Thomas Golecki, SE, PE
Bridgemiser™ is a flexible refined analysis tool that has been used on a variety of structure types for both design iterations and load ratings for legal and special permit vehicles. It has a built-in functionality to handle the many unique configurations of bridges such as curvature, skew, cross frame geometry, support conditions, vehicle configurations etc. Since this system was developed in-house, additional functionality is continually being added.
Nathaniel Dubbs, PhD, PE
Intelligent Infrastructure Systems deploys web-based Structural Health Monitoring technologies on major bridges to track performance metrics and mitigate risks to provide bridge owners with better situational awareness and a higher level of comfort.
Kirk A. Grimmelsman, John B. Prader
This paper presents the results of an experimental study on the characteristics of the vibrations induced by trucks crossing a multi-beam highway bridge.
Navid Zolghadri, S.M.ASCE; Marvin W. Halling, F.ASCE; Nephi Johnson, S.M.ASCE; and Paul J. Barr, A.M.ASCE
This study addresses the feasibility of using a single-span bridge as a weigh-in-motion (WIM) tool to quantify the gross vehicle weights (GVWs) of trucks inexpensively with a small number of sensors and without using axle detectors.
N. C. Dubbs, PE, M.ASCE; and F. L. Moon, M.ASCE
In this case study, two iterations of the structural identification (St-Id) process were applied to (1) develop a comprehensive finite-element (FE) model (inclusive of approach spans) representative of the general dynamic properties (frequencies and mode shapes), and (2) check that the response magnitudes were consistent with those expected from vehicular traffic.
Imad Al-Qadi, Hao Wang, Yanfeng Ouyang, Kirk Grimmelsman, and Jeffrey Purdy
As part of the Federal Highway Administration’s (FHWA) Long-Term Bridge Performance (LTBP) Program, a literature review of the state of the practice was performed for WIM systems installed in pavements and on bridges.
Navid Zolghadri; Marvin W. Halling; and Paul J. Barr
Collecting vibration and temperature data continuously have enabled researchers to investigate the correlation between environmental effects and identified modal parameters
Istiaque Hasan and Nur Yazdani
An investigation was conducted to find out the relationship between the amount of reinforced concrete corrosion and GPR maximum positive amplitude.
N. C. Dubbs, P.E., M.ASCE; and F. L. Moon, M.ASCE
The research reported in this paper aimed to (1) implement and compare current MM ST-ID approaches on a physical laboratory model to establish their accuracy and identify their merits and shortcomings, and (2) identify the ability to refine MM ST-ID methods by weighing observations based on their correlation with the desired predictions.
Yarnold M, Dubbs N.
This paper discusses a method, termed periodic temperature-based assessment (PTBA), which aimed to supplement visual inspection through measured input–output temperature responses without the use of a finite element model.
This paper introduces a long span bridge in the United States which was found to have unsatisfactory ratings for structural elements at different locations along the main load carrying path.
Navid Zolghadri ; Marvin W. Halling ; and Paul J. Barr
In this study, the random decrement (RD) technique along with the Ibrahim Time Domain (ITD) method were evaluated for modal identification of structures through both wired and wireless sensors. This paper shows how smaller segments of data can be used for extracting the modal properties with similar accuracy.