resulted in rather conservative and scattered post-fire cross-section compression resistance predictions. |
| first_indexed | 2024-10-01T03:03:24Z |
| format | Journal Article |
| id | ntu-10356/180212 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:03:24Z |
| publishDate | 2024 |
| record_format | dspace |
| spelling | ntu-10356/1802122024-09-24T04:25:57Z Circular recycled aggregate concrete-filled stainless steel tube stub columns after exposure to fire: experiments, simulations, and design Wang, Ziyi Zhong, Yukai Zhao, Ou School of Civil and Environmental Engineering Engineering Compression tests Design analyses This paper presents experimental and numerical investigations into the post-fire cross-section compressive behaviour and resistances of circular recycled aggregate concrete-filled stainless steel tube (RACFSST) stub columns. Twelve stub column specimens, fabricated from concretes with three recycled coarse aggregate replacement ratios (0%, 35% and 70%), were tested after exposure to the ISO-834 standard fire for 0 min (i.e. at ambient temperature), 15 min, 30 min and 45 min. The experimental investigation included heating and cooling of specimens, cylinder tests and post-fire tensile coupon tests and stub column tests. The test results, including load–end shortening curves, failure loads and failure modes, were fully reported and the initial compressive stiffnesses and confinement effect were discussed. The numerical investigation was subsequently conducted, where thermal and mechanical finite element models were developed and validated against the test results and then used to perform parametric studies to generate further numerical data. Given the absence of design codes for stainless steel–recycled aggregate concrete composite structures after exposure to fire, the relevant design rules for circular natural aggregate concrete-filled carbon steel tube stub columns at ambient temperature, as set out in the European code, Australia/New Zealand standard and American specification, were assessed, using post-fire material properties, for their applicability to circular RACFSST stub columns after exposure to fire, based on the test and numerical data. The assessment results generally revealed that the European code and the Australian/New Zealand standard led to an acceptable level of design accuracy and consistency, while the American specification resulted in rather conservative and scattered post-fire cross-section compression resistance predictions. Ministry of Education (MOE) The present research work is financially supported by the Singapore Ministry of Education Academic Research Fund (AcRF) Tier 1 Grant (Award Number: RG122/21) and the National Natural Science Foundation of China (NSFC) (Grant Number: 52308158). The recycled coarse aggregates used in the present research were sponsored by Pan-United Corporation Ltd. 2024-09-24T04:25:57Z 2024-09-24T04:25:57Z 2024 Journal Article Wang, Z., Zhong, Y. & Zhao, O. (2024). Circular recycled aggregate concrete-filled stainless steel tube stub columns after exposure to fire: experiments, simulations, and design. Engineering Structures, 302, 117418-. https://dx.doi.org/10.1016/j.engstruct.2023.117418 0141-0296 https://hdl.handle.net/10356/180212 10.1016/j.engstruct.2023.117418 2-s2.0-85182430723 302 117418 en RG122/21 Engineering Structures © 2024 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering Compression tests Design analyses Wang, Ziyi Zhong, Yukai Zhao, Ou Circular recycled aggregate concrete-filled stainless steel tube stub columns after exposure to fire: experiments, simulations, and design |
| title | Circular recycled aggregate concrete-filled stainless steel tube stub columns after exposure to fire: experiments, simulations, and design |
| title_full | Circular recycled aggregate concrete-filled stainless steel tube stub columns after exposure to fire: experiments, simulations, and design |
| title_fullStr | Circular recycled aggregate concrete-filled stainless steel tube stub columns after exposure to fire: experiments, simulations, and design |
| title_full_unstemmed | Circular recycled aggregate concrete-filled stainless steel tube stub columns after exposure to fire: experiments, simulations, and design |
| title_short | Circular recycled aggregate concrete-filled stainless steel tube stub columns after exposure to fire: experiments, simulations, and design |
| title_sort | circular recycled aggregate concrete filled stainless steel tube stub columns after exposure to fire experiments simulations and design |
| topic | Engineering Compression tests Design analyses |
| url | https://hdl.handle.net/10356/180212 |
| work_keys_str_mv | AT wangziyi circularrecycledaggregateconcretefilledstainlesssteeltubestubcolumnsafterexposuretofireexperimentssimulationsanddesign AT zhongyukai circularrecycledaggregateconcretefilledstainlesssteeltubestubcolumnsafterexposuretofireexperimentssimulationsanddesign AT zhaoou circularrecycledaggregateconcretefilledstainlesssteeltubestubcolumnsafterexposuretofireexperimentssimulationsanddesign |