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http://dx.doi.org/10.1007/s13296-018-0122-y

In-Plane Stability of Concrete-Filled Steel Tubular Parabolic Truss Arches  

Liu, Changyong (Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology)
Hu, Qing (School of Civil Engineering, Harbin Institute of Technology)
Wang, Yuyin (Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology)
Zhang, Sumei (Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology)
Publication Information
International journal of steel structures / v.18, no.4, 2018 , pp. 1306-1317 More about this Journal
Abstract
For determining the in-plane buckling resistance of a concrete-filled steel tubular (CFST) arch, the current technical code GB50923-2013 specifies the use of an equivalent beam-column method which ignores the effect of rise-to-span ratio. This may induce a gap between the calculated result and actual stability capacity. In this study, a FE model is used to predict the buckling behavior of CFST truss arches subjected to uniformly distributed loads. The influence of rise-to-span ratio on the capacity of truss arches is investigated, and it is found that the stability capacity reduces as rise-to-span ratio declines. Besides, the calculations of equivalent slenderness ratio for different truss sections are made to consider the effect of shear deformation. Moreover, based on FE results, a new design equation is proposed to predict the in-plane strength of CFST parabolic truss arches under uniformly distributed loads.
Keywords
Concrete-filled steel tube; Truss arch; In-plane stability; Rise-to-span ratio; Shear deformation;
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