TY - JOUR N2 - Civil engineering is one of the many fields of occurrences of uncertain parameters. The present paper in an attempt to present and describe the most common methods used for inclusions of uncertain parameters . These methods can be applied in the area of civil engineering as well as for a larger domain. Definitions and short explanations of methods based on probability, interval analysis, fuzzy sets, and convex sets are presented. Selected advantages, disadvantages, and the most common fields of implementation are indicated. An example of a cantilever beam presented in this paper shows the main differences between the methods. Results of the performed analysis indicate that the use of convex sets allows us to obtain an accuracy of results similar to stochastic models. At the same time, the computational speed characteristic for interval methods is maintained. L1 - http://www.czasopisma.pan.pl/Content/115626/PDF-MASTER/19II_ace-2018-0059.pdf L2 - http://www.czasopisma.pan.pl/Content/115626 PY - 2018 IS - No 4/II EP - 19 KW - uncertainty KW - convex set KW - interval KW - probability KW - fuzzy set A1 - Pełczyński, J. PB - WARSAW UNIVERSITY OF TECHNOLOGY FACULTY OF CIVIL ENGINEERING and COMMITTEE FOR CIVIL ENGINEERING POLISH ACADEMY OF SCIENCES VL - Vol. 64 DA - 15.12.2018 T1 - On mathematical descriptions of uncertain parameters in engineering structures SP - 3 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/115626 T2 - Archives of Civil Engineering ER -