Stability Analysis for CFST Basket Handle Arch Bridge

Xing, Fan; Zhu, Bing; Wang, Xiaoping

doi:10.1061/41039(345)228

Cited by 1 publication

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“…Among them, in terms of strength and stiffness, Qu et al (2011) and Lee et al (2013) considered that the use of concrete-filled steel tube material for arch ribs can give full play to the respective advantages of steel and concrete to make up for each other's shortcomings, which is an effective way to achieve a breakthrough in long-span arch bridge in the future. For example, Pingnan Third Bridge (Xie et al, 2021), the largest arch bridge in the world, has a span of 575 m. In terms of stability, experts mainly studied the parameters of arch rib transverse braces, arch rib inclination angle, wall thickness of arch rib steel pipe, rise span ratio, arch axis coefficient, etc., and the results can provide references for structural stability design (Cai et al, 2012;Liu et al, 2017;Xing et al, 2009). In terms of dynamic characteristics, Li et al (2008) mentioned that the crossbar has obvious influence on the dynamic and stabilization characteristics of the bridge.…”

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confidence: 94%

Structural form and experimental research of truss arch bridge with multi-point elastic constraints

Qiu

Xie

Pang

et al. 2021

Advances in Structural Engineering

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With the increase of the arch bridge span, the mechanical properties of arch bridges will decrease rapidly. In order to solve this problem, triangular net is set between the arch rib and girder to form a kind of truss arch bridge in which arch rib acts as top chord, girder acts as lower chord, triangular net acts as web member, and hangers provide elastic restrains at several points. The triangle stability of the truss can improve linear stiffness of arch rib and girder, which will thus improve the mechanical properties of arch bridges. A test bridge with a span of 50 m was built to prove the superiority of the truss arch bridge with multi-point elastic constraints (MTAB). Structural stresses and displacements were obtained through dead load experiments, and the mechanical properties of the structure were calculated through the finite element (FE) software. It is turned out that, compared with the conventional through arch bridge (CTAB), the mechanical performance of the MTAB is greatly improved. The test values of structural stresses and displacements match calculation values well. Moreover, with the same steel consumption, the more layers of the triangular net, the better the mechanical properties of the structure.

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