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Infrastructure Research Institute Scholarly Works: Recent submissions

Now showing items 261-280 of 339

    • Effects of Construction Procedures on Bond in Bridge Decks 

      Donahey, Rex C.; Darwin, David (University of Kansas Center for Research, Inc., 1983-01)
      The effects of con so I i dati on method and two-course construction on concrete-steel bond in concrete bridge decks are studied as functions of slump, b I eed, and depth of slab. Consolidation was varied by vi bra tor ...

    • Grid Size Effects With Smeared Cracking in Finite Element Analysis of Reinforced Concrete 

      Dodds, Robert H., Jr; Darwin, David; Smith, Jerry L.; Leibengood, Linda D. (University of Kansas Center for Research, Inc., 1982-08)
      The effects of modeling parameters on the response of finite element representations of reinforced concrete members are examined. Convergence of load-deflection curves and cracking patterns is studied. Nonlinear behavior ...

    • Mortar Constituent of Concrete Under Cyclic Compression 

      Maher, Ataullah; Darwin, David (University of Kansas Center for Research, Inc., 1980-10)
      The behavior of the mortar constituent of concrete under cyclic compression was studied and a simple analytical model was developed to represent its cyclic behavior. The experimenta 1 work consisted of monotonic and cyclic ...

    • Composite Beams With Web Openings 

      Clawson, William C.; Darwin, David (University of Kansas Center for Research, Inc., 1980-10)
      The purpose of this investigation was to study the behavior and develop an ultimate strength model for composite beams with rectangular web openings. Six composite beams with concentric rectangular web openings were tested ...

    • Shear Strength of Lightly Reinforced Concrete Beams 

      Palaskas, Michael N.; Darwin, David (University of Kansas Center for Research, Inc., 1980)

    • 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., 1995)
      This paper describes the testing and analysis of83 beam-splice specimens containing No. 5, No. 8, and No. 11 ( 16, 25, and 36 mm) bars with relative rib areas (ratio ofprojected rib area nonnal to bar axis to the product ...

    • Development Length Criteria for Conventional and High Relative Rib Area Reinforcing Bars 

      Darwin, David; Zuo, Jun; Tholen, Michael L.; Idun, Emmanuel K. (University of Kansas Center for Research, Inc., 1995)
      Statistical analyses of 133 splice and development specimens in which the bars are not confined by transverse reinforcement and 166 specimens in which the bars are confined by transverse reinforcement are used to develop ...

    • Reliability-Based Strength Reduction Factor For Bond 

      Darwin, David; Idun, Emmanuel K.; Zuo, Jun; Tholen, Michael L. (University of Kansas Center for Research, Inc., 1995)
      The formulation and calculation of a reliability-based strength-reduction ( <P) factor for developed and spliced bars is described. Conventional and high relative rib area bars, both with and without confining reinforcement, ...

    • Bond of Epoxy-Coated Reinforcement Concrete: Cover, Casting Position, Slump, and Consolidation 

      Hadje-Ghaffari, Hossain; Choi, Oan Chul; Darwin, David; McCabe, Steven L. (University of Kansas Center for Research, Inc., 1992)
      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 ...

    • Deflections of Composite Beams with Web Openings 

      Benitez, Manuel A.; Darwin, David; Donahey, Rex C. (University of Kansas Center for Research, Inc., 1990)
      Procedures for calculating the deflections of composite beams with web openings are described. Initially, a matrix formulation is used. Modeling assumptions are verified by comparison with experimental data, and recommendations ...

    • Rate Sensitive Behavior of Cement Paste and Mortar in Compression 

      Harsh, Shraddhakar; Shen, Zhenjia; Darwin, David (University of Kansas Center for Research, Inc., 1989-03-01)

    • Simplified Design of Slender Reinforced Concrete 

      Mockry, Eldon F.; Darwin, David (University of Kansas Center for Research, Inc., 1980)

    • Shear Cracking and Stirrup Effectiveness of Lightly Reinforced Concrete Beams 

      Attiogbe, Emmanuel K.; Palaskas, Michael N.; Darwin, David (University of Kansas Center for Research, Inc., 1980-07)

    • Nonlinear Model for Reinforced Concrete Slabs 

      Bashur, Fuad K.; Darwin, David (University of Kansas Center for Research, Inc., 1976-12)

    • Inelastic Model for Cyclic Biaxial Loading of Reinforced Concrete 

      Darwin, David; Pecknold, D. A. W. (University of Kansas Center for Research, Inc., 1974-07)
      Reinforced concrete is a major medium of construction throughout the world. While in service, reinforced concrete structures are subjected to many cycles of load. In the case of structures subjected to seismic loading, the ...

    • A Simplified Method to Estimate Nonlinear Response with an Approximate Linear Analysis for Reinforced Concrete Structures 

      Warden, Brandon; Browning, JoAnn; Matamoros, Adolfo B. (University of Kansas Center for Research, Inc., 2006-04)
      A background on simple methods to estimate nonlinear response of multidegree- of-freedom (MDOF) systems currently in use is presented as an introduction to development of a new method. A series of nonlinear analyses of 105 ...

    • Laboratory and Field Tests of Multiple Corrosion Protection Systems for Reinforced Concrete Bridge Components and 2205 Pickled Stainless Steel 

      Guo, Guohui; Darwin, David; Browning, JoAnn; Locke, Carl E., Jr. (University of Kansas Center for Research, Inc., 2006-06)
      Multiple corrosion protection systems for reinforcing steel in concrete and the laboratory and field test methods used to compare these systems are evaluated. The systems include conventional steel, epoxy-coated reinforcement ...

    • Determining Major Causes of Highway Work Zone Accidents in Kansas 

      Bai, Yong (University of Kansas Center for Research, Inc., 2006-06)
      Highway work zones constitute a major safety concern for government agencies, the legislature, the highway industry, and the traveling public. Despite the efforts made by government agencies and the highway industry, there ...

    • Post Retrofit Analysis of the Tuttle Creek Bridge Br. No. 16-81-2.24 

      Anderson, Benjamin; Rolfe, Stanley T.; Matamoros, Adolfo B.; Bennett, Caroline; Bonetti, Santiago Antonio (University of Kansas Center for Research, Inc., 2007-01)
      The Tuttle Creek Bridge was built in 1962. Like many older welded steel bridges, it has developed fatigue cracks. The majority of cracks were forming in the upper web-gap region. In addition, fatigue cracking was occurring ...

    • Evaluating Free Shrinkage of Concrete for Control of Cracking in Bridge Decks 

      Deshpande, Swapnil; Darwin, David; Browning, JoAnn (University of Kansas Center for Research, Inc., 2007-01)
      The effects of paste volume, water-cement ratio, aggregate type, cement type, curing period, and the use of mineral admixtures and superplasticizers on the free shrinkage of concrete are evaluated with the goal of establishing ...