Scott Walbridge
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View article: Fatigue life prediction of friction-stir-welded aluminum bridge decks – Experimental tests and numerical framework
Fatigue life prediction of friction-stir-welded aluminum bridge decks – Experimental tests and numerical framework Open
This paper presents the results of experimental tests and proposes a numerical framework for the prediction of the fatigue behaviour of friction stir welded (FSW) butt-lap joints of aluminium bridge deck extrusions. Fatigue test specimens …
View article: A WIM-Based Assessment of Multiple Vehicle Presence Effects on Fatigue Damage of Highway Bridges
A WIM-Based Assessment of Multiple Vehicle Presence Effects on Fatigue Damage of Highway Bridges Open
The fatigue provisions for bridge design in North America and Europe are highly simplified for the sake of practical implementation, in comparison with the state of the art in understanding of the true fatigue behavior. Historically, one s…
View article: Assessment of critical parameters affecting fretting fatigue life of bridge stay cables at saddle supports
Assessment of critical parameters affecting fretting fatigue life of bridge stay cables at saddle supports Open
Saddle systems are a popular solution for supporting cables in cable-stayed bridges. Fretting fatigue failure of cables at saddle supports is a primary design consideration for these systems. Critical parameters that affect the fretting fa…
View article: Fatigue Testing and Analysis of Flare Bevel Groove-Welded Aluminum Joints for Pedestrian Bridge Applications
Fatigue Testing and Analysis of Flare Bevel Groove-Welded Aluminum Joints for Pedestrian Bridge Applications Open
Flare bevel groove (FBG) welds are used in truss bridges with square hollow structural section (HSS) members. To reduce costs, joints can be welded without bevelling, but this negatively impacts the fatigue performance of the connection. T…
View article: Fretting fatigue tests and microstructure analysis of bridge stay cable wires
Fretting fatigue tests and microstructure analysis of bridge stay cable wires Open
Saddle systems are a popular method for supporting the cables at the pylons of cable‐stayed bridges. Fretting fatigue failure of bridge stay cables is a major design consideration for saddle systems. Current design provisions require large…
View article: Fatigue behaviour of butt-lap friction stir welded joints used with aluminum bridge decks
Fatigue behaviour of butt-lap friction stir welded joints used with aluminum bridge decks Open
This paper presents the results of experimental tests and a numerical investigation of the fatigue behavior of buttlap friction stir welded (FSW) joints used in highway bridge decks made from aluminum extrusions. A large-scale fatigue expe…
View article: Using 3D Scanning for Accurate Estimation of Termination Points for Dimensional Quality Assurance in Pipe Spool Fabrication
Using 3D Scanning for Accurate Estimation of Termination Points for Dimensional Quality Assurance in Pipe Spool Fabrication Open
Increased prefabrication and modularization have resulted in fabrication shops producing more complex assemblies with tighter tolerances. Most measurements in fabrication shops are still done using manual tools that are not accurate enough…
View article: Comparison of International Brittle Fracture Design Code Provisions for Steel Bridges
Comparison of International Brittle Fracture Design Code Provisions for Steel Bridges Open
Brittle fracture is a major concern to structural engineers as it has significant consequences for safety and cost. Although modern day occurrences of brittle fracture are rare, it is well known that they can occur without warning and may …
View article: Reliability analysis of welded stud shear connectors on simply-supported bridge girders
Reliability analysis of welded stud shear connectors on simply-supported bridge girders Open
This paper examines the reliability of welded stud shear connectors for steel-concrete composite bridge girders. A finite element model of a simply-supported bridge was created featuring link connector elements representing the shear studs…
View article: Influence of tool offsetting and base metal positioning on the material flow of AA5052-AA6061 dissimilar friction stir welding
Influence of tool offsetting and base metal positioning on the material flow of AA5052-AA6061 dissimilar friction stir welding Open
This study examines dissimilar friction stir welding of AA5052-AA6061 aluminum alloys with varying tool offsets. The base metals were positioned and fixed at a slight diagonal positioning such that varying tool offset position from the cen…
View article: Performance of Embedded Bolt Shear Connectors
Performance of Embedded Bolt Shear Connectors Open
A laboratory research program carried out at the University of Waterloo featured the testing of three large-scale steel-concrete composite beam specimens with embedded bolt shear connectors. A detailed assessment of the connector performan…
View article: Probabilistic fatigue analysis of a post-weld treated tubular bridge
Probabilistic fatigue analysis of a post-weld treated tubular bridge Open
In this paper, several probabilistic models for evaluating the fatigue performance of post-weld treated tubular bridge structures are briefly described. The application of the models is then demonstrated on a full-scale example bridge. Und…
View article: Fatigue behaviour of improved tubular bridge joints
Fatigue behaviour of improved tubular bridge joints Open
This paper presents the results of several probabilistic linear elastic fracture mechanics (LEFM) calculations conducted to study the fatigue behaviour of tubular bridge joints with and without post weld treatment. The effect of post weld …
View article: Performance of Pedestrian-Load Models through Experimental Studies on Lightweight Aluminum Bridges
Performance of Pedestrian-Load Models through Experimental Studies on Lightweight Aluminum Bridges Open
Aluminum structures provide a high strength-to-weight ratio, are corrosion resistant, and are esthetically pleasing. Hence, their use in bridge construction has recently begun to increase, especially for pedestrian bridges. Because of thei…
View article: STR-964: STUDIES ON VIBRATION SERVICEABILITY ASSESSMENT OF ALUMINUM PEDESTRIAN BRIDGES
STR-964: STUDIES ON VIBRATION SERVICEABILITY ASSESSMENT OF ALUMINUM PEDESTRIAN BRIDGES Open
Vibration serviceability is often the governing design factor for slender, lightweight footbridges. However, there is currently a large gap that exists between our understanding from a modeling perspective and their actual vibration behavi…
View article: STR-934: FATIGUE RESPONSE OF UHPC AS A CLOSURE STRIP MATERIAL IN PREFABRICATED BRIDGE APPLICATIONS
STR-934: FATIGUE RESPONSE OF UHPC AS A CLOSURE STRIP MATERIAL IN PREFABRICATED BRIDGE APPLICATIONS Open
Replacement of concrete bridge decks can be an expensive process. In order to decrease costs and time of construction, precast deck panels can be used with closure strips cast in place between the panels. In order to ensure that these conn…
View article: STR-923: FATIGUE OF STUD SHEAR CONNECTORS IN STEEL-PRECAST COMPOSITE BRIDGES
STR-923: FATIGUE OF STUD SHEAR CONNECTORS IN STEEL-PRECAST COMPOSITE BRIDGES Open
Modular bridge systems consisting of precast concrete deck panels connected to steel girders are becoming increasingly popular due to their rapid construction and optimal material utilization. The shear connection is a critical element of …