STATIC BEHAVIOUR OF REINFORCED HIGH STRENGTH CONCRETE HAUNCHED BEAMS STRENGHENED BY USING EPOXY BONDED EXTERNAL STEEL PLATES

Four test pieces with different steel plate center-to-center distances and reinforcement ratios are subjected to low-cycle repeat quasistatic loading to optimize properties as failure mode, hysteretic curve, skeleton curve, energy dissipation parameters, strength parameters, and seismic performance of high-strength concrete low-rise shear walls. The embedded steel plates are shown to effectively restrict wall crack propagation, enhance the overall steel ratio, and improve the failure mode of the wall while reducing the degree of brittle failure. Under the same conditions, increasing the spacing between the steel plates in the steel plate concrete shear wall can effectively preserve the horizontal bearing capacity of the shear wall under an ultimate load. The embedded steel plates perform better than concealed bracing in delaying stiffness degeneration in the low-rise shear walls, thus safeguarding their long-term bearing capacity. The results presented here may provide a workable basis for shear wall design optimization.

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Experimental Research on Antiseismic Performance of High-Strength Concrete High-Shear Walls with Built-In Steel Plates

Advances in Civil Engineering ◽

10.1155/2019/4769404 ◽

2019 ◽

Vol 2019 ◽

pp. 1-22 ◽

Cited By ~ 1

Author(s):

Yu Yu ◽

Min Gan ◽

Yan Zhang ◽

Liren Li ◽

Huakun Zhang

Keyword(s):

Bearing Capacity ◽

High Strength Concrete ◽

Research Result ◽

High Strength ◽

Shear Wall ◽

Steel Plates ◽

Experimental Result ◽

Strength Concrete ◽

Composite Shear Wall ◽

Composite Shear

To study the antiseismic performance of the high-strength concrete composite shear wall with built-in steel plates, an experiment on a high-strength concrete composite shear wall with four built-in steel plates (SPRCW-1∼4) was set up. Based on the experimental result, the paper discusses the antiseismic performance, failure mode, and failure mechanism of the high-strength concrete composite shear wall with built-in steel plates under different steel ratios and different positions of steel plates. The experimental result has shown that the differences in steel plate position and steel ratios have certain effects on wall cracking. The use of high steel content and the placement of steel plates on both sides of the wall can limit wall cracking to some extent. When the bearing capacity of the steel plates located on both sides of the wall is larger than that in the middle of the wall, a high content of steel in the wall can effectively increase the bearing capacity of the test piece to some extent. Under a high axial compression ratio, the horizontal bar of the wall can substantially limit the vertical cracks in concrete arising from compression. Moreover, the built-in steel plates in the shear wall play a significant role in inhibiting the propaganda of the oblique cracks under the action of earthquakes. The research result has very good economy and operability and can provide a basis for promotion and application of the mid- and high-rise buildings in regions with high seismic intensity.

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Static behaviour of multi-row stud shear connectors in high- strength concrete

Steel and Composite Structures ◽

10.12989/scs.2014.17.6.967 ◽

2014 ◽

Vol 17 (6) ◽

pp. 967-980 ◽

Cited By ~ 10

Author(s):

Qingtian Su ◽

Guotao Yang ◽

Mark A. Bradford

Keyword(s):

High Strength Concrete ◽

High Strength ◽

Strength Concrete ◽

Shear Connectors ◽

Static Behaviour

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Refurbishment of orthotropic steel decks with steel plates

10.2749/ghent.2021.1496 ◽

2021 ◽

Author(s):

Maarten Rikken ◽

Daan Tjepkema ◽

Rupert Gibson ◽

David Gration

Keyword(s):

High Strength Concrete ◽

Joint Venture ◽

Heavy Traffic ◽

High Strength ◽

Steel Bridges ◽

Steel Plates ◽

Strength Concrete ◽

Innovative Solution ◽

Orthotropic Steel Decks ◽

Steel Deck

<p>A common problem in steel bridges is fatigue of orthotropic decks due to heavy traffic demands. Whilst replacing the asphalt with a high strength concrete overlay can solve this problem, it imposes significant additional self-weight. This additional self-weight often requires strengthening of the superstructure which in turn can result in long execution times with associated hindrance and costs. As no existing method addressed these issues Arup engineers developed an innovative solution for Rijkswaterstaat (RWS), the Dutch Highways Authority. The new solution consists of bolting steel plates to the orthotropic steel deck, stiffening it for fatigue. Arup and RHDHV work in a joint venture, the Managing Contractor, on the renovation of steel bridges for and with RWS.</p>

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Experimental Study on the Mechanical Properties of Perfobond Rib Shear Connectors with Steel Fiber High Strength Concrete

Materials ◽

10.3390/ma14123345 ◽

2021 ◽

Vol 14 (12) ◽

pp. 3345

Author(s):

Fangwen Wu ◽

Shuo Liu ◽

Chengfeng Xue ◽

Kangkang Yang ◽

Yanpeng Feng ◽

...

Keyword(s):

Mechanical Properties ◽

High Strength Concrete ◽

Steel Fiber ◽

Concrete Strength ◽

High Strength ◽

Shear Capacity ◽

Steel Plates ◽

Enhancement Effect ◽

Strength Concrete ◽

Shear Connectors

Perfobond rib (PBL) shear connectors, made up of the perforated steel plates with the penetrating rebars passing through the holes, are extensively adopted in steel-concrete composite structures for their excellent performance. The adequate understanding of mechanical properties for PBL connectors is of great significance for their reasonable design. In this study, a push out experiment, including 12 specimens with the parameters of concrete strength, diameter of penetrating rebars and the number of holes on perforated steel plate, was performed to explore the mechanical behavior of PBL connectors with steel fiber high strength concrete (SFHSC). The experimental results showed that the shear capacity of the PBL connectors increased with the increase in concrete strength, diameter of the penetrating rebars and the number of holes. Furthermore, a general prediction formula for the shear capacity of PBL connectors was developed, which considers the shear contribution of concrete dowels, concrete end-bearing, interfacial bonding between the perforated steel plates and concrete and the penetrating rebars as well as the enhancement effect of steel fibers. The prediction results of the equation are in good agreement with the experimental data and could provide a reference for the design of PBL connectors.

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