Resistance of Steel Fasteners Subjected to Shear at Public Arenas in Normal and Fire Temperatures - Probabilistic Approach

• Autorzy: Domański T.

Identyfikatory

DOI

10.7862/rb.2018.20

• Języki publikacji: EN

Abstrakty

EN

The buildings with great grandstands are the public places where consequences of failure are very high. For this reason, according to EN 1990 they belong to CC3 class consequence of failure. The reliability class RC3 is associated with the consequences class CC3 [7, 8] and is defined by the β = 4.3 reliability index with probability of failure pf ≈ 8.54·10^-6. Shear connections have to transfer forces between structural members – steel body and bolts with adequate degree of safety. The load-carrying mechanism of bolted shear connections is complex and analytical methods for predicting the shear resistance are not applicable. Instead the resistance of the connections may be determined using empirical formulas. The distributions of horizontal and shear resistance within steel body - bolts will be described depending on material characteristics of steel body and bolts components. The characteristic resistance of steel shear connection is obtained as minimum of two variables: bolds resistance and steel body resistance. Probability function of this minima will be defined and described in this paper. Laboratory tests provide the only practicable basis for specifying safety margins for ultimate strength connections. The determination of partial safety factors within shear connections will be presented according to EN1990. Design value of such resistance is specified as suitable fractile of log- normal probability distribution, calculated with the assumption that the acceptable probability of down-crossing is not greater than pf,ult ≈ 2.91·10^-4. It means that the target reliability index, defined for the resistance, is taken as βR.req = 3.44, in accordance with the European recommendations (EN 1990).

Słowa kluczowe

EN

steel structures; structural safety; steel bolt connections; fire safety

• Wydawca: Oficyna Wydawnicza Politechniki Rzeszowskiej
• Czasopismo: Czasopismo Inżynierii Lądowej, Środowiska i Architektury / Journal of Civil Engineering, Environment and Architecture
• Rocznik: 2018
• Tom: z. 65, nr 2
• Strony: 17--24
• Opis fizyczny: Bibliogr. 10 poz., tab., wykr.

Twórcy

autor

Domański T.

• Cracow University of Technology, Chair of Metal Structures, ul. Warszawska 24, 31-155 Kraków

Bibliografia

• [1] Benjamin J., R., Cornell C., A., Probability, Statistics, and Decisions for Civil Engineers. Dover Publications Inc., Mineola, New York;2014.
• [2] Ditlevsen O.,Structural Reliability Methods, Wiley. New York 1996.
• [3] Domański T., Fire Safety Factors for Shear Stud Composite Beam Connections. Proc. Of 6th European Conference on Steel and Composite Structures EUROSTEEL. Budapest, Hungary , 2011.
• [4] Maślak M., Domański T., Safety factors in design of steel members for accidental fire situation, Proc of International Conference on Design, fabrication and Economy of Welded Structure. Miskolc, Hungary 24-26 April 2008. pp 563-570.
• [5] Nowak A., Collins K., R., Reliability of Structures, Mc Graw Hill Higher Education, Boston. New York, 2000.
• [6] Walpole R.E., Myers R.H., Myers S.L., Probability & Statistics for Engineers & Scientists, Prentice Hall.N.J.2002.
• [7] Woliński Sz., Global Safety Factor for Nonlinear Design of Concrete, Archives of Civil Engineering, LVII, 3, 2011.
• [8] EN 1990, Eurocode 0, Basis of structural design.
• [9] EN-1993-1-8, Eurocode 3, Design of steel structures - Design of joints.
• [10] EN-1993-1-2, Eurocode 3, Design of steel structures, General Rules, Structural fire design.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).