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2004•Journal of Southwest Jiaotong UniversityRequires access

Experimental Research of Shear Lag Effect of Cable-Stayed Bridge with Π Cross-Section Main Girder

Mao Xue-ming

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Abstract

A model for a prestressed concrete cable-stayed bridge with a Π cross-section main girder was established in a scale of one to five for a concrete cable-stayed bridge over the Jinsha River in Yibin City. The shear lag effect of this bridge was analyzed experimentally and was compared with the one obtained with the finite element method. The comparison shows the reliability of the experiment. The experimental result shows that for a cable-stayed bridge with a Π cross-section main girder, shear lag factor is greater at the fixed ends of its cantilevers than at its mid-span.

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What this paper is about

A model for a prestressed concrete cable-stayed bridge with a Π cross-section main girder was established in a scale of one to five for a concrete cable-stayed bridge over the Jinsha River in Yibin City. The shear lag effect of this bridge was analyzed experimentally and was compared with the one obtained with the finite element method. The comparison shows the reliability of the experiment. The experimental result shows that for a cable-stayed bridge with a Π cross-section main girder, shear lag factor is greater at the fixed ends of its cantilevers than at its mid-span.

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Available abstract

A model for a prestressed concrete cable-stayed bridge with a Π cross-section main girder was established in a scale of one to five for a concrete cable-stayed bridge over the Jinsha River in Yibin City. The shear lag effect of this bridge was analyzed experimentally and was compared with the one obtained with the finite element method. The comparison shows the reliability of the experiment. The experimental result shows that for a cable-stayed bridge with a Π cross-section main girder, shear lag factor is greater at the fixed ends of its cantilevers than at its mid-span.

Key concepts: Structural engineering, Lag, Girder, Bridge (graph theory), Prestressed concrete, Shear (geology), Cantilever, Finite element method

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