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  • Instrumentation and Monitoring of Precast Bridge Approach Tied to an Integral Abutment in Bremer County
    center administered by the Institute for Transportation Address 2711 S Loop Drive Suite 4700 Ames IA 50010 8664 Phone 515 294 8103 FAX 515 294 0467 Website www ctre iastate edu Copyright 1996 2009 Iowa State University All rights reserved Instrumentation and Monitoring of Precast Bridge Approach Tied to an Integral Abutment in Bremer County Researcher s Principal investigators Brent Phares 515 294 5879 bphares iastate edu Iowa State University Project status Completed Start date 07 18 08 End date 04 30 10 Publications Report Instrumentation and Monitoring of Precast Bridge Approach Tied to an Integral Abutment in Bremer County 2 61 mb pdf April 2010 Sponsor s partner s Sponsor s Federal Highway Administration State Planning and Research Funding Iowa Department of Transportation About the research Abstract The Iowa DOT has long recognized that the approach slab pavement at integral abutment bridges is prone to exhibiting both settlement and cracking which manifest itself as the bump at the end of the bridge This settlement requires considerable ongoing maintenance expenditures creates a negative public perception of the highway system and shortens the useful life of the bridge in question It is also recognized that effectively addressing the settlement and cracking

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=2137257112 (2015-11-09)
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  • Testing and Long-Term Monitoring of 9th Street Bridge Over I-235 in Des Moines: Integral Abutments Supported on Steel Pile/Concrete Drilled Shaft in Glacial Clay
    by PI Search research CTRE is an Iowa State University center administered by the Institute for Transportation Address 2711 S Loop Drive Suite 4700 Ames IA 50010 8664 Phone 515 294 8103 FAX 515 294 0467 Website www ctre iastate edu Copyright 1996 2009 Iowa State University All rights reserved Testing and Long Term Monitoring of 9th Street Bridge Over I 235 in Des Moines Integral Abutments Supported on Steel Pile Concrete Drilled Shaft in Glacial Clay Similar related projects Health Monitoring of Bridge Structures and Components Using Smart Structure Technology Researcher s Principal investigators Brent Phares 515 294 5879 bphares iastate edu Iowa State University Co principal investigators Terry Wipf 515 294 6979 tjwipf iastate edu Project status Completed Start date 04 15 06 End date 04 30 10 Sponsor s partner s Sponsor s Iowa Department of Transportation About the research Abstract The 9th Street Bridge in Des Moines is the first bridge in Iowa that uses a unique integral abutment design The integral abutments are supported on steel H piles that are embedded into concrete drilled shafts which are seated in glacial clay This unique design was developed in an effort to address environemental concerns namely vibrations

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=333475307 (2015-11-09)
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  • Alternative Calibration Method for AASHTO T153
    keyword Project pages maintained by PI Search research CTRE is an Iowa State University center administered by the Institute for Transportation Address 2711 S Loop Drive Suite 4700 Ames IA 50010 8664 Phone 515 294 8103 FAX 515 294 0467 Website www ctre iastate edu Copyright 1996 2009 Iowa State University All rights reserved Alternative Calibration Method for AASHTO T153 Researcher s Principal investigators Peter Taylor 515 294 9333 ptaylor iastate edu Co principal investigators Shashi Nambisan Project status Completed Start date 04 13 09 End date 03 31 10 Sponsor s partner s Sponsor s National Academy of Sciences About the research Abstract Increased concern for environment and worker safety requires that alternatives be found to avoid working with hazardous materials An alternative for the calibration method using mercury in Section 4 of AASHTO T 153 ASTM C 204 is needed The objective of this project was to add an alternative method to AASHTO T 153 The new method must not use hazardous materials and be safer to use than the current method while maintaining the accuracy and precision of the current method The researchers concluded that mechanical devices can be use to measure and calibrate Blaine cells with

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-781502762 (2015-11-09)
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  • Establishing a Dynamic Formula for Pile Design and Construction Control of Pile Driving
    by keyword Project pages maintained by PI Search research CTRE is an Iowa State University center administered by the Institute for Transportation Address 2711 S Loop Drive Suite 4700 Ames IA 50010 8664 Phone 515 294 8103 FAX 515 294 0467 Website www ctre iastate edu Copyright 1996 2009 Iowa State University All rights reserved Establishing a Dynamic Formula for Pile Design and Construction Control of Pile Driving Researcher s Principal investigators Sri Sritharan 515 294 5238 sri iastate edu Iowa State University Co principal investigators Terry Wipf 515 294 6979 tjwipf iastate edu Muhannad Suleiman 515 294 6076 suleiman iastate edu Project status Completed Start date 01 01 08 End date 03 31 10 Publications Reports Development of LRFD Procedures for Bridge Pile Foundations in Iowa Volume III Recommended Resistance Factors with Consideration of Construction Control and Setup 12 40 mb pdf January 2011 Development of LRFD Procedures for Bridge Piles in Iowa Volume IV Design Guide and Track Examples 3 83 mb pdf May 2012 Related publications Volume IV Design Guide and Track Examples 509 19 kb pdf Tech transfer summary May 2012 Volume III Recommended Resistance Factors with Consideration of Construction Control and Setup 803 32 kb

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=423973024 (2015-11-09)
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  • Road Safety Audit for Marion County Road T15
    Search research CTRE is an Iowa State University center administered by the Institute for Transportation Address 2711 S Loop Drive Suite 4700 Ames IA 50010 8664 Phone 515 294 8103 FAX 515 294 0467 Website www ctre iastate edu Copyright 1996 2009 Iowa State University All rights reserved Road Safety Audit for Marion County Road T15 Approaching County Road G46 intersection on County Road T15 eastbound Researcher s Principal investigator Tom McDonald Project status Completed Start date 12 16 10 End date 03 31 10 Publications Report Road Safety Audit for Marion County Road T15 11 82 mb pdf May 2011 Sponsor s partner s Sponsor s Iowa Department of Transportation About the research Abstract To address safety concerns on Marion County Road T15 from Old Highway 5 Attica Road in Knoxville to County Road G28 west of Pella Iowa the county engineer requested a road safety audit RSA An audit team conducted the review on December 16 2010 through a program supported by the Office of Traffic and Safety at the Iowa Department of Transportation DOT The audit team examined 2001 2009 crash data for the entire length of roadway and divided the examined section into five segments for

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1420796676 (2015-11-09)
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  • An Experimental Validation of a Statistical-Based Damage Detection Approach
    s Principal investigators Brent Phares 515 294 5879 bphares iastate edu Iowa State University Co principal investigators Terry Wipf 515 294 6979 tjwipf iastate edu Project status Completed Start date 08 15 08 End date 02 28 10 Publications Report An Experimental Validation of a Statistical Based Damage Detection Approach 6 53 mb pdf December 2010 Tech transfer summary An Experimental Validation of a Statistical Based Damage Detection Approach 828 53 kb pdf Dec 2010 Sponsor s partner s Sponsor s Iowa Department of Transportation About the research Abstract In this work a previously developed statistical based damage detection approach was validated for its ability to autonomously detect damage in bridges The damage detection approach uses statistical differences in the actual and predicted behavior of the bridge caused under a subset of ambient trucks The predicted behavior is derived from a statistics based model trained with field data from the undamaged bridge not a finite element model The differences between actual and predicted responses called residuals are then used to construct control charts which compare undamaged and damaged structure data Validation of the damage detection approach was achieved by using sacrificial specimens that were mounted to the bridge and exposed

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-1807346037 (2015-11-09)
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  • Application of Visualization and Simulation Program to Improve Work Zone Safety and Mobility
    S Loop Drive Suite 4700 Ames IA 50010 8664 Phone 515 294 8103 FAX 515 294 0467 Website www ctre iastate edu Copyright 1996 2009 Iowa State University All rights reserved Application of Visualization and Simulation Program to Improve Work Zone Safety and Mobility Screenshot of a traffic simulation program Researcher s Principal investigators Kelly Strong 515 294 1460 kstrong iastate edu Co principal investigators Charles Jahren 515 294 3829 cjahren iastate edu Ed Jaselskis 515 294 0250 ejaselsk iastate edu Project status Completed Start date 03 15 09 End date 02 28 10 Publications Report Application of Visualization and Simulation Program to Improve Work Zone Safety and Mobility 407 kb pdf January 2010 Sponsor s partner s Sponsor s Iowa Department of Transportation Smart Work Zone Deployment Initiative About the research Abstract A previous study sponsored by the Smart Work Zone Deployment Initiative Feasibility of Visualization and Simulation Applications to Improve Work Zone Safety and Mobility demonstrated the feasibility of combining readily available inexpensive software programs such as SketchUp and Google Earth with standard two dimensional civil engineering design programs such as MicroStation to create animations of construction work zones The animations reflect changes in work zone configurations as

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1264616969 (2015-11-09)
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  • Ethanol Plant By-Product Uses for Pavement GEO-Materials Stabilization, TR-582
    for Pavement GEO Materials Stabilization TR 582 Researcher s Principal investigators Halil Ceylan 515 294 8051 hceylan iastate edu Iowa State University Co principal investigators Kasthurira Gopalakrishnan 515 294 3044 rangan iastate edu Iowa State University Student researcher Sung Hwan Kim Project status Completed Start date 03 01 08 End date 02 28 10 Publications Report Ethanol Plant By Product Uses for Pavement GEO Materials Stabilization TR 582 2 4 mb pdf April 2010 Tech transfer summary Bioful Co Product Uses for Pavement Geomaterials Stabilization 2 9 mb pdf Apr 2010 Sponsor s partner s Sponsor s Iowa Department of Transportation Iowa Highway Research Board About the research Abstract The production and use of biofuels has increased in the present context of sustainable development Biofuel production from plant biomass produces not only biofuel or ethanol but also co products containing lignin modified lignin and lignin derivatives This research investigated the utilization of lignin containing biofuel co products BCPs in pavement soil stabilization as a new application area Laboratory tests were conducted to evaluate the performance and the moisture susceptibility of two types of BCP treated soil samples compared to the performance of untreated and traditional stabilizer treated fly ash soil samples The two types of BCPs investigated were 1 a liquid type with higher lignin content co product A and b a powder type with lower lignin content co product B Various additive combinations co product A and fly ash co products A and B etc were also evaluated as alternatives to stand alone co products Test results indicate that BCPs are effective in stabilizing the Iowa Class 10 soil classified as CL or A 6 8 and have excellent resistance to moisture degradation Strengths and moisture resistance in comparison to traditional additives fly ash could be obtained through the

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1888216102 (2015-11-09)
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