Our staff publishes regularly in both peer-reviewed journals and national/international technical conferences. This tradition is derived from our focus on innovation, and is aimed at ensuring our personnel remain nationally and internationally recognized technical experts. Although we engage in other forms of dissemination (magazines, media) to reach the broader profession and the public, these venues do not demand the same rigor as the peer-review process or permit the technical depth required to convey our innovations. Below is a sample of technical articles by Intelligent Infrastructure Systems staff with links to the full text when permitted by the publisher.

Automating Refined Load Ratings for Girder Bridges

Thomas F. Golecki, PE, SE, M ASCE; and Jeffrey S. Weidner, PhD, M ASCE

This paper discusses the refined rating process, as well as the challenges and benefits of automating this process for multi-girder bridges.

Improving Bridge Analysis with Bridgemiser™

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.

Field Verification of Simplified Bridge Weigh-in-Motion Techniques

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.

LTBP Program’s Literature Review on Weigh-in-Motion Systems

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.

Comparison of Wireless and Wired Structural System Identification

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.

Evaluating Economical Dynamic Exciters for Bridge Vibration Testing

Fernstrom, E.V., Carreiro, J., and Grimmelsman, K.A.

This article presents and describes the results of a laboratory evaluation program conducted for these devices. Their capabilities and operating characteristics are compared with a laboratory-quality linear mass shaker. The preliminary results of a vibration test using these devices on an in-service highway bridge are also discussed.

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