Anwendung der DASt-Richtlinie 022:2009-08 “Feuerverzinken von tragenden Stahlbauteilen” / . Application of the DASt-Richtlinie 022:2009-08 “Guideline for hot-dip-zinc-coating of prefabricated load-bearing steel components”

2010 ◽  
Vol 41 (4) ◽  
pp. 159-176 ◽  
Author(s):  
Markus Feldmann ◽  
Volker Hüller ◽  
Gerhard Sedlacek ◽  
Mark Huckshold ◽  
Dirk Schäfer ◽  
...  
Keyword(s):  
Zinc Coating ◽  
Bearing Steel ◽  
Load Bearing

scholarly journals Causes of Distortion during High Pressure Gas Quenching Process of Steel Parts

2019 ◽  
Author(s):  
Justin Sims ◽  
Zhichao Li ◽  
B. Lynn Ferguson
Keyword(s):  
High Pressure ◽  
Cooling Rate ◽  
Dimensional Change ◽  
Bearing Steel ◽  
Complex Behavior ◽  
Load Bearing ◽  
Quenching Process ◽  
Nonlinear Relation ◽  
Gas Quenching ◽  
Quench Hardening

Abstract Quench hardening is a necessary process for improving the mechanical and fatigue performance of load bearing steel components, but liquid quenching can lead to large distortions. High pressure gas quenching is becoming a more popular choice, with the assumption that a slower cooling rate will lead to less distortion. While true for certain geometries, nonlinearities in distortion response can make understanding the dimensional change of a component difficult due to the inherently complex behavior during quenching. Through the use of modeling, and a specially designed coupon, the out-of-round distortion of an eccentric bore is examined for common high-pressure gas quenching conditions. The causes of distortion are examined and explained using the model, with insights into why the cooling rate has a nonlinear relation with distortion.

Strength of wind load bearing wall stud-to-track connections

2002 ◽  
Vol 29 (5) ◽  
pp. 777-786
Author(s):  
Steven R Fox ◽  
Reinhold M Schuster
Keyword(s):  
Failure Modes ◽  
Wind Load ◽  
Bearing Steel ◽  
Load Bearing ◽  
Web Crippling ◽  
Modes Of Failure ◽  
Cold Formed Steel ◽  
Design Documents ◽  
Wall Assembly ◽  
Common Application

Cold-formed steel structural members are often used in building construction, with a common application being wind load bearing steel studs. The studs frame into horizontal steel track members at the top and bottom of the wall assembly, with the stud-to-track connection typically being made with self-drilling screws or welds. The design of the wall stud must include a check of the web crippling capacity at the end reactions. The type of end bearing that exists in these stud-to-track connections is not explicitly addressed by the current North American cold-formed steel design documents. Reported in this paper are the results and analysis of a collection of end-one-flange web crippling tests of common stud-to-track connections. The tests show that there are two failure modes: web crippling of the stud, and punch-through of the track flange. Design expressions are proposed to predict the capacity of the connection based on these two modes of failure. The effects of increasing the gap between the stud and the track and the effects of missing screws in the stud-to-track connection are also discussed.Key words: cold-formed steel, steel studs, structural design, connections, web crippling.

scholarly journals Fatigue life prediction of mechanical structures under stochastic loading

2018 ◽  
Vol 157 ◽  
pp. 02024 ◽  
Author(s):  
Bohuš Leitner ◽  
Lucia Figuli
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Residual Life ◽  
Steel Structure ◽  
Degradation Process ◽  
Bearing Steel ◽  
Damage Function ◽  
Operating Conditions ◽  
Fatigue Life Prediction ◽  
Load Bearing

Problems of fatigue life prediction of materials and structures are discussed in the paper. Service loading is assumed as a continuous loading process with possible discontinuous events, which are caused by various operating conditions. The damage in a material is due to a cumulative degradation process. The damaging process is then represented either by rain-flow matrices or by a fatigue damage function which is derived using some hypothesis of a fatigue failure criterion. Presented theoretical procedure enables a very effective estimation of a service life and/or reliable evaluation of residual life of any structures under various types of loading and environmental conditions. This approach creates a good basis for powerful expert systems in structural and mechanical engineering. The aim of the paper is to present briefly some results of analysis of load-bearing steel structure loads of special railway crane PKP 25/20i which was utilized in some specific ad relatively hard operating conditions. Virtual models of the structure were being used in an analysis of acting working dynamics loads influence to be able to forecast fatigue life of load-bearing of the crane jib.

Experimental study on the performance of a load-bearing steel stud gypsum board wall assembly exposed to a real fire

2011 ◽  
Vol 46 (8) ◽  
pp. 497-505 ◽  
Author(s):  
Seul-Hyun Park ◽  
Samuel L. Manzello ◽  
Matthew F. Bundy ◽  
Tensei Mizukami
Keyword(s):  
Experimental Study ◽  
Bearing Steel ◽  
Gypsum Board ◽  
Load Bearing ◽  
Wall Assembly ◽  
Steel Stud

Load-bearing steel structure diagnostics on bucket wheel excavator, for the purpose of failure prevention

2011 ◽  
Vol 18 (4) ◽  
pp. 1203-1211 ◽  
Author(s):  
Predrag D. Jovančić ◽  
Dragan Ignjatović ◽  
Miloš Tanasijević ◽  
Taško Maneski
Keyword(s):  
Steel Structure ◽  
Bearing Steel ◽  
Load Bearing ◽  
Failure Prevention

scholarly journals RECONSTRUCTION OF RESIDENTIAL BUILDINGS OF THE FIRST MASS SERIES WITH USE OF A HIGH-RISE SUPERSTRUCTURE OF STEEL

2021 ◽  
pp. 108-122
Author(s):  
V.T. Shalenny ◽  
S.F. Akimov ◽  
V.D. Malahov
Keyword(s):  
Experimental Research ◽  
Residential Buildings ◽  
Bearing Steel ◽  
Steel Frame ◽  
Load Bearing ◽  
High Rise ◽  
Economic Justification ◽  
Mass Development ◽  
The Cost

The article presents the results of theoretical and experimental research aimed at developing and improving structural and organizational and technological solutions in projects for the reconstruction of five-story residential buildings of mass development, developing and improving methods of economic justification, measures to reduce the cost of the two considered options, the comparison of which will increase the efficiency of this type of reconstruction using a load-bearing steel frame.

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