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  • The Marcus H. Ansley Structures Research Center, located at Innovation Park in Tallahassee, Florida is a structural research and testing facility for the Florida Department of Transportation. The primary mission of the Structures Research Center is to provide research, testing, and evaluation of innovative structural components and bridge systems along with testing existing inventory to provide for safe, reliable, and cost efficient structures across the State's highway system.
  • Our vision is to provide the Department the highest quality technical expertise in the field of structural research and structural testing.


  • Fiber-Reinforced Concrete (FRC) Railing Project
    Posted: November 30th, 2020

The main objective of this study is to investigate fiber-reinforced concrete (FRC) as a possible means of eliminating the need for installation of a rebar cage (consisting of flexural and shear steel reinforcing bars) in the FDOT 36-in. single-slope traffic railing. Instead of traditional rebar-reinforcement, the improved mechanical properties of FRC are relied upon as a primary form of reinforcement within the concrete traffic railing. Pendulum impact testing has been used to investigate the structural adequacy of an FRC bridge railing, relative to a traditional rebar-reinforced concrete railing. The videos above were captured with a high-speed camera during a full-scale pendulum impact test on an FRC traffic railing, where minimal levels of deflection and damage were observed.

  • Tapered Bearing Pad Project
    Posted: July 13th, 2020

    The objective of this project is to evaluate aspects of tapered elastomeric bridge bearing pad design, production, and behavior in order that appropriate departmental policy regarding the use of such pads can be established. In order to evaluate design properties, flat and tapered bearing pads with various slopes are tested using a special-purpose test setup to study the effect of taper on axial and shear stiffness properties. The effect of taper on slip behavior of pads is also being studied. Based on the data obtained from the physical testing, recommendations for bridge design using tapered pads will be provided.

  • Stainless Steel Strands and Lightweight For Pretension Concrete Girder
    Posted: October 8th, 2019 
    Plain Fiber

    Duplex high-strength stainless steel (HSSS) strands Grade 2205 are a viable alternative material in prestressed concrete members in harsh environments due to their high corrosion resistance. The objectives of this research are to provide insight into the design and fabrication of girders with 0.6-in. duplex high-strength stainless steel strands, to study the flexural behavior of girders prestressed with stainless steel strands and compare experimental results with those of control girders

  • Fiber-Reinforced Concrete for Bridge Impact Railing: Small-Scale Testing
    Posted: February 26, 2019 
    Plain Fiber

    The objective of this project is to develop an FRC mix that can be utilized in slip form construction of bridge rails, and provide enough resistance and durability to warrant the exclusion of longitudinal rebar in the bridge rail design. In order to evaluate impact resistance, physical tests should be dynamic in nature. This first set of impact tests on small-scale slab specimens is intended to evaluate the developed mix for mechanical properties such as strength, toughness, fragmentation, fiber pullout or rupture, etc. If the results are favorable, full-scale testing of standard FDOT bridge rail geometry will ensue..

  • Large Bars Spliced in UHPC Project
    Posted: February 19, 2019 
    LargeBar2 LargeBar3 LargeBar4

    Ultra-high performance concrete (UHPC)  has a high early strength, requires less development or splice length than conventional concrete and has been previously used in the superstructures of many accelerated construction projects. UHPC also has a discontinuous pore structure that reduces liquid ingress, significantly enhancing durability compared to conventional concrete. Although UHPC has been researched extensively, previous research for reinforcing bar splice and development lengths has focused on #9 and smaller diameter bars and has not addressed the larger diameter bars used for substructures.  This research project addresses single bar splice capacity for a range of variables, including bar size, splice length and construction tolerances. The bar sizes considered are #8 through #11 bars, which are typical for substructure construction.

  • Steel data-sf-ec-immutable="" Straddle Bents
    Posted: February 14, 2019 
    SteelStraddleBent2 SteelStraddleBent3
    Steel straddle bents are becoming more popular to solve bridging over complicated roadway alignments.  While LRFD briefly addresses a temperature gradient in steel structures, it does not contemplate structures with the complexities of steel straddle bents.    To prepare for the field monitoring of a steel straddle bent and develop FEM techniques; an experimental program is being performed at the FDOT Structures Research Center (SRC).    Specific goals of these tests are to evaluate instrumentation, monitoring, data collection,  temperature profiles, shielding effects, and develop FEM techniques.

  • Florida data-sf-ec-immutable="" Slab Beam with UHPC Longitudinal Joint Detail
    Posted: April 18, 2018
    Florida Slab Beam
                    with UHPC Longitudinal Joint Detail Florida Slab Beam with UHPC Longitudinal
                    Joint Detail
    Current Florida Slab Beam (FSB) standards include a cast-in-place concrete deck and longitudinal reinforced concrete joints between adjacent beams. The objective of this research is to modify current FSB details to create an optimized section utilizing a UHPC longitudinal joint between beams without the need of a cast-in-place deck and therefore expediting construction stage. The modified details will be developed and tested under static and cyclic loading schemes using small and full-scale test specimens.

  • Flexure data-sf-ec-immutable="" Tests of Piles Prestressed with Stainless Steel
    Posted: August 24, 2017
    XM-29 Test Setup
    Corrosion resistant strands are not only desirable in any environment, but are essential in extremely corrosive environments. These strands, currently required in piles set in coastal environments, are being studied for use in prestressed concrete girders. An initial testing phase took pile specimens leftover from Contract#: BDK84-977-07 and tested them in a 4-point bending setup. Each specimen was pretensioned with a different stainless steel alloy. Results will aid the development of the AASHTO girder specimens for the final testing phases.

  • Fatigue of Unbonded Post-Tensioned Tendons
    Posted: January 17, 2017
    Fret_Fatigue-1 fret-fatigue-2
    FDOT is investigating fretting fatigue life of post-tensioned tendons due to the recent policy change to use flexible fillers in post-tensioned applications. Research on post-tensioned concrete has found that the expected fatigue life of pre-stressing strand (as determined from strand-in-air tests) can be substantially reduced in post-tensioned concrete applications due to fretting fatigue of the tendon. Two reduced beam setups will be constructed to evaluate the potential for fatigue and fretting fatigue at deviation points in segmental bridges. The fatigue test will be carried out in accordance with section 960 of the FDOT Road and Bridge Specifications Manual, which recommends fatigue testing to be done following ETAG-013 Section 6.1.2-I. At the conclusion of testing, the strands and anchorages will be inspected for evidence of fatigue.

  • Proof Test for Lightweight Aluminum Bridge Deck
    Posted: March 11, 2016
    AlumaBridge1 AlumaBridge2
    A concept for an aluminum bridge deck panel for use on moveable bridges was developed by the Florida Department of Transportation in consultation with AlumaBridge, SAPA and Hardesty & Hanover, LLC. The new deck system has the potential to replace 5� deep steel open grid deck systems and provide a better, quieter riding surface and lower maintenance costs. Prior to in-service use, the structural capacity and design is being verified by the Structures Research Center.