Failure pattern and load distribution mechanism of stiffeners in the tube–gusset plate connection: Testing, numerical modelling and theoretical analysis

A novel friction damping system for the aseismic design of framed buildings has been proposed by Canadian researchers. The system has been shown experimentally to perform very well and is an exciting development in earthquake resistant design.The design of a building equipped with the friction damping system is achieved by determining the optimum slip load distribution to minimize structural response. The optimum slip load distribution is usually determined using the general nonlinear dynamic computer program DRAIN-2D, which requires extensive computer time and is not practical for most design offices.This paper describes a new, efficient, numerical modelling approach for the design of friction damped braced frames. The hysteretic properties of the friction devices are derived theoretically and included in a friction damped braced frame analysis program, which is adaptable to a microcomputer environment. The optimum slip load distribution is determined by minimizing a relative performance index derived from energy concepts. The new numerical approach is much more economical to use than DRAIN-2D and is of great value for the practical design of friction damped braced frames. Key words: braced frames, brake lining, performance index, damping, dynamics, earthquakes, energy, friction.

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Test and Analysis on the Longitudinal Gusset Plate Connection to Circular Hollow Section (CHS) of High Strength

Journal of Korean Society of Steel Construction ◽

10.7781/kjoss.2012.24.1.035 ◽

2012 ◽

Vol 24 (1) ◽

pp. 35-46 ◽

Cited By ~ 3

Author(s):

Swoo-Heon Lee ◽

Kyung-Jae Shin ◽

Hee-Du Lee ◽

Woo-Bum Kim

Keyword(s):

High Strength ◽

Gusset Plate ◽

Hollow Section ◽

Circular Hollow Section ◽

Plate Connection

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Numerical Modelling of the Microstructure during Rolling of Flat Bars

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.165.382 ◽

2010 ◽

Vol 165 ◽

pp. 382-387

Author(s):

Piotr Szota ◽

Andrzej Stefanik ◽

Henryk Dyja

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Theoretical Analysis ◽

Numerical Modelling ◽

Computer Software ◽

Rolling Process ◽

Accelerated Cooling ◽

Bar Rolling ◽

Proposed Modification ◽

Rolling Technology

This paper presents theoretical analysis of microstructure changes in the material during standard rolling and normalizing rolling of the 35x20 mm flat bars. The analysis was carried out by means of computer software Forge 2007® that is based on finite element method. Two cases of accelerated cooling during rolling process were considered. Numerical results of 35x20 mm flat bars rolling process allowed to determine the average recrystallized austenite diameter as well as basis energy and force parameters. Proposed modification of the 35x20 mm flat bar rolling technology with accelerated cooling results in the reduction of average austenite diameter, which could improve the strength of the final product.

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