Fused structures for safer and more economical constructions

doi:10.1007/s11709-019-0541-7

Front. Struct. Civ. Eng.

2020, Vol. 14

Issue (1) : 1-9 https://doi.org/10.1007/s11709-019-0541-7

RESEARCH ARTICLE

Fused structures for safer and more economical constructions

Yu-Fei WU¹, Ying-Wu ZHOU², Biao HU², Xiaoxu HUANG², Scott SMITH³(

)

¹. School of Engineering, RMIT University, Melbourne, VIC 3001, Australia
². Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, Shenzhen University, Shenzhen 518061, China
³. School of Civil, Environmental and Mining Engineering, The University of Adelaide, South Australia 5005, Australia

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Abstract

Safety margin and construction costs are two conflicting goals for a structure. By providing a fuse in a structure that is triggered at a certain level of over-loading, further increase of loading is prohibited and failure of the structure is changed to a safer mode. As overloading is controlled and a safer failure mode is enforced, a fused structure requires a smaller safety factor thus leading to more economical construction without compromising safety. The use of a fuse will also facilitate safer use of advanced construction materials such as fiber-reinforced polymer (FRP) composites. In this case, a fuse can transfer the sudden and dangerous failure mode associated with brittle FRP debonding or rupture to a safe and ductile failure mode at the fuse location. This paper introduces a new type of fused structure as well as an associated design philosophy and approach, in addition to examples of engineering applications.

Keywords fused structures structural fuse fiber-reinforced polymer concrete

Corresponding Author(s): Scott SMITH

Just Accepted Date: 04 July 2019 Online First Date: 23 September 2019 Issue Date: 21 February 2020

Cite this article:

Yu-Fei WU,Ying-Wu ZHOU,Biao HU, et al. Fused structures for safer and more economical constructions[J]. Front. Struct. Civ. Eng., 2020, 14(1): 1-9.

URL:

https://academic.hep.com.cn/fsce/EN/10.1007/s11709-019-0541-7
https://academic.hep.com.cn/fsce/EN/Y2020/V14/I1/1

Fig.1 Plastic deformation in plastic hinge zone. (a) Conventional RC member; (b) CY member.

Fig.2 Compression yielding structural system. (a) CY block cast into an RC beam; (b) test results of CY beams.

Fig.3 Stress-strain curves of non-ductile and ductile materials.

Fig.4 Costs versus reliability index.

Tab.1 Target reliability index b_T at ultimate state of structures under 50-year period

Fig.5 Structural configuration of an RC beam containing a fuse.

Fig.6 Stress-strain model of CY block.

Fig.7 Optimal curvature relationship.

Fig.8 Schematic diagram of a footbridge containing a CY block fuse in each arch segment.

Fig.9 Free body diagram of the arch.

Fig.10 Relationship between b and f.

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