The development of low-cost wireless sensor networks has resulted in resurgence in the development of ambient vibration monitoring methods to assess the in-service condition of highway bridges. However, a reliable approach towards assessing the health of an in-service bridge and identifying and localizing damage without a priori knowledge of the vibration response history has yet to be formulat...

Development and implementation of RABIT (Robotics Assisted Bridge Inspection Tool) in condition assessment concrete bridge decks is described. The system uses multiple nondestructive evaluation (NDE) technologies in characterization of three most common deterioration types: rebar corrosion, delamination, and concrete degradation. The system implements four NDE technologies: electrical resistivi...

Seismic evaluations of many existing deck-truss bridges have revealed the vulnerability of their substructure and members of their superstructure. An innovative retrofit strategy developed by the authors includes replacement of the existing non-ductile end and lower-end bracing with ductile panels by incorporating energy dissipating devices to act as fuses, which can yield and dissipate energy ...

INTRODUCTION The lower ratio of dead load to live load than existing multi-girder bridges, wide girder spacing and simplified structural system of the twin-girder bridges can give rise to change of dynamic characteristics of the bridges. Wider girder spacing and changing of dynamic features will also effect on a vibration serviceability of the bridges. What is worse, according to running vehicl...

Deck inclination and vertical displacements are among the most important technical parameters to evaluate the health status of a bridge and to verify its bearing capacity. Several methods, both conventional and innovative, are used for structural rotations and displacement monitoring; however, none of these allow, at the same time, precision, automation, static and dynamic monitoring without us...

With the increase in traffic volume and overweight vehicles, fatigue problems are highlighted. Especially for orthotropic steel deck, premature cracks seriously affect service performance, operation, quality of bridge. In this paper, box-girder segment model deck substructure considering several typical were established to reveal variation law on vibration frequency deflection under vehicle tra...

The weak connection performances between the waterproof adhesive layer, bridge deck, and asphalt pavement are important factors that cause deck slippage upheaval affect safety durability of bridge. In this paper, styrene-butadiene-styrene- (SBS-) modified asphalt, SBS-emulsified rubber-modified AMP-100 materials selected to study performance layer in seasonal frozen region. shear strength bond ...