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 IIS staff with links to the full text when permitted by the publisher.
- Grimmelsman K.A., Prader J.B.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.ASCEThis 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.
Assessment of Long-Span Bridge Performance Issues through an Iterative Approach to Ambient Vibration–Based Structural IdentificationN. C. Dubbs, PE, M.ASCE; and F. L. Moon, M.ASCEThis paper illustrates the importance of explicitly including the approach spans within the St-Id of long-span bridges.
- Imad Al-Qadi, Hao Wang, Yanfeng Ouyang, Kirk Grimmelsman, and Jeffrey PurdyA literature review of the state of the practice for WIM systems installed in pavements and on bridges was perfomed as part of FHWA's LTBP Program.
- Navid Zolghadri; Marvin W. Halling; and Paul J. BarrCollecting vibration and temperature data continuously have enabled researchers to investigate the correlation between environmental effects and identified modal parameters.
An Experimental Study for Quantitative Estimation of Rebar Corrosion in Concrete Using Ground Penetrating RadarIstiaque Hasan and Nur YazdaniThe variation of GPR response over a range of corrosion states of steel rebar embedded in concrete and the effect of concrete dielectric constant on GPR response was investigated.
- N. C. Dubbs, P.E., M.ASCE; and F. L. Moon, M.ASCEThe research reported in this paper aims to implement and compare current MM ST-ID approaches.
- Yarnold M, Dubbs N.Discussion of 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.
Interpretation and Reporting of Load Test Results from a Cantilever-Truss Bridge with Internal Movement MechanismsDubbs, N.Monitoring applications, have become more widespread and accepted, this paper discusses streamline monitoring system designs to focus a fixed quantity of manageable sensors to the areas of greatest uncertainty.
- Navid Zolghadri ; Marvin W. Halling ; and Paul J. BarrShows how smaller segments of data can be used for extracting the modal properties with similar accuracy.
- Fernstrom, E.V., Carreiro, J., and Grimmelsman, K.A.This article reports on an early milestone in the process of developing a novel, low-cost MIMO system intended for testing of short- and medium-span bridges.
- Jeffrey Weidner, Matthew Yarnold and Nathaniel DubbsSHM systems are not an off-the-shelf solution. SHM systems are designed for each bridge, and is supported by engineering heuristics and knowledge about the bridge.
- Istiaque Hasan, Nur YazdaniA full scale non-destructive evaluation of the concrete covers of a newly constructed bridge deck was carried out using ground penetrating radar (GPR) equipment and significant retrofitting of the bridge deck was recommended.
- Two different B-WIM methods were used to calculate the speed of the trucks.
- Hasan, Istiaque and Yazdani, NurDue to possible construction errors, a full scale non-destructive evaluation of the concrete covers in the deck surface was carried out using Ground Penetrating Radar (GPR). Based on the results, significant retrofitting of the bridge deck was required.
- E.V. Fernstrom, J.L. Carreiro, J.D. Rawn and K.A. GrimmelsmanThe objective of the project was to evaluate if the FWD, which can produce a broadband dynamic force, can be effectively used as a tool for quantitatively characterizing the performance and condition of bridges.
- Zhang, J., J. Prader, K.A. Grimmelsman, F.L. Moon and A.E. Aktan; with, Shama, A.The goal of this paper is to leverage a vibration test of a long-span suspension bridge to illustrate a number of possible strategies for coping with the uncertainties confronted when identifying the dynamic characteristics of large-scale constructed systems.
Structural Identification of Constructed Systems: Approaches, Methods, and Technologies for Effective Practice of St-IdPRACTICE OF ST-ID Edited by F. Necati Çatbaş, Tracy Kijewski-Correa, and A. Emin AktanAn overview of nearly 20 years of research directed at bridging the gap in structural engineering between models and real structural systems.
Critical issues, condition assessment and monitoring of heavy movable structures: emphasis on movable bridgesF. Necati Catbasa, Mustafa Gulb, H. Burak Gokcea, Ricardo Zaurina, Dan M. Frangopolc & Kirk A. GrimmelsmanMovable bridges consist of complex structural, mechanical and electrical systems that provide versatility to these bridges, but at the same time, create intermittent operational and maintenance challenges.
- Zhou, Y., J. Prader, J. Weidner, N. Dubbs, F.L. Moon, A.E. AktanExperimental data were collected for structural identification (St-Id) of a deteriorated bridge. The St-Id procedure used during this application was designed to mitigate blatant human error and epistemic uncertainty in the data interpretation process.