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Structural Engineering and Mechanics Volume 37, Number 4, February25 2011, pages 385-399 DOI: http://dx.doi.org/10.12989/sem.2011.37.4.385 |
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Experimentally validated FEA models of HF2V damage free steel connections for use in full structural analyses |
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Jonathan Desombre, Geoffrey W. Rodgers, Gregory A. MacRae, Timon Rabczuk, Rajesh P. Dhakal and J. Geoffrey Chase
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| Abstract | ||
| The aim of this research is to model the behaviour of recently developed high force to volume (HF2V) passive energy dissipation devices using a simple finite element (FE) model. Thus, the end result will be suitable for use in a standard FE code to enable computationally fast and efficient analysis and design. Two models are developed. First, a detailed axial model that models an experimental setup is created to validate the approach versus experimental results. Second, a computationally and geometrically simpler equivalent rotational hinge element model is presented. Both models are created in ABAQUS, a standard nonlinear FE code. The elastic, plastic and damping properties of the elements used to model the HF2V devices are based on results from a series of quasi-static force-displacement loops and velocity based tests of these HF2V devices. Comparison of the FE model results with the experimental results from a half scale steel beam-column sub-assembly are within 10% error. The rotational model matches the output of the more complex and computationally expensive axial element model. The simpler model will allow computationally efficient non-linear analysis of large structures with many degrees of freedom, while the more complex and physically accurate axial model will allow detailed analysis of joint connection architecture. Their high correlation to experimental results helps better guarantee the fidelity of the results of such investigations. | ||
| Key Words | ||
| damage avoidance design; DAD; HF2V; damping; high-force-to-volume; finite element analysis; supplemental damping; experimental; energy dissipation. | ||
| Address | ||
| Jonathan Desombre: Department of Mechanical Engineering, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand Geoffrey W. Rodgers: Department of Mechanical Engineering, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand Gregory A. MacRae: Department of Civil Engineering, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand Timon Rabczuk: Department of Mechanical Engineering, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand Rajesh P. Dhakal: Department of Civil Engineering, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand J. Geoffrey Chase: Department of Mechanical Engineering, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand | ||