Abstract
Based on the analysis of different factors' effect on the structural material cracking resistance after preliminary warm prestressing (WPS), a conclusion has been drawn that the existing calculation models used for WPS effect prediction are of limited value; this conclusion applies to the Chell model, which is very convenient for practical use, in particular. The testing results on cracking resistance are presented for the structural 15X2MFA steel (of different strengths) and 15X2HFMA steels, as well as a welding 10XMFT joint after WPS. Comparison of the experimental and calculated data showed the possibility of a practical application of the simplified Chell solution of the WPS effect on the structural steels cracking resistance in the wide range of loading up to the subcritical crack growth.
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