Shear Behaviour of Steel Girder with Web-Corrugated Core Sandwich Panels

Textile-reinforced concrete (TRC) is a new composite material made of high-strength textiles embedded within fine grained concrete (FGC). The application of TRC leads to the design of thin and slender structures or for repairing and strengthening of existing structural members. Autoclaved aerated concrete (AAC) is an ultra-lightweight concrete, which can be combined with high strength TRC to form some kinds of precast curtain panels in construction. The concept of the TRC-AAC panel is based on the theory of sandwich construction with strong and stiff skins, like TRC layers, bonded to a lightweight AAC core. The resulting hybrid TRC-AAC panel can be used as structural or non-structural member for the housing construction. In this paper, the flexural and shear performance of hybrid TRC-AAC sandwich panels is presented by means of experimental results. The sandwich panels use three layers of diﬀerent materials: TRC for the tensile layer, AAC for the core material and FGC for the compressive layer. Three different types of glass textile were used as reinforcements in the TRC layers.

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Experimental Investigation on the Shear Behaviour of Stud-Bolt Connectors of Steel-Concrete-Steel Fibre-Reinforced Recycled Aggregates Sandwich Panels

Materials ◽

10.3390/ma14185185 ◽

2021 ◽

Vol 14 (18) ◽

pp. 5185

Author(s):

Arash Karimipour ◽

Mansour Ghalehnovi ◽

Mohammad Golmohammadi ◽

Jorge de Brito

Keyword(s):

Shear Strength ◽

Coarse Aggregate ◽

Sandwich Panels ◽

High Strength ◽

Steel Plates ◽

Recycled Aggregates ◽

Shear Behaviour ◽

Concrete Core ◽

Steel Fibres ◽

Normal Strength

Steel-concrete-steel (SCS) sandwich panels are manufactured with two thin high-strength steel plates and a moderately low-density and low-strength thick concrete core. In this study, 24 specimens were produced and tested. In these specimens, a new stud-bolt connector was used to regulate its shear behaviour in sandwich panels. The bolts’ diameter, concrete core’s thickness and bolts’ spacing were the parameters under analysis. Furthermore, the concrete core was manufactured with normal-strength concrete and steel fibres concrete (SFC). Steel fibres were added at 1% by volume. In addition, the recycled coarse aggregate was used at 100% in terms of mass instead of natural coarse aggregate. Therefore, the ultimate bearing capability and slip of the sandwich panels were recorded, and the failure mode and ductility index of the specimens were evaluated. A new formula was also established to determine the shear strength of SCS panels with this kind of connectors. According to this study, increasing the diameter of the stud-bolts or using SFC in sandwich panels improve their shear strength and ductility ratio.

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Shear resistance of sandwich panel connection at elevated temperature

Journal of Structural Fire Engineering ◽

10.1108/jsfe-03-2021-0013 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Kamila Cábová ◽

Marsel Garifullin ◽

Ashkan Shoushtarian Mofrad ◽

František Wald ◽

Kristo Mela ◽

...

Keyword(s):

Ambient Temperature ◽

Sandwich Panel ◽

Elevated Temperatures ◽

Sandwich Panels ◽

Analytical Models ◽

Shear Behaviour ◽

Structural Members ◽

Lightweight Construction ◽

Content Type ◽

Sandwich Construction

PurposeSandwich construction has developed and has become an integral part of lightweight construction. In the recent projects, it has been shown that by using sandwich panels as stabilizing members, a considerable amount of savings of steel can be achieved for structural members at ambient temperature. These stabilizing effects may also help to achieve similar savings in case of fire.Design/methodology/approachThe response of a sandwich single panel as well as the behaviour of the whole structure at ambient temperature and in case of fire is influenced by joints between the sandwich panels and the sub-structure. The fastenings used to fix the sandwich panels to a sub-structure may be loaded by shear forces caused by self-weight, live loads or diaphragm action. Therefore, an experimental investigation was conducted to investigate the shear behaviour of sandwich panel joints in fire.FindingsThis paper summarized briefly the experimental results, numerical simulations and analytical models on the shear behaviour of sandwich panel joints at ambient and elevated temperatures.Research limitations/implicationsThe work is limited to studied types of screws and sandwich panels which are generally used in current sandwich construction.Practical implicationsThese stabilizing effects in sandwich construction help to achieve savings in case of fire.Social implicationsSandwich construction has developed and has become an integral part of lightweight construction. In the recent projects, it has been shown that by using sandwich panels as stabilizing members, a considerable amount of savings of steel can be achieved for structural members at ambient temperature. These stabilizing effects help to achieve similar savings in case of fire.Originality/valueThis paper summarized briefly the experimental results, numerical simulations and analytical models on the shear behaviour of sandwich panel joints at ambient and elevated temperatures, which were not published yet.

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