Browse by

 

 

This collection contains technical reports and publications of the Infrastructure Research Institute.

Recent Submissions

  • Evaluation of Cracking Performance of Bridge Decks in Minnesota 

    Pendergrass, Benjamin; Shrestha, Pankaj; Riedel, Elizabeth; Polley, Grant; Darwin, David (University of Kansas Center for Research, Inc., 2013-10)
    Six bridge decks in Minnesota supported by steel girders were evaluated based on cracking performance. The decks included two constructed in accordance with Minnesota low-cracking specifications and four constructed in ...
  • Proposed Modifications to ACI 318-95 Tension Development and Lap Splice for High-Strength Concrete 

    Azizinamini, Atorod; Darwin, David; Eligehausen, Rolf; Pavel, Rob; Ghosh, S. K. (American Concrete Institute, 1999-11-01)
    Safety concerns and a lack of test data are responsible for the current upper limit of 100 psi on the square root of the concrete compressive strength for use in calculating tension development and lap splice lengths. Based ...
  • Anchorage Strength of Standard Hooked Bars in Simulated Exterior Beam-Column Joints 

    Yasso, Samir; Darwin, David; O'Reilly, Matthew (University of Kansas Center for Research, Inc., 2017-04)
    The current ACI hooked bar design provisions are based on test results of 38 simulated beam-column joints containing two hooked bars. The provisions address the effects of hooked bar surface condition, concrete cover, ...
  • Anchorage Strength of Reinforcing Bars With Standard Hooks 

    Ajaam, Ali; Darwin, David; O'Reilly, Matthew (University of Kansas Center for Research, Inc., 2017-04)
    Hooked bars are often used to anchor reinforcing steel where concrete dimensions are not sufficient to provide the required development length for straight reinforcement, such as in external beam-column joints. The purpose ...
  • Torsional Analysis for Exterior Girders 

    Roddis, W. M. Kim; Kriesten, Mark; Liu, Zhong (University of Kansas Center for Research, Inc., 1999-04)
    Concrete deck placement imposes eccentric loading on exterior steel bridge girders. This report describes a design tool that aids bridge engineers in evaluating the response of the exterior girder due to this eccentric ...
  • Seismic Behavior and Detailing of High-Performance Fiber-Reinforced Concrete Coupling Beams and Coupled Wall Systems 

    Lequesne, Rémy D.; Parra-Montesinos, Gustavo; Wight, James K. (University of Kansas Center for Research, Inc., 2013)
    The seismic behavior of coupling beams and walls constructed with tensile strain-hardening, high-performance fiber-reinforced concrete (HPFRC) was studied through tests of large-scale precast coupling beams and coupled ...
  • Proposed Revisions to the Strength-Reduction Factor for Axially Loaded Members 

    Lequesne, Rémy D.; Pincheira, José A. (University of Kansas Center for Research, Inc., 2014)
    Modifications correct anomalies for nonprestressed reinforced concrete members subjected to flexure and axial loads
  • Seismic Response of Fiber-Reinforced Concrete Coupled Walls 

    Lequesne, Rémy D.; Parra-Montesinos, Gustavo; Wight, James K. (University of Kansas Center for Research, Inc., 2016)
    The behavior of coupled T-shaped structural walls was studied through tests of two large-scale four-story specimens under reversed cyclic lateral displacements. The use of tensile strainhardening, high-performance ...
  • A Review of Research on Shear Strength Decay in Members under Load Reversals 

    Lequesne, Rémy D.; Parra-Montesinos, Gustavo (University of Kansas Center for Research, Inc., 2016)
    In the design of reinforced concrete earthquake-resisting frame members, it is critical that shear distress be limited in order to ensure acceptable deformation capacity and reduce damage. Accordingly, several ACI Building ...
  • Deformation Capacity and Strength of RC Frame Members with High-Strength Materials 

    Cheng, Min-Yuan; Wibowo, Leonardus S. B.; Lequesne, Rémy D.; Lepage, Andrés (University of Kansas Center for Research, Inc., 2016)
    Some implications of using high-strength concrete and steel materials in reinforced concrete frame members are discussed in terms of both flexural design and behavior. Through an example, it is demonstrated that the computed ...
  • Earthquake-Resistant Squat Walls Reinforced with High- Strength Steel 

    Cheng, Min-Yuan; Hung, Shih-Ching; Lequesne, Rémy D.; Lepage, Andrés (University of Kansas Center for Research, Inc., 2016)
    Results are reported from reversed cyclic tests of five large-scale squat wall specimens reinforced with steel bars having a specified yield strength of either 60 or 115 ksi (413 or 792 MPa). Two specimens were designed ...
  • Bond of Top-Cast Bars in Bridge Decks 

    Donahey, Rex C.; Darwin, David (University of Kansas Center for Research, Inc., 1985)
    The effects of consolidation method and two-course construction on the bond strength of top-cast reinforcement in concrete bridge decks were studied as functions of slump, bleed. and slab depth. Consolidation was varied ...
  • Bond of Reinforcement to Superplasticized Concrete 

    Brettmann, Barie B.; Darwin, David; Donahey, Rex C. (University of Kansas Center for Research, Inc., 1986)
    The effects of superplasticizers on concrete-steel bond strength were studied. Key variables were degree of consolidation; concrete slump, both with and without a superplasticizer; concrete temperature; and bar position. ...
  • Bond of Reinforcement to Revibrated Concrete 

    Altowaiji, Wisam A. K.; Darwin, David; Donahey, Rex C. (University of Kansas Center for Research, Inc., 1986)
    The effects of revibration on concrete-steel bond strength are studied. Key variables are concrete slump, bar position, and the time interval between initial vibration and revibration. No 8 (25 mm) deformed reinforcing ...
  • Strain-Rate Sensitive Behavior of Cemet Paste and Mortar in Compression 

    Harsh, Shraddhakar; Shen, Zhenjia; Darwin, David (University of Kansas Center for Research, Inc., 1990)
    The strain-rate sensitivity of the cement paste and mortar constituents of concrete is studied experimentally. Saturated cement paste and mortar specimens are loaded in compression to 15,000 microstrains, 27 to 29 days ...
  • Bond of Epoxy-Coated Reinforcement: Bar Parameters 

    Choi, Oan Chul; Hadje-Ghaffari, Hossain; Darwin, David; McCabe, Steven L. (University of Kansas Center for Research, Inc., 1991)
    The effects of coating thickness, deformation pattern, and bar size on the reduction in bond strength between reinforcing bars and concrete caused by epoxy coating are described. Tests include beam-end and splice specimens ...
  • Development Length Criteria: Bars Not Confined by Transverse Reinforcement 

    Darwin, David; McCane, Steven L.; Idun, Emmanuel K.; Schoenekase, Steven P. (University of Kansas Center for Research, Inc., 1992)
    An expression that accurately represents development and splice strength as a function of concrete cover and bar spacing is developed. The expression is then used to establish and evaluate modifications to the bond and ...
  • Bond of Epoxy-Coated Reinforcement: Splices 

    Hester, Cynthia J.; Salamizavaregh, Shahin; Darwin, David; McCabe, Steven L. (University of Kansas Center for Research, Inc., 1993)
    The effects of epoxy coating and transverse reinforcement on the splice strength of reinforcing bars in concrete are described. A total of 65 beam and slab splice specimens containing No. 6 and No. 8 bars were tested. The ...
  • Bond of Epoxy-Coated Reinforcement: Cover, Casting Position, Slump, and Consolidation 

    Hadje-Ghaffari, Hossain; Choi, Oan Chul; Darwin, David; McCabe, Steven L. (University of Kansas Center for Research, Inc., 1994)
    The effects of concrete cover, casting position, concrete slump, and degree of consolidation on the reduction in bond strength between reinforcing bars and concrete caused by epoxy coating are described. Tests include ...
  • Splice Strength of High Relative Rib Area Reinforcing Bars 

    Darwin, David; Tholen, Michael L.; Idun, Emmanuel K.; Zuo, Jun (University of Kansas Center for Research, Inc., 1996)
    This paper described the testing and analysis of 93 beam-splice specimens containing No. 5, No. 8, and No. 11 (16, 25 and 36mm) bars with relative rib areas (ratio of projected rib area normal to bar axis to the product ...

View more