Design of Shear Connection between Steel Truss and Concrete Slab

Macháček, Josef; Charvat, Martin

doi:10.1016/j.proeng.2013.04.091

Cited by 7 publications

(6 citation statements)

References 11 publications

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“…where: shear force P and deflection δ correspond to Comparison of 3D MNA (ANSYS) and 2D LA (SCIA) results of longitudinal shear flow under loading of 200 kN/m (corresponding approximately to design bridge loading) together with Eurocode 4 (EN 1994-1-1 2004) approach is shown in Figure 9 (the detailed description of Eurocode solution was described elsewhere, see Machacek, Charvat 2013). The 2D LA reasonably and conservatively imitates the 3D MNA analysis, justifying its use for parametric studies of longitudinal shear.…”

Section: D La Numerical Modelmentioning

confidence: 99%

“…The concentration of shear connectors above truss nodes in the regions of high longitudinal shear peaks is common in a design practice. However, the concentration of shear connectors increases the connection rigidity and subsequently attracts more shear flow to the relevant regions (Machacek, Charvat 2013). The extents of these regions were studied in some detail in former studies (Machacek, Cudejko 2011).…”

Section: Concentration Of Shear Connectors Above Truss Nodesmentioning

confidence: 99%

“…For example, in the Czech Republic only, twelve such bridges with spans between 21 and 63 m were completed during last two decades, Figure 1. Experimental and theoretical investigation of composite trusses during last decades is adequately described (Viest et al 1997;Machacek, Cudejko 2009Stadler, Mayrhofer 2010;Machacek, Charvat 2013) and therefore attention is given to research concerning longitudinal shear along the steel truss and a concrete slab only.…”

Section: Introductionmentioning

confidence: 99%

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Study on Shear Connection of Bridge Steel Truss and Concrete Slab Deck

Macháček

Charvat

2016

Journal of Civil Engineering and Management

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Longitudinal shear flow in the connection of a bridge steel truss upper chord and a concrete bridge slab is studied both in elastic and plastic stages of loading up to the shear connection collapse. First the distribution of the shear flow with an increasing level of loading is shown as resulted from 3D MNA (materially nonlinear analysis) using ANSYS software package and a former experimental verification. Nevertheless, the flow peaks in elastic stages above truss nodes due to local transfer of forces are crucial for design of the shear connection in bridges. Therefore a simple approximate 2D elastic frame modelling was suggested for subsequent extensive parametric studies. The study covers various loadings including the design loading of bridges and demonstrates importance of rigidity of the shear connection, rigidity of an upper steel truss chord and rigidity of a concrete deck. Temperature effects and a creep of concrete are also studied. The substantial part of the study deals also with concentration of shear connectors in the area of steel truss nodes and influence of the connector densification on distribution of the longitudinal shear along an interface of the steel truss chord and the concrete deck. Eurocode 4 approach and quest to find an optimum design of the shear connection in composite bridge trusses are discussed. Finally the resulting recommendations for a practical design are presented.

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Section: D La Numerical Modelmentioning

confidence: 99%

Section: Concentration Of Shear Connectors Above Truss Nodesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study on Shear Connection of Bridge Steel Truss and Concrete Slab Deck

Macháček

Charvat

2016

Journal of Civil Engineering and Management

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“…The strength of RCC in composite deck is best utilized when it is made composite to the compression carrying members of the truss. Twelve simply supported composite steel truss bridges between spans of 21m to 63 m were constructed in the Czech Republic in the last decade [2]. Apart from load sharing, composite decks also increase lateral stiffness of the structure, which renders these suitable for a number of different types of bridge systems including cable stayed bridges [3] Introduction of light weight concrete [4] and fiber reinforced composite [5] into deck slab construction can further yield to weight reduction of deck and more economical design of bridges.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Non-composite and Composite Deck Bridges

Sharma¹,

Pathak²,

Singh³

2021

cea

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Use of composite RCC deck over steel bridges has now significantly increased. The detailed experimental study was conducted to ascertain improvements due to composite RCC deck over non-composite bridge model. Deck type steel bridge models, with and without composite decks were tested in laboratory up to failure. The failure in non-composite model was observed due to buckling of top chord member at a stress of 234.6 N/mm 2 , whereas for the model with composite deck it changed to rupture of the bottom chord in tension at a stress of 614.8 N/mm 2 . Failure load and stiffness of the structure also increased significantly due to the composite action. Shear connectors designed as per IRC 22:2008 transferred the shear effectively and deck slab also participated in load sharing. Further, load sharing in the top chord compression member comprising the steel top chord, the concrete in the deck slab, and the reinforcing steel in it, was also explored. It is found that 72.0% of the composite top chord compressive force is taken by the RCC deck, and in the RCC deck 30.7% force is taken by the reinforcement. Strain variation in deck slab was also recorded using strain gauges. Strain in deck slab over top chord members was observed to be 54% more than the strain in the middle of the deck slab.

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“…Bottom chord tension members and laterally supported top chord compression members of composite truss can take load up to their ultimate strength provided the web compression members are designed with sufficient load factor to prevent their failure [3], [4]. In the Czech Republic twelve simply supported composite truss bridge systems with spans ranging from 21m to 63 m were built in last decade [5]. The Nantenbach Bridge [6] in Germany has a span of 83.2 m+208 m+83.2 m. It is a composite truss bridge with variable depth.…”

Section: Introductionmentioning

confidence: 99%

Analytical Comparison of Composite and Non-Composite through Type and Deck Type Steel Truss Bridges

Sharma¹,

Pathak²,

Singh³

2021

cea

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In trusses, deck type and through type truss systems are generally provided with various member arrangements. To utilize the materials used in the trusses more efficiently, RCC decks are nowadays made composite with the truss members. In this paper, analysis of 72.0 m deck type and through type, non-composite and composite bridges is presented. The bridges are modelled using STAAD. Pro v8i software with truss members as beam element and deck slab modelled as four noded plate element. The loading on the bridge is done as per the provisions of IRC-6 and IRC-24. The composite deck effectively reduces the horizontal deflections due to lateral seismic and wind loads in both the truss systems. Decrement in vertical deflection of the truss system was also observed making the structure mode stiffer. Stresses in the members made composite with the deck slab were also reduced and hence resulted in material saving and decreased steel offtake. In the case of composite deck type bridges due to load sharing by the deck slab, the stresses in the top chord are reduced significantly hence eliminating the chances of buckling. Advantages of composite deck are better utilized in deck type bridge system compared to through type bridge system.

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Design of Shear Connection between Steel Truss and Concrete Slab

Cited by 7 publications

References 11 publications

Study on Shear Connection of Bridge Steel Truss and Concrete Slab Deck

Study on Shear Connection of Bridge Steel Truss and Concrete Slab Deck

Experimental Investigation of Non-composite and Composite Deck Bridges

Analytical Comparison of Composite and Non-Composite through Type and Deck Type Steel Truss Bridges

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