Seismic performance assessment of non-code-conforming and code-conforming supporting structures of elevated tanks using conventional and risk-based decision models

available online 13th November 2020

Stefano Caprinozzi (Author), Matjaž Dolšek (Author)

Abstract

The seismic performance of the supporting structure of the replica of an elevated tank that collapsed during the Kocaeli earthquake and its variant designed according to Eurocode 8 provisions was investigated. First, the performance of the tank was verified for the Kocaeli ground motion. Results of non-linear seismic response history analysis using simplified models accounting for different tank filling levels showed that the simplified model could provide qualitatively the same damage as were observed during the earthquake, while the seismic performance of the code-conforming tank was satisfactory. Then, the seismic performance assessment of the non-code- and code-conforming tanks was further investigated using the conventional decision model, which accounts for the demand-to-capacity ratio given the seismic design action, the conditional risk-based decision model and the risk-based decision model which utilise, respectively, the probability of exceeding a designated limit state for a given design seismic action and for a given period. The seismic performance of the non-code-conforming elevated tank was found insufficient by any of the three decision models, which indicated the need for action towards risk reduction for such structures. The opposite was realised for the code-conforming tank. However, the conventional decision model may be misleading because it indicated that the structure might be considered overdesigned, while risk-based decision model showed that the seismic performance of the code-conforming tank was close to the target value, set to 1% in 50 years. In the future, risk-targeted design approaches can improve decision-making in the design of critical components of industrial facilities.

Keywords

gradbeništvo;konstrukcije;rezervoarji;rafinerije;analiza potresne ranljivosti;odločitveni model;steel storage tanks;petrochemical plant;seismic fragility analysis;risk analysis;decision models;seismic action;

Data

Language:	English
Year of publishing:	2020
Typology:	1.01 - Original Scientific Article
Organization:	UL FGG - Faculty of Civil and Geodetic Engineering
UDC:	624.042.7
COBISS:	37956611
ISSN:	0141-0296
Views:	528
Downloads:	329
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	gradbeništvo;konstrukcije;rezervoarji;rafinerije;analiza potresne ranljivosti;odločitveni model;
Type (COBISS):	Article
Pages:	str. 1-13
Volume:	ǂŠt. ǂ111469
Issue:	ǂletn. ǂ227
Chronology:	jan. 2021
DOI:	10.1016/j.engstruct.2020.111469
ID:	12165291