Longitudinal shear transmission of anchor channels into concrete—An experimental approach

Konertz, Dustin; Kocur, Georg Karl; Häusler, Frank; Mark, Peter

doi:10.1002/suco.202000133

Cited by 10 publications

(14 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These anchor channel-channel bolt-systems can take up high tension loads (N in z-direction) and shear loads (V in x-and y-direction) by mechanical interlock, making the system very robust and even suitable to withstand explosive loads, seismic loads, and fatigue loads [18].…”

Section: Anchor Channel Systemsmentioning

confidence: 99%

Cast – in anchor channels used to support curtain wall facades – numerical study of additional anchor reinforcement

Ciascai,

Toader,

Mircea

et al. 2022

MATEC Web Conf.

View full text Add to dashboard Cite

As the architectural trend for ever greater spans for glass framing elements keeps its momentum, we are dealing with larger reaction loads onto the elements connecting these to the concrete slab, respectively onto the anchoring system. Therefore, this numerical study has the scope of researching the use of standard cast-in anchor channels, commonly used to support curtain wall façade systems, that are positioned and cast-in relatively close to the edge of the reinforced concrete slab; as well as researching the evolution of the relationship between the concrete strength, slab thickness, anchorage length, the distances between the anchors, the T-bolt positioning, (lever arm of shear force on t-bolt), and the geometry of the “ski plates”. Whilst many studies have been performed regarding the performance of both the concrete and these fastening systems, there is not sufficient information/classification relating to the influence of the welded “skis “, and as to what the optimal sizes and geometries are, when used in a class of concrete where this is critical. The main conclusion desired to be achieved is to find the optimal reinforcement plate (ski) shape and position for the given concrete and anchorage depth, allowing for a more accurate connection design, and to provide options for the instances where clashes occur.

show abstract

Section: Anchor Channel Systemsmentioning

confidence: 99%

Cast – in anchor channels used to support curtain wall facades – numerical study of additional anchor reinforcement

Ciascai,

Toader,

Mircea

et al. 2022

MATEC Web Conf.

View full text Add to dashboard Cite

show abstract

“…If such direct contact is avoided (cf. 39 ), the use of cyanoacrylate is the better choice due to its high stiffness and the associated accurate strain measurement. This knowledge can, therefore, be transferred analogously to steel component contexts.…”

Section: Fiber Optic Sensorsmentioning

confidence: 99%

A comparative evaluation of strain measurement techniques in reinforced concrete structures–A discussion of assembly, application, and accuracy

Clauß

Ahrens

Mark

2021

Structural Concrete

Self Cite

View full text Add to dashboard Cite

The measurement of strain in structural elements is a necessary means of investigating the condition of a structure, both in research and in practice. The measurement methods for recording strain considered in this work represent both well-established techniques (strain gauges), as well as techniques that are part of rather current research streams (fiber optic sensors, digital image correlation). This work's contribution lies in providing an overarching comparison of these approaches, thereby informing practitioners and researchers as to parameters concerning their assembly, application, and their accuracy. To such ends, two test series were carried out, one on RC tension rods and another on a RC beam in a four-point bending test. From the latter scenario, for example, certain generalizations were to be deduced for varying load levels: low strains are measured well using the fiber optic technique. Conversely, digital image correlation was discovered to be an adequate choice when assessing higher strain levels and concomitant concrete cracking, as this non-contact technique avoids imprecisions caused by adhesives. Findings are to assist the future user by contrasting the three techniques in terms of assembly, handling, application and resilience of sensors, external influences as well as measurement resolution and accuracy. Such practice-oriented remarks should simplify a selection of the suitable measurement techniques catering to the respective, context-dependent testing scenario.

show abstract

“…Here, a measuring campaign is used employing fiber‐optic sensing (FOS). FOS allows a quasi‐continuous measurement—every millimeter—along the fiber 38,39 . Fibers are placed along the longitudinal direction to gain a fine discretization of temperature data in x direction (“structural level”).…”

Section: Steering Of Moments By Temperature Inductionmentioning

confidence: 99%

Strengthening of beams or slabs using temperature induction

Löschmann

Mark

2021

Structural Concrete

View full text Add to dashboard Cite

Several aged reinforced concrete (RC) structures need to be strengthened. A typical method is to subsequently add rebar into slots filled with bonding mortar. However, this kind of strengthening only acts for live loads, not for dead loads, if no prestressing or prior lifting is applied. To overcome this deficiency, a novel method is presented. It activates the postinstalled reinforcement for all types of loading by temporarily inducing temperature from the outside. Doing so, statically indeterminate structures are locally relieved from stresses by constraint moments from systematically induced vertical temperature gradients during strengthening. To set the size of the gradients, the nonlinear material behavior, especially the significant reductions in constraint forces due to softening, is taken into account. If tempering is stopped after strengthening, stresses from dead loads redistribute over the newly formed total cross section. The method is theoretically derived, discussed, and verified in the lab on a two‐span RC girder. It turns out appropriate to enhance the bending resistance of beams or slabs.

show abstract

Longitudinal shear transmission of anchor channels into concrete—An experimental approach

Cited by 10 publications

References 14 publications

Cast – in anchor channels used to support curtain wall facades – numerical study of additional anchor reinforcement

Cast – in anchor channels used to support curtain wall facades – numerical study of additional anchor reinforcement

A comparative evaluation of strain measurement techniques in reinforced concrete structures–A discussion of assembly, application, and accuracy

Strengthening of beams or slabs using temperature induction

Contact Info

Product

Resources

About