Shells of cracked reinforced concrete chimneys, silos and cooling towers walls as a problem of durability exploitation
Abstract eng: There are presented in this paper some problems connected with reinforced concrete shell objects operation in the aggressive environment. Reinforced concrete chimneys, cool towers, silos and other shells were built for decades. Vitality i.e. durability of cracked shells are one of the most important parameters during process of designing, construction and exploitation of shells. Some reasons of appearance of horizontal and vertical cracks as temperature, pressure of stored material, live loads e. g.wind, dynamic character of wind, moisture, influence of construction joints, thermal insulation, chemistry active environmental etc. reduce the carrying capacity of the walls of the chimneys, silos, cool towers etc. Cracked surface of this constructions causes decreasing capacity and lower the state of reliability. Horizontal and vertical cracks can caused corrosion of concrete and steel bars, decreasing stiffness of contraction, bigger deflection, decreasing of carbonation of concrete cover. Horizontal and vertical cracks allow condensate water infiltrates into wall. It causes corrosion and dank of concrete wall and during winter time cracks become bigger because if glaciations water in cracks. Local and global imperfactions of concrete shells are increasing according to greater number of cracks. Taking into account these facts, cracks reduce the service life of reinforced concrete buildings. The technology of repairing cracked walls are presented in paper.
Publisher:
Taylor and Francis Group, London, UK
Conference Title:
Conference Title:
Sixth International Conference on Structural Engineering, Mechanics and Computation
Conference Venue:
Cape Town, South Africa
Conference Dates:
2016-09-05 / 2016-09-07
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.
Record appears in:
Record created 2016-09-20, last modified 2016-09-20
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