Tests on composite beams using new connections by adherence

Diógenes, Hidelbrando José Farkat; Debs, Ana Lúcia Homce de Cresce El; Valente, Isabel

doi:10.1680/jstbu.16.00175

Cited by 4 publications

(4 citation statements)

References 16 publications

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“…(1) As pointed out by Diógenes et al [7], special attention should be given to the fatigue behavior of the connection under vehicular loading and the response under long-term loading.…”

Section: Discussionmentioning

confidence: 99%

“…As shown in Figure 3, this idea comes from the Perfobond shear connectors, in which the shear resistance is expected to be increased considering the confined concrete inside the connector's openings. Flexural tests of composite beams using the improved adhesive connection were also conducted by Diógenes et al [7]. e test results showed that the presence of holes in the connectors had a limited contribution to the flexural stiffness and the loading capacity of the specimens.…”

Section: Introductionmentioning

confidence: 96%

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An Enhanced UHPC‐Grout Shear Connection for Steel‐Concrete Composite Bridges with Precast Decks

Zheng

Tang

2021

Advances in Civil Engineering

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This article develops an enhanced UHPC-grout shear connection for steel-concrete composite bridges with precast decks. The primary improvement is the use of ultra-high performance concrete (UHPC) as the connection grout. To validate the constructability and the mechanical performance of the new connection, two series of experimental tests (including grouting tests and push-out tests) were conducted. Results from the grouting tests show that both the pressure grouting method and the self-levelling grouting method are applicable to inject the UHPC grout into the channel void of the connection. Results from the push-out tests indicate that the advanced properties of UHPC allow for a significant improvement of the shear resistance of the adhesive connection over traditional cementitious grouts. The ultimate shear capacity of the adhesive connection is controlled by the interface shear strength between the embossed steel and the UHPC grout, with a cohesion value of approximately 5.87 MPa. Meanwhile, the residual frictional resistance can be taken as approximately one-half of the ultimate resistance. The results of the finite-element analysis show that the trilinear model is reasonable to simulate the shear-slip laws of the embossed steel-grout interface and the rough concrete-grout interface.

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“…(1) As pointed out by Diógenes et al [7], special attention should be given to the fatigue behavior of the connection under vehicular loading and the response under long-term loading.…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

An Enhanced UHPC‐Grout Shear Connection for Steel‐Concrete Composite Bridges with Precast Decks

Zheng

Tang

2021

Advances in Civil Engineering

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“…The fifth paper (Diógenes et al, 2018) presents and discuss full-scale flexural tests of composite beams using a novel shear connection interfaces based on adhesion, interlocking and friction. Two beams with conventional cast-in-place slabs were also tested for comparison purposes.…”

Section: Structures and Buildingsmentioning

confidence: 99%

Editorial

Vellasco

Costa-Neves

Chan

2018

Proceedings of the Institution of Civil Engineers - Structures

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2 3This is the second part of a two-part themed issue 'Composite (steel and concrete) structures -new developments and trends'. The aim of themed issue is to capture the state-of-the-art in the design of composite structures made from steel and concrete as there has been a boost in the use of composite structures (steel and concrete) worldwide. This second part features seven papers contributed by authors from different countries including Brazil, China, Greece, Iran, Hong Kong, Portugal, and United Kingdom. Authors shared their latest technical assessment on the next Eurocode 4, composite columns, composite connections, steel truss reinforced composite joints, shear connection by adhesion and interlocking & friction, sandwich panel infilled steel frames and composite steel frames with reinforced concrete infill.The first paper by Johnson (2018) presents an overview of the challenges faced in developing the next Eurocode 4 for composite structures. The paper initially describes the nature of comments received and recent information from research followed by a discussion of the priorities for inclusion in Eurocode 4. The main requests are centred on the needs to make it easier to use, to shorten it and to include much new material. This paper also presents examples of where removal of uncertainty and a few deletions would make EC4 more user-friendly. As for the new material, it indicates that priority should be given to the inclusion of provisions which fills gaps in current recommendations. Some requests for extension of scope have also been listed, with reasons given why some of them should not be accepted.The second paper by Zhu and Chan (2018) is a contribution in the field of the novel trend in composite structures, that is the association of steel or high strength steel with high strength concrete (around 100 MPa). The study experimentally and numerically evaluates the axial behaviour of concrete-filled steel tubes (CFST) with triangular, hexagonal and octagonal cross-sections and using high-strength concrete. The paper discusses the impact of cross-section shape on the load capacity and ductility of these CFST sections. The outcome of the experimental studies were also used in the assessment of existing design provisions in European, American and Chinese standards. The paper also presents finite-element models incorporating three existing concrete constitutive models and compares these results to the previously performed experiments. Finally, design approaches for CFST were also reviewed and assessed.The third paper by Rodrigues et al. (2018) evaluates the structural response of composite joints situated in hogging moment regions. An experimental program was proposed and was centred on the development of an alternative for the standard push out tests. In hogging moment regions the concrete slab is not under compression forces and it can lead to an extensive concrete cracking that may affect the actual structural joint response. An alternative setup (i.e. pull out tests) was developed and described to repre...

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“…As shown in Figure 2b, the horizontal shear resistance of the connection is controlled by two interfaces: the grout-concrete interface (interface 1), and the steel-grout interface (interface 2). Papastergiou and Lebet [10] conducted several improvements to this type of connection, including the absence of a bonding layer on the upper flange to improve the brittle behavior of the connection, the presence of circular holes in the steel rib to generate a "dowel effect" [11], and the use of high-performance mortar as the injection [12]. The connection by adhesion, interlocking, and friction offers an alternative solution for the accelerated construction of steel-concrete composite bridges.…”

Section: Introductionmentioning

confidence: 99%

Experimental Behavior of Steel-Concrete Composite Girders with UHPC-Grout Strip Shear Connection

Tian³

et al. 2021

Buildings

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This paper develops a new type of shear connection for steel-concrete composite bridges using Ultra-High Performance Concrete (UHPC) as the connection grout. The UHPC-grout strip shear connection is fabricated by preforming a roughened slot in the concrete deck slab, welding an embossed steel rib longitudinally to the upper flange of the steel girder, and casting the strip void between the slot and the steel rib with UHPC grout. The structural performance of the new connection was validated by two sets of experimental tests, including push-out testing of shear connectors and static and fatigue testing of composite beams. The results of push-out testing indicate that the UHPC-grout strip shear connection exhibits a significant improvement of ductility, ultimate capacity, and fatigue performance. The interface shear strength of the UHPC-grout strip connection is beyond 15 MPa, which is about three times that of the strip connection using traditional cementitious grouts. The ultimate capacity of the connection is dominated by the interface failure between the embossed steel and the UHPC grout. The results of composite-beam testing indicate that full composite action is developed between the precast decks and the steel beams, and the composite action remained intact after testing for two million load cycles. Finally, the trail design of a prototype bridge shows that this new connection has the potential to meet the requirements for horizontal shear.

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Tests on composite beams using new connections by adherence

Cited by 4 publications

References 16 publications

An Enhanced UHPC‐Grout Shear Connection for Steel‐Concrete Composite Bridges with Precast Decks

An Enhanced UHPC‐Grout Shear Connection for Steel‐Concrete Composite Bridges with Precast Decks

Editorial

Experimental Behavior of Steel-Concrete Composite Girders with UHPC-Grout Strip Shear Connection

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