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Appl. Sci. 2017, 7(10), 1018; doi:10.3390/app7101018

Experimental Study on the Performance of Polyurethane-Steel Sandwich Structure under Debris Flow

1,2
,
2
and
1,2,*
1
State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China
2
Research Institute of Structural Engineering and Disaster Reduction, Tongji University, Shanghai 200092, China
*
Author to whom correspondence should be addressed.
Received: 7 September 2017 / Revised: 28 September 2017 / Accepted: 29 September 2017 / Published: 2 October 2017
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Abstract

Polyurethane-steel sandwich structure, which creatively uses the polyurethane-steel sandwich composite as a structural material, is proposed to strengthen the impact resistance of buildings under debris flow. The impact resistance of polyurethane-steel sandwich structure under debris flow is investigated by a series of impact loading tests, compared with that of traditional steel frame structures. Additionally, further discussions regarding the hidden mechanism are performed. During the whole impact process, as for steel frame structure, the impacted column appeared obvious local deformation both at its column base and on the impact surface, leading to remarkable decrease of its impact resistance; while the stress and strain of polyurethane-steel sandwich structure develops more uniformly and distribute further in the whole structure, maintaining excellent integrity and impact transmission capability. The impact loading tests confirm that polyurethane-steel sandwich structure possesses superior impact resistance under debris flow. This is of great practical significance for the prevention and reduction of geological disasters. View Full-Text
Keywords: polyurethane-steel sandwich structure; debris flow; impact loading tests; impact resistance polyurethane-steel sandwich structure; debris flow; impact loading tests; impact resistance
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Li, P.; Liu, S.; Lu, Z. Experimental Study on the Performance of Polyurethane-Steel Sandwich Structure under Debris Flow. Appl. Sci. 2017, 7, 1018.

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