Experimental study of eccentrically loaded high-strength concrete filled circular high-strength steel tubular columns after fire exposure

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL Thin-Walled Structures Pub Date : 2025-01-26 DOI:10.1016/j.tws.2025.113010

Tao Du , Faqi Liu , Hua Yang , Ying Li , Yinglong Li

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引用次数: 0

Abstract

The high-strength concrete filled high-strength steel tubular (HCFHST) column has garnered considerable attention in both engineering and academia due to its remarkable performance. Nevertheless, current research on high-strength materials revealed that the residual performance of HCFHST columns after fire exposure may be inferior to that of conventional CFST columns. In order to advance the understanding of this area, a total of 16 circular stub HCFHST specimens were subjected to ISO 834 standard fire and then tested under eccentric load after cooling down. The temperatures across the section, load-displacement curves, and load-strain curves were presented. Besides, the effect of heating duration and load eccentricity on the residual eccentric load-bearing capacities was analyzed and discussed. Further, following the determination of the cross-sectional temperature distribution using COMSOL Multiphysics, three methods were explored to predict the residual bearing capacities of the HCFHST columns. The results show the necessity of proposing more convenient and accurate calculation methods for predicting the post-fire strength of HCFHST columns.

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.