Dr. William Davids Archives - Transportation Infrastructure Durability Center

Dr. William Davids

sensor placement under grist mill bridge

Project 3.17: Assessment of CT Girder Load Distribution and Web Buckling Through Field Load Testing and Finite-Element Analysis

Assessment of CT Girder Load Distribution and Web Buckling Through Field Load Testing and Finite-Element Analysis Project 3.17: Field Live Load Testing and Advanced Analysis of Concrete T-Beam Bridges to Extend Service Life Project Summary Recent and ongoing research has highlighted the need to better understand and quantify web shear capacity as well as the […]

Project 3.21: GBeam Bridge Girder Pultrusion: Section Design and Optimization

GBeam Bridge Girder Pultrusion: Section Design and Optimization Project 3.21 Project Summary The GBeam girder system, recently developed by the University of Maine (Dagher et al. 2019; Davids et al. 2022a; Davids et al. 2022b), holds significant promise for widespread application in conventional, slab-on-girder bridges. Its successful initial implementation is driven by enhanced durability, low […]

3.18 cover image of a diagram showing test method of concrete deck

Project 3.18: Steel-Free Concrete Bridge Decks

Steel-Free Concrete Bridge Decks Project 3.18: Project Summary In order to realize a potentially transformational improvement in concrete bridge deck durability, the proposed research program intends to validate a deck design by which little to no conventional reinforcement is required. The design relies on the development of so-called arching action to maintain compressive stresses in […]

Project 3.16: CT bridge girder sections with precast decks and FRP girder-deck shear

CT Bridge Girder Sections with Precast Decks and FRP Girder-Deck ShearConnectors Project 3.16 Project Summary UMaine recently developed and commercialized, in partnership with AIT Bridges, a novel, fiber‐reinforced polymer (FRP) composite bridge girder. This project focuses on the assessment of the fiber‐reinforced polymer tub girder (CT girder) with precast concrete decks and new, FRP girder‐deck […]

Project 3.14: FRP-Concrete Hybrid Composite Girder Systems: Web Shear Strength and Design Guide Development

FRP-Concrete Hybrid Composite Girder Systems: Web Shear Strength and Design Guide Development Project 3.14 Project Summary UMaine recently developed and commercialized, in partnership with AIT Bridges, a novel, fiber-reinforced polymer (FRP) composite bridge girder. This project will assess the shear strength of foam-core webs of the girders using a combined experimental and analytical approach. Data […]

Project 3.10: Assessment and optimization of double CT bridge girder sections with longitudinal precast decks

Assessment and Optimization of Double Ct Bridge Girder Sections With Longitudinal Precast Decks Project 3.10 Project Summary This project focuses on the extension of novel, fiber-reinforced polymer tub girder (CT girder) sections to incorporate precast concrete deck panels. This will extend the application of this new bridge technology by modularizing construction, optimizing the use of […]

Project 3.11: Assessment of Micropile-Supported Integral Abutment Bridges

Assessment of Micropile-Supported Integral Abutment Bridges PHASE 2: Flexural Strength and Durability of Micropile Threaded Connections Project 3.11 Project Summary Integral abutment bridges (IABs) are the preferred method of construction by Maine Department of Transportation (DOT) and other transportation agencies throughout the United States due to their durability and reduced upfront and life-cycle costs. Shallow […]

Two FRP bridge girders being lifted by a crane

Project 3.04: Testing, Monitoring and Analysis of FRP Girder Bridge with Concrete Deck

Testing, Monitoring and Analysis of FRP Girder Bridge with Concrete Deck Project 3.4

Project 1.01: Field Live Load Testing and Advanced Analysis of Concrete T-Beam

Field Live Load Testing and Advanced Analysis of Concrete T-Beam Bridges to Extend Service Life Project 1.1 Project Summary Concrete T-beam bridges are an important class of structures that has seen limited investigation. These structures are often perceived as quite robust and are in good condition, but possess very low rating factors based on conventional […]