2013 Session: 249

• Structural Response of Low-Fill Box Culvert Under Static and Traffic Loading
  Abstract: Box structures have been commonly used underneath highways. They are installed at grade or at great depths. When a box culvert is buried at a shallow depth, vertical pressure and impact due to traffic load transferred onto the roof of the culvert can induce deflections of the culvert. The effect of traffic load on the response of the culvert depends not only on the magnitude, pattern, and speed of the traffic load but also on the pavement structure. To investigate these factors, a reinforced concrete box culvert under three roadway sections (concrete pavement, concrete shoulder, and unsurfaced fill) was tested under static and traffic loads. The total thickness of pavement layers was 26 inches within the pavement section and decreased gradually towards the end of the culvert through the shoulder and the unsurfaced section. The culvert was instrumented with displacement transducers and strain gauges under the roof and pressure cells on top of the roof within the unsurfaced fill. A low-boy truck with a known axle configuration and load was used to apply seven static load combinations and traffic loads at different speeds. Deflections under the roof and pressures on the roof were measured. Measured strains were too small to be meaningful for analysis. The test results show that the magnitudes of the deflections of the culvert roof under static loads were in the small to large order from the concrete pavement, the concrete shoulder, to the unsurfaced fill. The truck at a higher speed generally induced more deflections than that at a lower speed or stopped.
  Authors: Acharya, Raju; Han, Jie; Brennan, James Joseph; Parsons, Robert L.; Khatri, Deep Kumar
  Authors: Acharya, Raju; Han, Jie; Brennan, James Joseph; Parsons, Robert L.; Khatri, Deep Kumar
  Year: 2013
  Document Type: Paper
  Subject: Design; Geotechnology; Pipelines
  Session: 249
  Paper Number: 13-1113
• Comparison of Material Behavior of Steel and Synthetic Fibers in Dry Cast Application
  Abstract: This study presents the material behavior results of steel and synthetic fiber reinforced concrete. ASTM C1609 flexural beam test and ASTM C39 compressive strength cylinder tests were completed for various fiber dosages of each synthetic and steel fiber. Synthetic and steel fiber dosages ranged from 4 lbs/yd3 to 18 lbs/yd3 and 22 lbs/yd3 to 88 lbs/yd3, respectively. From these tests, material properties were found including; compressive strength, first-peak load, peak load, Modulus of Rupture and specimen toughness. Load- deformation plots were completed for each beam to show the fiber behavior and strengthening after the initial crack.
  Authors: Abolmaali, Ali
  Authors: Abolmaali, Ali
  Year: 2013
  Document Type: Paper
  Subject: Design; Geotechnology; Pipelines
  Session: 249
  Paper Number: 13-3925
• Structural Response of Low-Fill Box Culvert Under Static and Traffic Loading
  Authors: Han, Jie
  Authors: Han, Jie
  Year: 2013
  Document Type: Presentation
  Subject: Design; Geotechnology; Pipelines
  Session: 249
  Paper Number: 13-1113
• Comparison of Material Behavior of Steel and Synthetic Fibers in Dry Cast Application
  Authors: Abolmaali, Ali
  Authors: Abolmaali, Ali
  Year: 2013
  Document Type: Presentation
  Subject: Design; Geotechnology; Pipelines
  Session: 249
  Paper Number: 13-3925
• Presiding Officer
  Authors: Harden, Chad
  Authors: Harden, Chad
  Year: 2013
  Document Type: Presentation
  Subject: Design; Geotechnology; Pipelines
  Session: 249
  Paper Number: Z13-249