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Structural Engineering and Mechanics Volume 58, Number 2, April25 2016 , pages 231-242 DOI: https://doi.org/10.12989/sem.2016.58.2.231 |
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Topology optimization of bracing systems using a truss-like material model |
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Kemin Zhou
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| Abstract | ||
| To minimize the compliance of frame, a method to optimize the topology of bracing system in a frame is presented. The frame is first filled uniformly with a truss-like continuum, in which there are an infinite number of members. The frame and truss-like continuum are analysed by the finite element method altogether. By optimizing the distribution of members in the truss-like continuum over the whole design domain, the optimal bracing pattern is determined. As a result, the frame\'s lateral stiffness is enforced. Structural compliance and displacement are decreased greatly with a smaller increase in material volume. Since optimal bracing systems are described by the distribution field of members, rather than by elements, fewer elements are needed to establish the detailed structure. Furthermore, no numerical instability exists. Therefore it has high calculation effectiveness. | ||
| Key Words | ||
| topology optimization; compliance; bracing systems; truss-like continuum; lateral stiffness | ||
| Address | ||
| Kemin Zhou: College of Civil Engineering, Huaqiao University, Fujian, 361021, China | ||