Citlivost ocelového rovinného rámu na imperfekce

Sensitivity of Plane Steel Frames to Imperfections

článek v časopise - ostatní, Jost

čeština

V článku se popisuje vliv imperfekcí na únosnost rovinného ocelového rámu. Imperfekce se při tom uvažují jako náhodné (stochastické) veličiny. Účelem této studie je pokusit se posoudit relativní citlivost náhodné proměnlivosti sledovaného jevu (únosnosti) na náhodnou proměnlivost jednotlivých vstupních veličin (imperfekcí).

An imperfections influence on the carrying capacity of a steel plane frame is described. An imperfections are considered as the random (stochastic) variables. An assessment of the relative sensitivity of a random investigation phenomenon variability (carrying capacity) on the random variability of individual input quantities (imperfections) is provided. The geometrically and physically non-linear solution was chosen for an analysis model of the numeric simulation Mount Carl method. An imperfections influence was studied on frames, displayed on Pit. 7 and 8. The provided study proves, that the variability of the output quantity (carrying capacity) is mostly influenced by the variability of a material yield strength and the variability of flange thickness of both props. The initial rotation of both props of the frame No.1 has the big influence on a carrying capacity, see Pict.2 and 3. These input random quantities should be focused at investigation of statistic parameters and the distribution probability type and further at manufacturing and assembly check of a structure. The residual stress influence on the carrying capacity is relatively small for both examples.

Imperfekce, únosnost, rám, náhodné, citlivost

Imperfections, steel, frame, random, stochastic, variables, geometrically and physically non-linear solution, Monte Carlo method, yield strength, carrying capacity, residual stress.

KALA, Z.

2002

1. 5. 1998

1210-4027

Stavební obzor

98

5

Česká republika

145

148

4