Additionally, this study evaluated the interface shear-friction provisions in ACI 318鈥 19, AASHTO LRFD 2020, Eurocode 2 and CSA S6: 19, when applied to the new UHPC-CA shear key. Push-through test results indicate that, utilizing UHPC-CA as the grouting material, using groove surfaces, ...
This angle does not depend on the state of stress; it is influenced by a rock property known as cohesion or internal friction. Thus, shear fractures do not form parallel to the plane of maximum shear stress (always precisely at 45° to σMAX and parallel to σINT), which may seem ...
According to the ACI 318–19 [31], for calculating punching shear strength \(({V}_{n})\), as shown in Eq. (2), three other parameters are needed to be known:\({\alpha }_{s}\) a fixed value determined by the position of the supporting column (40 for interior columns, 30 for...
The shear strength of web reinforcement in the deep beams is derived from the shear friction concept, where the sole function of the shear reinforcement is to develop compression force across a slip plane, thereby providing a clamping action (ACI 318 1999). The shear strength of the web ...
May 19, 2014 #2 TXStructural Structural Jan 10, 2007 1,033 You absolutely have to develop whatever connection you have between the old and new in order to use shear friction. Since you are only doing one of these, do not get too concerned about the depths of the embedded bars or ...
[57], where the two stress components are evaluated along the unit crack area as:(14a)σca=−σp(A¯x−μA¯y)≤0(14b)τca=σp(μA¯x+A¯y)where μ is the co-efficient of friction between the aggregate granules and the cement paste (taken as 0.4) and σp is the ...
surface-to-surface interaction with tangential behaviour defined by a friction coefficient of 0.5 was assigned between rollers and concrete element. The friction confection between steel and concrete varies between 0.2 and 0.8, depending on the loading mechanism and test set-up, and values around 0.5...
the surface roughness of steel fiber controls the chemical adhesion and physical friction at the initial bond-slip performance, and the deformed geometry of steel fiber provides the mechanical anchorage to resist the slip of fiber opposite to the concrete matrix. Therefore, the fiber with a rough ...
In contrast to the model included in ACI 318 [2], the shear force provided by the shear friction VR,cc in DIN EC 2/NA [32] is not equal to the diagonal cracking load VR,c. Besides, the angle of the inclined shear cracks βr, and thus the shear resistance provided by stirrups Vs...
With the filling of the bolt-to-hole clearances, this slip plateau was avoided, resulting in a larger shear stiffness [19]. Additionally, the friction-grip bolts showed higher initial stiffness than other types of bolt shear connector, because the shear force was transferred mainly by friction ...