RESEARCH ARTICLE


Dynamic Responses of RPC-Filled Steel Tubular Columns Post Fire Under Blast Loading



Jinghai Wang, Wanxiang Chen*, Zhikun Guo, Wenguang Liang
State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, PLA University of Science and Tech-nology, China


Article Metrics

CrossRef Citations:
5
Total Statistics:

Full-Text HTML Views: 743
Abstract HTML Views: 323
PDF Downloads: 216
ePub Downloads: 200
Total Views/Downloads: 1482
Unique Statistics:

Full-Text HTML Views: 523
Abstract HTML Views: 254
PDF Downloads: 191
ePub Downloads: 176
Total Views/Downloads: 1144



Creative Commons License
© Wang et al.; Licensee Bentham Open.

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (https://creativecommons.org/licenses/by-nc/4.0/legalcode), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

Correspondence: Address correspondence to this author at the State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, PLA University of Science and Technology, China; Tel: +86−13913893169; E-mail: cwx_0806@sohu.com


Abstract

Blast-resistant capacities of 4 large scale circular Reactive Powder Concrete Filled Steel Tubular (RPC-FST) columns after exposure to fire are experimentally examined. The overpressures of shock wave, the deflections and strains of RPC-FST column specimens are recorded by advanced gauges. The influences of fire durations and scaled standoff distances of explosive charge on the dynamic behaviors and failure modes are discussed. It is shown that the RPC-FST columns remain excellent blast-resistant capacities after exposure to fire. RPC core column can be effectively confined by steel tube, but the blast-resistant capacities of RPC-FST columns are decreased as explosive charge or fire duration increased. The failure modes are transited from bending types to bending-shear types as explosive charge increased, and an obvious plastic hinge at mid-span section can be observed in the RPC-FST column with fire duration of 105min. It is also indicated that the maximum displacements of RPC-FST columns are more sensitive to fire duration than to explosive charge weight.

Keywords: Blast-resistant capacity, experimental study, fire duration, RPC filled steel tubular column, scaled standoff distance.