Estimating Formulas of Strength and Deformation Capacity of Steel Bridge Pier Model Under Cyclic Loading.

A novel steel box bridge pier with replaceable energy dissipation wall plates at the base was proposed. After moderate earthquakes, the damaged energy dissipation wall plates and constraining steel plates on the two sides could be rapidly replaced, while the entire energy-dissipated column at the base can also be replaced after rare earthquakes. In this way, the seismic capacity of the new type of steel box bridge pier could be restored after earthquakes. For the purpose of discussing the seismic performance of this novel steel box-shaped bridge pier, the pseudostatic test and numerical simulation were performed. The results showed that the failure of the specimens in the pseudostatic tests occurred predominantly in the energy dissipation zone at the base. After replacing the damaged energy-dissipated column at the base, the seismic behavior of the proposed steel bridge pier can be recovered rapidly. Axial compression ratio is an important factor influencing the seismic behavior of the novel steel box bridge pier. The strength of the energy dissipation wall plates influences the novel steel box-shaped bridge pier’s bearing capacity and deformation capacity. Spacing between the horizontal stiffening ribs had little impact on the bearing capacity and deformation capacity of the proposed steel bridge pier. The larger the thickness of the energy dissipation wall plate, the higher the bearing capacity and deformation capacity of the steel box bridge pier. Finally, an empirical equation for the design of this novel steel bridge pier under cyclic loading was proposed.

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Effects of correction by heating/pressing on mechanical behavior of steel bridge pier

International Journal of Steel Structures ◽

10.1007/bf03249482 ◽

2009 ◽

Vol 9 (1) ◽

pp. 77-83

Author(s):

Mikihito Hirohata ◽

Takuya Morimoto ◽

You-Chul Kim

Keyword(s):

Mechanical Behavior ◽

Bridge Pier ◽

Steel Bridge

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Effect of Detailed Formations on the In-Plane Shear Capacity of Hairpin Connectors in Precast RC Floor Slabs

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.163-167.1510 ◽

2010 ◽

Vol 163-167 ◽

pp. 1510-1514 ◽

Cited By ~ 1

Author(s):

Rui Pang ◽

Shu Ting Liang ◽

Xiao Jun Zhu ◽

Yao Meng

Keyword(s):

Simulation Analysis ◽

Plate Thickness ◽

Shear Capacity ◽

Steel Plates ◽

Strong Impact ◽

Deformation Capacity ◽

Initial Stiffness ◽

Plane Shear ◽

Floor Slabs ◽

Strength And Deformation

Detailed formation of precast floor slab connectors has significant effect on their shear capacity, but there is no such specific provision on it at present. The effects of detailed formations on the shear strength, stiffness and deformation capacity of hairpin connectors(HPC) were studied, through numerical simulation analysis under in-plane shear force. The imbedded depth (d), slug length (h), steel plate thickness (t) and its stickout(s) were taken as parameters. The analysis results show that: ⅰ) the increase of imbedded depth can improve the bearing capacity and stiffness of HPC, but decrease the deformation capacity; ⅱ) with the increase of slug length, the HPC strength, stiffness and deformation capacity raised a lot; ⅲ) the steel plates’ thickness has small effect on the stiffness, but has strong impact on the strength and deformation capacity of HPC. ⅳ) the stickout can affect the initial stiffness and yield strength of HPC slightly, but has a considerable impact on its ultimate strength and deformation capacity. On the basis of analysis, recommendations on formation details of HPC are proposed for design and construction.

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