气候变化领域集成服务门户(CCPortal): Realising the reserve capacity in existing reinforced concrete columns

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DOI	10.1016/j.istruc.2024.106360
	Realising the reserve capacity in existing reinforced concrete columns
	Mei, Xiaohan; Hawkins, Will; Darby, Antony; Ibell, Tim
发表日期	2024
ISSN	2352-0124
起始页码	63
卷号	63
英文摘要	Under the urgent global climate change situation and massive dwelling shortages in the UK, vertical extension and building conversions are viable approaches to supply dwellings sustainably and economically. However, in such reinforced concrete (RC) buildings, columns are often strengthened in related projects, which can be costly and time-consuming, while causing disruption to the residents or the daily running of business. In fact, this paper shows that strengthening could be avoided, as RC columns have more redundant capacity than one might have suspected. This paper quantifies this reserved structural capacity for the first time. There are many reasons for structural over-design inherent in today's RC columns, emanating from the original structural design, construction, and present-day structural assessment stages. Each unlocks some spare capacity in existing RC columns. This paper groups the guaranteed 'minimum' and the 'likely' values of 'overdesign factors' to offer up values for minimum over-design and likely over-design in RC columns. It is well understood that seismic actions significantly influence buildings' structural capacity. However, this paper exclusively focuses on the non-seismic zones of the UK. It transpires that for typical UK 1960 s purpose-built flats the guaranteed 'minimum' capacity of the columns that can be unlocked through following the 'minimum' path is 32%. This is already a significant unlocked capacity, in wait of exploitation. But, even better, it is found to be likely that such columns are only working at 15% of their potential capacity, which gives a 'likely' reserve capacity of 85%. In summary, significant capacity in an RC column can be unlocked from following both paths, which is readily available for retrofit vertical-extension exploitation. This would eradicate costly, disruptive strengthening. This paper provides the evidence base for such opportunity.
英文关键词	Structural over -design; Utilisation ratio; Existing reinforced concrete columns; Structural capacity quantification
语种	英语
WOS研究方向	Engineering
WOS类目	Engineering, Civil
WOS记录号	WOS:001227355600001
来源期刊	STRUCTURES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/302589
作者单位	University of Bath; University of Bath
推荐引用方式 GB/T 7714	Mei, Xiaohan,Hawkins, Will,Darby, Antony,et al. Realising the reserve capacity in existing reinforced concrete columns[J],2024,63.
APA	Mei, Xiaohan,Hawkins, Will,Darby, Antony,&Ibell, Tim.(2024).Realising the reserve capacity in existing reinforced concrete columns.STRUCTURES,63.
MLA	Mei, Xiaohan,et al."Realising the reserve capacity in existing reinforced concrete columns".STRUCTURES 63(2024).