Field Measurements on Steel Girder Bridge with Skewed Supports Utilizing Lean-On Bracing

Many multigirder steel bridges built before the 1980s are experiencing distortion-induced fatigue cracking at diaphragm-girder connections. A means of eliminating the cyclic stresses that cause those fatigue problems is to remove the interior diaphragms (diaphragms not at the girder supports). The effects of removing all interior channel diaphragms from an existing simple-span bridge with rolled-steel girders were evaluated based on field measurements of girder stresses and deflections made before and after the diaphragms were taken out. Results from tests with trucks of known weight indicate that removing the diaphragms resulted in increases between 6 and 15 percent in the maximum bottom flange stresses experienced by the most heavily loaded girder. Results for loading by trucks of unknown weight in normal traffic indicate that the most heavily loaded girder may carry up to 17 percent more load as a result of removing the diaphragms.

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Pretest analysis of shake table response of a two-span steel girder bridge incorporating accelerated bridge construction connections

Frontiers of Structural and Civil Engineering ◽

10.1007/s11709-019-0590-y ◽

2019 ◽

Vol 14 (1) ◽

pp. 169-184

Author(s):

Elmira Shoushtari ◽

M. Saiid Saiidi ◽

Ahmad Itani ◽

Mohamed A. Moustafa

Keyword(s):

Accelerated Bridge Construction ◽

Shake Table ◽

Bridge Construction ◽

Steel Girder ◽

Steel Girder Bridge ◽

Girder Bridge

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Dynamic characterization of multiple identical spans of a steel girder bridge

Bridge Maintenance, Safety, Management, Resilience and Sustainability - Bridge Maintenance, Safety and Management ◽

10.1201/b12352-520 ◽

2012 ◽

pp. 3464-3471

Author(s):

R Maestri ◽

E Fernstrom ◽

K Grimmelsman

Keyword(s):

Dynamic Characterization ◽

Steel Girder ◽

Steel Girder Bridge ◽

Girder Bridge

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Life Cycle Cost Management Strategy on Corrosion Deterioration and Fatigue Damage of Steel Girder Bridge

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.385-387.845 ◽

2008 ◽

Vol 385-387 ◽

pp. 845-848

Author(s):

Moe M.S. Cheung ◽

Kevin K.L. So ◽

Xue Qing Zhang

Keyword(s):

Life Cycle ◽

Fatigue Damage ◽

Life Cycle Cost ◽

Management Strategies ◽

Maintenance Cost ◽

Steel Girder ◽

Damage Models ◽

Failure Cost ◽

Steel Girder Bridge ◽

Girder Bridge

This paper proposes a life-cycle cost (LCC) management methodology that integrates corrosion deterioration and fatigue damage mechanisms. This LCC management methodology has four characterized features: (1) corrosion deterioration and fatigue damage models are used to predict the time when the pre-defined limits are reached; (2) the performance of the steel girder is measured by condition state sets in which deflection, moment and shear capacities and fatigue strength limits are considered altogether; (3) the cost-effectiveness of management strategies are measured by the performance improvement per unit of money spent; and (4) the LCC model includes initial design/construction cost, inspection cost, maintenance cost, repair/rehabilitation cost and failure cost. A steel girder bridge is used as an example to demonstrate the application of the proposed LCC management methodology.

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Steel Girder Bridge with RC Deck Retrofit From Non-Composite to Composite Behaviour

IABSE Congress, Stockholm 2016: Challenges in Design and Construction of an Innovative and Sustainable Built Environment ◽

10.2749/stockholm.2016.1964 ◽

2016 ◽

Author(s):

Abheetha Peiris ◽

Issam Elias Harik

Keyword(s):

Field Tests ◽

High Strength ◽

The United States ◽

Field Application ◽

Steel Girder ◽

Shear Connectors ◽

Before And After ◽

Steel Girder Bridge ◽

Girder Bridge ◽

Concrete Deck

In the past, a number of steel girder-reinforced concrete deck bridges on county roads in the United States have been built as non-composite. Most of these bridges currently have load postings limiting the capacity of bus and truck loads on their roadways. Recent research showed that post installed high strength bolts could be used as shear connectors in rehabilitation work to achieve partial composite design by deploying 30% to 50% of the connectors typically required for a full composite design. This paper presents details on the analysis, design, and field application of post-installed shear connectors on a non-composite concrete deck steel girder bridge in Kentucky. In order to minimize traffic disruption and construction costs, the shear connectors were inserted on the bottom side of the deck through the top flange of the steel girder. While the load rating increased by 132%, field tests conducted before and after installation of the shear connectors showed that the bridge's live load deflections were reduced by more than 27%.

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