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Infrastructure Research Institute Scholarly Works: Recent submissions
Now showing items 61-80 of 339
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Determination of Fatigue Resistance of Coupler Connections in Aluminum Overhead Truss Structures
(University of Kansas Center for Research, Inc., 2020-08)Overhead truss sign structures (OHTSS) are widely used over highways across the nation. An overhead truss sign structure is comprised of a truss and two supporting frames at each end, and can be made using aluminum or ... -
Dynamic Performance of Cantilevered Sign Trusses for Fatigue
(University of Kansas Center for Research, Inc., 2019-07)Cantilevered overhead sign structures (COSS) experience cyclic loading due to stochastic loads such as natural wind gusts (NWG). Wind loading can produce large deflections in the cantilever and large-magnitude stresses can ... -
Skewed Steel Bridges, Part II: Cross-Frame and Connection Design to Ensure Brace Effectiveness
(University of Kansas Center for Research, Inc., 2017-03)Skewed bridges in Kansas are often designed such that the cross-frames are carried parallel to the skew angle up to 40°, while many other states place cross-frames perpendicular to the girder for skew angles greater than ... -
Skewed Steel Bridges, Part I: Effect of Cross-Frame Layout on Lateral Flange Bending Stresses
(University of Kansas Center for Research, Inc., 2015-09)Lateral flange bending stresses can arise from a number of sources, such as wind loading or eccentric concrete placement, but of particular interest are lateral flange bending stresses, fl, that occur due to skew. Lateral ... -
Repair of Distortion-Induced Fatigue Damage in Bridge No. 135-87 (043SB and 044NB) Using Newly-Developed Strengthening Schemes
(University of Kansas Center for Research, Inc., 2015-09)A steel girder twin bridge structure located near Park City, Kansas has experienced extensive distortion-induced fatigue cracking in its web gap regions. Due to the bridge’s skewed, staggered configuration, the majority ... -
Improving Infrastructure Sustainability II: Repairing Existing Fatigue Cracks in Steel Bridges Using CFRP Materials
(University of Kansas Center for Research, Inc., 2015-09)Distortion-induced fatigue affects a large number of bridges of the US highway system. This type of damage is commonly observed at connections between cross-frames and steel girders. The differential displacement induced ... -
Improving Infrastructure Sustainability I: Extending Useable Lives of Steel Bridges by Halting Distortion-Induced Fatigue Crack Propagation Using Pretensioned Bolts and Plate Washers
(University of Kansas Center for Research, Inc., 2015-09)Drilling crack-arrest holes to halt fatigue crack propagation is a simple technique that is commonly used by bridge owners controlling and/or repairing fatigue cracking in steel bridges. Well-established relationships exist ... -
Earthquake-Resistant T-Shaped Concrete Walls with High-Strength Steel Bars
(University of Kansas Center for Research, Inc, 2020-08)This study examined the effects of the mechanical properties of high-strength reinforcement on the seismic behavior of concrete walls. The primary variables were the nominal yield strength fy, 100 ksi (690 MPa) or 120 ksi ... -
Recommended Provisions and Commentary on Development Length for High-Strength Reinforcement in Tension
(University of Kansas Center for Research, Inc., 2020-08)Design provisions on development length for straight reinforcing bars in tension are presented in code format and compared with those in ACI 318-14 (Building Code Requirements for Structural Concrete) and fib MC2010 (fib ... -
Reinforced Concrete Coupling Beams with High-Strength Steel Bars
(University of Kansas Center for Research, Inc., 2020-08)The use of high-strength steel bars in reinforced concrete coupling beams has the potential to reduce reinforcement congestion and support more efficient design and construction methods. A series of tests was conducted to ... -
Durability, Construction, and Early Evaluation of Low-Cracking High-Performance Concrete (LC-HPC) Bridge Decks
(University of Kansas Center for Research, Inc., 2020-06)Laboratory evaluations of concrete mixtures based on specifications for low-cracking high-performance concrete (LC-HPC) incorporating internal curing (IC) and supplementary cementitious materials (SCMs) are described. In ... -
Effects of Deicing Salts on the Durability of Concrete Incorporating Supplementary Cementitious Materials
(University of Kansas Center for Research, Inc., 2020-05) -
Headed and High-Strength Shear Reinforcement in Concrete Members
(University of Kansas Center for Research, Inc., 2020-05)Results are reported from 29 large-scale tests of reinforced concrete beams designed to investigate the use of Grade 80 (550) steel and headed deformed bars as shear reinforcement, both of which are expected to alleviate ... -
Diagonally-Reinforced Concrete Coupling Beams with High-Strength Steel Bars
(University of Kansas Center for Research, Inc., 2020-05)The use of high-strength steel in diagonally reinforced coupling beams was investigated with the aims of minimizing reinforcement congestion and increasing the maximum permissible design shear stress without compromising ... -
Corrosion Resistance of Stainless Steel Clad Reinforced Bars
(University of Kansas Center for Research, Inc., 2019-09)The corrosion resistance of No. 6 Type 316 stainless steel clad bars produced by Commercial Metals Company (CMC) was evaluated using the rapid macrocell and cracked beam tests (15 and 96 weeks, respectively), as described ... -
Topology Optimized Reinforced Concrete Walls Constructed with 3D Printed Formwork
(University of Kansas Center for Research, Inc., 2020-01)The construction industry continually evolves to adapt to gains in knowledge, market pressures and new technologies. However, two promising new technologies, 3D printing and computational topology optimization, have not ... -
Implementation of Crack-Reducing Technologies for Concrete in Bridge Decks: Synthetic Fibers, Internal Curing, and Shrinkage-Reducing Admixtures
(University of Kansas Center for Research, 2020-01)Technologies to reduce cracking in bridge decks, including shrinkage-reducing admixtures (SRAs), shrinkage-compensating admixtures (SCAs), fiber reinforcement, and internal curing (IC), are evaluated based on laboratory ... -
Headed Reinforcing Bars: CCT Node Tests, Design Provisions, and Evaluation of a Granular Micromechanics Model for Use in Finite Element Analysis of Bond
(University of Kansas Center for Research, Inc., 2019-12)The anchorage behavior of headed bars at the end of beams within compression- compression-tension (CCT) nodes subjected to monotonic loading is assessed. The test parameters for the 10 specimens tested include the embedment ... -
Behavior of Biaxially Loaded Slab-Column Connections with Shear Studs
(American Concrete Institute, 2015-06)Results are presented from four non-prestressed concrete slabcolumn connection subassemblies tested under simulated gravity and earthquake-type loading. Each specimen consisted of a largescale first-story interior slab-column ... -
Corrosion Performance of Epoxy-Coated MMFX Bars
(University of Kansas Center for Research, Inc., 2018-10)The corrosion resistance of coated ASTM A1035 Type CL (2% Cr) and CM (4% Cr) steel bars produced by MMFX Technologies were evaluated in both cracked and uncracked concrete as well as in the rapid macrocell test. Coated ...