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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:

2006年01期

Page:

29-33

Research Field:

Publishing date:

2006-03-20

Info

Title:

Experimental Research on Concrete-Filled Steel Tube Truss Girder Under Bending

Author(s):

HUANG Wen-jin¹; 2;  CHEN Bao-chun¹

1. School of Civil Engineering and Architecture, Fuzhou University, Fuzhou 350002, Fujian, China; 2. School of Transportation, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China

Keywords:

concrete-filled steel tube;  truss girder;  experimental research;  ultimate load capacity;  tubular joint

PACS:

U528.59

DOI:

-

Abstract:

In order to make further investigation into the global action of concrete-filled steel tube(CFST)truss girder, experiment of CFST truss girder specimen under symmetrically quarter loading was carried out. Specimen of CFST truss girder was fabricated according to dimensions of stiffening girder and truss arch rib of several built bridges and code for design of steel tube structure. Based on the measured deflection and strain of specimen during experiment, the deformation, strain increasing mode of steel tube, failure mode and load-carrying capacity of joints as well as the whole girder were analyzed. The test result shows that deflection of CFST truss girder is mainly attributed to deformation of shear-bending parts and much smaller than that of solid web girder. The behaviors of joints are complex and its ultimate load capacity will control that of the truss girder. Filled concrete in the chord tubes can increase the member's radial rigidity and keep it from plastic failure thus strengthens the joints. Under the symmetrically quarter loading, axial forces in web members for CFST welding truss girder are commonly less than that of hinged truss, and the chord members are subjected to prominent bending moment. Before the failure of joints, obvious shear deformation among web members can be observed during shearing-bending parts.

References:

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Memo

Memo:

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Common functions

Last Update: 2006-03-20