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Title:

Experimental Fatigue Evaluation of Hybrid FRP-Concrete Bridge Truss Girders

Accession Number:

01516733

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

A novel hybrid bridge system comprising transversely spaced precast prestressed concrete truss girders and a concrete deck cast or placed on top has been developed. The girders have top and bottom concrete flanges connected by precast vertical and diagonal truss members made of glass fiber-reinforced polymer (GFRP) tubes filled with concrete. The vertical members, predominantly in compression, are connected to the concrete flanges by means of dowels. The diagonals, mainly in tension, are connected to the flanges using single-headed bars. The concrete flanges provide the flexural capacity of the girder while the truss members resist the shear forces. The flanges are pretensioned during fabrication. The girders may be post-tensioned by external tendons after erection to balance the slab weight and to provide continuity in multi-span bridges. All reinforcement and prestressing can be made of corrosion-resistant steel or glass and carbon FRP. The proposed truss girder is thus light in weight and durable. The light weight allows for longer spans and reduces the initial cost. The potential enhancement in durability reduces the maintenance cost and extends the structure’s life span. An experimental evaluation of the behavior of two-panel truss girders under static and fatigue loading is presented. A total of seven girder specimens were fabricated, of which six were tested under cyclic fatigue loading of different level and amplitude, and one was tested under monotonic loading for comparison. The post-fatigue resistance was also investigated. The test results have shown excellent performance of the truss girders under both static and fatigue loading.

Supplemental Notes:

This paper was sponsored by TRB committee AFF80 Structural Fiber Reinforced Polymers. Alternate title: Experimental Fatigue Evaluation of Hybrid Fiber-Reinforced Polymer-Concrete Bridge Truss Girders

Monograph Accession #:

01503729

Report/Paper Numbers:

14-5745

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Aghahassani, Mohammad
Elbadry, Mamdouh
Moravvej, Mohammad

Pagination:

14p

Publication Date:

2014

Conference:

Transportation Research Board 93rd Annual Meeting

Location: Washington DC
Date: 2014-1-12 to 2014-1-16
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; Photos; References; Tables

Subject Areas:

Bridges and other structures; Highways; I24: Design of Bridges and Retaining Walls

Source Data:

Transportation Research Board Annual Meeting 2014 Paper #14-5745

Files:

TRIS, TRB, ATRI

Created Date:

Jan 27 2014 4:00PM