Shearing Property Study on PC Box-Girder Bridge with Corrugated Webs

PC box-girder bridge with corrugated webs is a new kind of bridge, which named by the thin steel webs replacing thick concrete webs. It is applied abroad in China recently, which attracts attention for its shearing property. Because of lacking relative design and construction code interiorly, the related data of Mi-Luo-Jiang bridge was used in the study with the software ANSYS 10.0. The shearing property and bucking stability of Mi-Luo-Jiang bridge were studied and a theory was verified: corrugated webs do not bear moment and axial force. Besides, the result that the decisive parameter of shearing property of Mi-Luo-Jiang bridge should be allowable shear stress is obtained. The other study had been done on buckling stability of box-girder bridge with different corrugated shapes, maintaining other parameters invariant. Finally, the optimal scope of lateral plane length is [0.2,0.4], and the optimal scope of folded angle is [20º,50º]. The parameters used in Mi-Luo-Jiang bridge is verified as the best value. This study is meaningful and the results can be applied in the design and construction of the same type bridge.

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Study on Diseases of Multi-Box Girder Bridge

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.446-449.1182 ◽

2012 ◽

Vol 446-449 ◽

pp. 1182-1185

Author(s):

Wen Liang Qiu ◽

Cai Liang Huang ◽

Zhao Yi Chen

Keyword(s):

Bearing Capacity ◽

Box Girders ◽

Load Bearing Capacity ◽

Box Girder ◽

Load Bearing ◽

Large Load ◽

Torsion Rigidity ◽

Box Girder Bridge ◽

Girder Bridge ◽

Design And Construction

Because the multi-box girder bridge has many advantages, such as large torsion rigidity, large load-bearing capacity, stability, fine appearance, good applicability and convenient construction, it is widely used in China. But for the defection existing in design and construction, many box girders have serious diseases. Aiming at the diseases of a viaduct bridge, the causes of diseases are analyzed and the enforcement method is proposed in this paper. The study shows that, though the box girders have large torsion rigidity, the diaphragms are designed necessarily to enhance the transversal connection between the box girders, to make them bear the loads together, to reduce their stresses and deformation, and to reduce the stresses of deck too.

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Sensitivity Analysis for Design Parameters of Cantilever Casting PC Box-Girder with Corrugated Steel Webs

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.430-432.1546 ◽

2012 ◽

Vol 430-432 ◽

pp. 1546-1550 ◽

Cited By ~ 1

Author(s):

Ke Bin Jiang ◽

Yong Ding ◽

Ya Wen Liu ◽

Ping Wang ◽

Feng Zheng

Keyword(s):

Design Parameters ◽

Bottom Plate ◽

Alignment Error ◽

Control Parameters ◽

Box Girder ◽

Optimization Principle ◽

Corrugated Webs ◽

Box Girder Bridge ◽

Girder Bridge ◽

Classical Construction

In order to provide a theoretical basis for the alignment regulation of prestressed box-girder bridge with corrugated webs, so that the control for alignment can be more targeted. Optimization model of alignment regulation for cantilever constructed pre-stressed box-girder bridge with corrugated webs is proposed based on optimization principle. The sensitivity of alignment error, transverse stress of bottom plate and transverse deformation of corrugated web with respect to design parameters is analyzed during three classical construction stages. The results indicate that the concrete density, concrete elastic modulus, longitudinal and transverse pre-stress are key control parameters of alignment regulation; alignment error is not sensitive to the change of uniformly distributed temporary loads; the cantilever state at one fourth span is most sensitive to the change of design parameters.

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