HEAT GENERATION IN ENERGY ABSORBERS OF SHEAR TYPE
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Abstract
Based on the analysis of literature sources, it is shown that steel energy absorbers using the active elements in the elastic-plastic and plastic stages of work can be used to protect massive bridge structures. The article proposes locations of elastic-plastic steel energy absorbers in span bridge structures and shows their energy efficiency. Experimentally, using laboratory samples made of low-carbon plastic steel, it has been proven that in the vicinity of structural and technological defects (holes, cutouts) in stretched and sheared elements of EA structures, localization of deformations occurres, especially at the elastic-plastic and plastic stages of steel work, with an increase in the average temperature of the steel surface during deformation by several tens of degrees (up to 90°С), which allows in the mode monitoring by the temperature field of the active element to control the performance of elements of steel span structures of bridges and energy absorbers.
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