EK670
An additional compressive stress acting perpendicular to the interface activates the load bearing mechanism of friction. After adhesive bond is exceeded and cracks develop along the interface, the compressive stress […]
EK619
In structures subject to a very large number of cycles of fluctuating load, typically at least 100000 load applications, failure may occur by the continued growth of cracks in the […]
EK564
As loading increases, extensive microcracking intersects primary and secondary cracks and may create cracked zone. Eventually, transfer of a tensile concrete force to the steel becomes ineffective.
EK531
When a ring in the concrete surrounding the bar is stressed to rupture, it breaks and longitudinal (splitting) cracks appear on the concrete surface.
EK463
Contraction joints are used mainly to control locations of cracks caused by shrinkage of concrete after it has hardened.
EK335
Some brittle materials, such as cast-iron and concrete, contain large numbers of microscopic cracks in their structures. These are believed to give rise to high stress concentrations, thereby causing local […]
EK310
The concept of the space truss analogy is based on the assumption that the torsional capacity of a reinforced concrete rectangular section is derived from the reinforcement and the concrete […]
EK136
At low temperatures the energy absorbtion is low and initiation and propagation of brittle fractures are comparatively easy, while at high temperatures the energy absorbtion is high because of ductile […]
EK135
More serious are cracks which propagate at high speed in a brittle (or unstable) fashion, for which some of the internal elastic strain energy stored in steel is released and […]
EK120
Torsional moments produce shear stresses which result in principal tensile stresses inclined at approximately 45 degrees to the longitudinal axis of the member. Diagonal cracking occurs when these tensile stresses […]
EK66
Although tension stiffening has a minor influence on flexural strength, additional stiffness is provided at all sections, except right at the cracks, and this has a significant effect in decreasing […]
EK65
Tension stiffening in a flexural member is the additional stiffness provided by the tensile stress in the concrete between primary flexural cracks.