On Minimum Reinforcement in Concrete Structures

摘要: The usual criteria to fix minimum reinforcement in concrete structures require first, that the cross section of be dimensioned so tensile stresses acting on ``embedment section'' concrete, when concentrated steel after cracking, do not exceed its elastic limit, and second, crack width kept within established limits. But these rules neglect some important aspects as soon cracking provokes significant redistribution stresses. incidence redundancy is decisive presence imposed deformations. An interesting example case a well which thermohygrometric effects generates diffused state tension. From finite elements analysis it appears that, mid-vertical section, limited opening enduces marked relaxation, sum along being much smaller than before formation. This result suggests idea replace evenly distributed bars with series well-reinforced chords (or...