Seismic experiment and performance index studies on recycled aggregate concrete filled steel tube frames infilled with recycled hollow block filler walls

Meng, Ercong; Yu, Yong; Zhang, Xianggang; Su, Yisheng

doi:10.1002/suco.202000254

Cited by 4 publications

(4 citation statements)

References 30 publications

(33 reference statements)

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“…Due to the good seismic performance and high bearing capacity, traditional concrete filled steel tube (CFST) structures are widely used in modern engineering practices 1 – 3 . As a new type of concrete-rubber concrete, rubber particles are used to partially replace natural aggregates.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on rubber concrete filled steel tube members under pure bending

Wang

Bai

et al. 2022

Sci Rep

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The test of four rubber concrete filled steel tube (RuCFST) members, one concrete filled steel tube (CFST) member and one empty member were conducted under pure bending. The main parameters were the shear span ratio (λ) from 3 to 5, and the rubber replacing ratio (r) from 10% to 20%. The bending moment-strain curves, the bending moment-deflection curves and the bending moment–curvature curves were obtained. The failure modes of core rubber concrete were analyzed. The failure mode of RuCFST members was bending failure from the results. The cracks of rubber concrete were distributed evenly and sparsely, and the filling of rubber in core concrete prevented the development of cracks. The shear span ratio has little effect on the behavior of the tested specimens. While the rubber replacing ratio had little effect on the bending moment capacity, but had some influence on the bending stiffness of the tested specimens. After filling in rubber concrete, the bending moment capacity and the bending stiffness can be improved compared with the empty steel tube specimen.

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Section: Introductionmentioning

confidence: 99%

Experimental study on rubber concrete filled steel tube members under pure bending

Wang

Bai

et al. 2022

Sci Rep

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“…On the one hand, RAC in a steel tube is in a three‐directional compression state, which improves its mechanical properties 13–15 . On the other hand, RAC in a steel tube can provide effective support and increase the stability of the steel tube walls 16–18 . Therefore, the RACFST structures not only utilize construction waste effectively, but also provide high load bearing capacity and good seismic performance for the CFST structures 19,20 .…”

Section: Introductionmentioning

confidence: 99%

“…stability of the steel tube walls. [16][17][18] Therefore, the RACFST structures not only utilize construction waste effectively, but also provide high load bearing capacity and good seismic performance for the CFST structures. 19,20 Therefore, the RACFST structures have significant application potential in high-rise and super high-rise buildings in seismic zones.…”

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confidence: 99%

A restoring force model for frames with steel tube columns filled with recycled aggregate concrete

Zhang

Zhou

Liu

et al. 2022

Structural Concrete

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To establish a restoring force model for recycled aggregate concrete‐filled steel tube (RACFST) frames, the quasistatic tests on two frames comprising two RACFST columns and a reinforced recycled aggregate concrete (RRAC) beam each was carried out. The recycled coarse aggregate replacement ratio was 100%. The failure mechanism, hysteretic curves, and strain response of the specimens were discussed. By analyzing the degradation of the load bearing capacity with increasing displacement amplitude and combining the hysteretic curves and stiffness degradation relationships, a restoring force model of load versus displacement adopting a trilinear approximation was proposed. The characteristic points of the model were the relative yield point, relative peak point, and relative failure point. Results showed that bending‐shear or bending failure occurred at the ends of specimen beams and plastic hinges formed there earlier than at the column ends. The hysteretic curves of load versus displacement were essentially symmetric in a full shuttle shape. The proposed restoring force model adopting trilinear approximation agreed well with the experimental hysteretic curves under low‐cycle loading and can thus be recommended to perform the elastoplastic analysis of seismic response for this new type of composite structures.

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“…In this regard, several studies pointed out the beneficial employment of recycled and waste materials as substitutes for virgin materials to reduce the use of raw materials, soil and the energy-intensive processes involved. In particular, several case-studies include the use of industrial [ 30 ], agricultural [ 31 , 32 ], construction and demolition waste [ 33 ], recycled aggregates [ 34 , 35 , 36 , 37 ] and lightweight aggregates (LWA) [ 38 , 39 , 40 , 41 , 42 ] made of waste materials as good candidates to partially substitute natural aggregates [ 43 ].…”

Section: Introductionmentioning

confidence: 99%

Innovative Materials in Italy for Eco-Friendly and Sustainable Buildings

et al. 2021

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In the last 20 years, there have been a series of seismic events in Italy that have caused serious damage to civil and building structures. This has led to a significant increase in the use of concrete for the reconstruction of new structures and the repair of existing structures damaged by earthquakes. At the same time, the concrete industry is responsible for the most significant environmental damage during the life cycle of the built environment. The environmental disadvantages characterizing the concrete industry are related to the constant growth of the exploitation of natural aggregates. Therefore, it is necessary to use alternative and innovative aggregates that provide good concrete performance and lower environmental impacts. In this study, a very promising route from an environmental point of view is given by the use of artificial aggregates from industrial waste as substitutes for natural aggregates. An innovative low cost and energy saving granulation process has been employed to produce lightweight aggregates using fly ash from the incineration of municipal solid waste and ground granulated blast furnace slag. The final aim of this research is to demonstrate the environmental sustainability of artificial aggregates, through a comparison of three different mixtures.

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Seismic experiment and performance index studies on recycled aggregate concrete filled steel tube frames infilled with recycled hollow block filler walls

Cited by 4 publications

References 30 publications

Experimental study on rubber concrete filled steel tube members under pure bending

Experimental study on rubber concrete filled steel tube members under pure bending

A restoring force model for frames with steel tube columns filled with recycled aggregate concrete

Innovative Materials in Italy for Eco-Friendly and Sustainable Buildings

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