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The aim of the article is to present the author’s proposals of calculating concrete ultimate direct shear strength fctb and fatigue direct shear strength fctbf. The effect of scale, important in investigating concrete strength, has been taken into account. The conclusions are valid for concrete class B 30–B 50, hole diameter ř = 20–40 mm and strip thickness t = 12–20 mm. The doubts about the diameter...
Research on bond under cyclic loading is usually performed using specimens of a very short bond length. Results of such a research show very often that bond can be completely destroyed. According to that, most standards demand some extra anchorage length of steel bars. Different results were obtained by the author from experiments on long specimens under eccentric tension. If a concrete member is...
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