PSI - Issue 13

Petr Lehner et al. / Procedia Structural Integrity 13 (2018) 1539–1544 Lehner P., K ř ivý V., Krejsa M., Pa ř enica P., / Structural Integrity Procedia 00 (2018) 000–000

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3. Discussion and conclusions The article presents a complex analysis of the steel structure loaded by the overhead crane. First, the assessment of the entire construction was made and the overall model was created. After the appreciation of the inner forces, the most stressed element - the diagonal - was chosen. The influence line of the load of the crane was determined on the diagonal. Subsequently, a stochastic estimate of the impact on the diagonal in one working day was prepared - the amplitude of load history. This effect was included in the diagonal connection calculation, which was assessed for fatigue damage using S-N curves. In terms of service life, the gusset plate has the lowest resistance. On the other hand, the rivet is very durable. It should be noted the modeling presented here involves many simplifications. In the first place, load submissions are introduced, which may not correspond to the reality of the load over the past 100 years. Furthermore, only an exemplary case with a simplified combination of results is shown. It is also appropriate to prepare a load cycle corresponding to months or years and to include it in a new calculation. An overall analysis can be used to identify a critical location where a dangerous fatigue crack in the material could occur. It may be the subject of a laboratory test of a sample taken from the steel structure. Acknowledgements This contribution has been developed as a part of the research project GACR 17-01589S “Advanced computational and probabilistic modelling of steel structures taking account fatigue damage” supported by the Czech Grant Agency and also has been completed thanks to the financial support provided to VSB-Technical University of Ostrava by the Czech Ministry of Education, Youth and Sports from the budget for conceptual development of science, research and innovations for the year 2018. References ANSYS, 2016. ANSYS Meshing User’s Guide. ANSYS User Guide. 15317(January), 514. Ghosh, P. et al. , 2017. Probabilistic time-dependent sensitivity analysis of HPC bridge deck exposed to chlorides. Computers and Concrete. 19(3), 305–313. Kala, Z., 2015. Sensitivity and reliability analyses of lateral-torsional buckling resistance of steel beams. Archives of Civil and Mechanical Engineering. 15(4), 1098–1107. Králik, J., 2017. Experimental and Numerical Analysis of the Hermetic Tightness of NPP Bubble Tower Structure. Procedia Engineering. 190, 472–479. Krejsa, M. et al. , 2017. Using DOProC method in reliability assessment of steel elements exposed to fatigue. MATEC Web of Conferences. 107, 00046. Scia Engineering, online dokumentation , no date. Available at: https://www.scia.net/en/support/downloads/scia-engineer-manuals-tutorials. Seitl, S. et al. , 2017. Effect of rivet holes on calibration curves for edge cracks under various loading types in steel bridge structure. Procedia Structural Integrity. 5, 697–704. Vičan, J. et al. , 2016. Analysis of Existing Steel Railway Bridges. Procedia Engineering. 156, 507–514. Xiang, Y. and Liu, Y., 2011. Application of inverse first-order reliability method for probabilistic fatigue life prediction. Probabilistic Engineering Mechanics. 26(2), 148–156. Ye, X. W., Su, Y. H. and Han, J. P., 2014. A state-of-the-art review on fatigue life assessment of steel bridges. Mathematical Problems in Engineering. 2014, 1–13. Zhang, R. and Mahadevan, S., 2001. Fatigue Reliability analysis using nondestructive inspection. Journal of Structural Engineering. 127(8), 957– 965.