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| Redundancy of single-layer reticulated dome based on strain response sensitivity |
| Received:June 28, 2012 Revised:March 06, 2013 |
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| DOI：10.7511/jslx201306006 |
| KeyWord:single-layer reticulated dome strain response sensitivity structure component redundancy |
| Author | Institution |
| 花晶晶 |
东南大学 混凝土及预应力混凝土结构教育部重点实验室, 南京 |
| 叶继红 |
东南大学 混凝土及预应力混凝土结构教育部重点实验室, 南京 |
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| Abstract: |
| Redundancy is an important part of structural robustness.It reflects the safety of complex system and the reliability of the force transmission path.Nevertheless,it should be remarked that there is,as yet,neither a uniform theory of structural redundancy nor any widely agreed definitions in structural engineering.In this paper,the P.C.Pandey method is referenced and applied to long-span space latticed structure.A method,in which the derivation of element strain to the cross-sectional area of elements is taken as the response sensitivity,is proposed based on the response sensitivity to assess the redundancy of structure under static load.It is illustrated that the method can be applied in space structure effectively via three examples.Numerical results show that the redundancy can reflect the importance of structural component.Structural elements with low redundancies are the key components of the structure.Taking measures to reinforce the components with small redundancies can efficiently improve both the whole stiffness and the ultimate bearing capacity of the structure,while it depends on the concrete situation whether the imperfection sensitivity is ameliorated. |
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