Department of Homeland Security to Test U.S. Bridges for Vulnerability

U.S. Department of Homeland Security to test U.S. Bridges for Vulnerability

The Department of Homeland Security’s Science and Technology Directorate (S&T) has joined forces with the Federal Highway Administration and the U.S. Army Corps of Engineers Engineer Research and Development Center to conduct series of experiments that assess potential vulnerability of critical structural components of aging steel bridges.

The research will work to address how materials, connection details and designs in aging bridges react to IEDs, other explosives, kinetic impact, intense fires and other accidents. In addition to vulnerability analysis, DHS S&T is funding several complementary efforts that investigate advances in effective and affordable ways to strengthen bridges. Data obtained through such research will help update computational models, and may be integrated into engineering software for construction of more durable bridges.

More than 600,000 bridges in the U.S are 20 feet long or longer, some over a century old, and many of them national iconic monuments. Bridges slated for demolition are hard to come by, says S&T Transportation Security Laboratory’s Tom Coleman. However, last year the research team found out that the Ft. Steuben Bridge, a vintage 1929 suspension bridge in Steubenville, Ohio, was to undergo demolition in 2012. With the Ft. Steuben Bridge closed to traffic, there was a unique opportunity to conduct onsite tests. “We developed a way to perform controlled impact testing on the bridge using a specially designed cold gas thruster device,” said Coleman. “Lateral impact loads were directed at specific locations on the main cable and forces transmitted to the rest of the structure were monitored in real time. This testing, along with similar experiments performed a few years ago on the Waldo Hancock Bridge in Maine, will help us learn bridge behavior and develop mitigation measures to better prevent damage.”

In a laboratory, it’s nearly impossible to replicate the myriad dynamic and static forces that interact within a bridge structure. Opportunities to conduct field tests at the Ft. Steuben have made it possible to gain better knowledge of in-situ bridge behavior. In addition to the onsite testing, cables and steel tower sections were recovered from the Ft. Steuben Bridge following its recent demolition. These specimens will be assessed to determine material characteristics and vulnerabilities during blasts, and to further develop mitigation measures.

“Our current work is quite unusual because we are testing actual vintage bridge components from long-span bridges, as opposed to newly manufactured samples,” says John Fortune, S&T’s Bridge Vulnerability Project Manager. “The results will help us predict susceptibility to different threats and develop effective, feasible technologies to protect the Nation¹s bridges. We are developing innovative approaches that will protect iconic bridges from hazards, and also aid in building smarter, more secure bridges for the future.”

Most U.S. bridges are owned by regional authorities, state departments of transportation, private authorities, county authorities, or local municipalities. These bridges are designed using codes and standards approved by the American Association of State Highway Transportation Officials (AASHTO), whose membership includes State DOTs and other bridge owners.

The work taking place will be shared with AASHTO and specific bridge owners and operators to ensure that project results will be available to engineers responsible for building new bridges and renovating existing ones.

 

Featured

  • Making the Grade with Locks and Door Hardware

    Managing and maintaining locks and door hardware across a school district or university campus is a big responsibility. A building’s security needs to change over time as occupancy and use demands evolve, which can make it even more challenging. Knowing the basics of common door hardware, including locks, panic devices and door closers, can make a difference in daily operations and emergency situations. Read Now

  • Choosing the Right Solution

    Today, there is a strong shift from on-prem installations to cloud or hybrid-cloud deployments. As reported in the 2024 Genetec State of Physical Security report, 66% of end users said they will move to managing or storing more physical security in the cloud over the next two years. Read Now

  • New Report Reveals Top Security Risks for U.S. Retail Chains

    Interface Systems, a provider of security, actionable insights, and purpose-built networks for multi-location businesses, has released its 2024 State of Remote Video Monitoring in Retail Chains report. The detailed study analyzed over 2 million monitoring requests across 4,156 retail locations in the United States from September 2023 to August 2024. Read Now

  • Gaining a Competitive Edge

    Ask most companies about their future technology plans and the answers will most likely include AI. Then ask how they plan to deploy it, and that is where the responses may start to vary. Every company has unique surveillance requirements that are based on market focus, scale, scope, risk tolerance, geographic area and, of course, budget. Those factors all play a role in deciding how to configure a surveillance system, and how to effectively implement technologies like AI. Read Now

Featured Cybersecurity

Webinars

New Products

  • Camden CV-7600 High Security Card Readers

    Camden CV-7600 High Security Card Readers

    Camden Door Controls has relaunched its CV-7600 card readers in response to growing market demand for a more secure alternative to standard proximity credentials that can be easily cloned. CV-7600 readers support MIFARE DESFire EV1 & EV2 encryption technology credentials, making them virtually clone-proof and highly secure. 3

  • Connect ONE’s powerful cloud-hosted management platform provides the means to tailor lockdowns and emergency mass notifications throughout a facility – while simultaneously alerting occupants to hazards or next steps, like evacuation.

    Connect ONE®

    Connect ONE’s powerful cloud-hosted management platform provides the means to tailor lockdowns and emergency mass notifications throughout a facility – while simultaneously alerting occupants to hazards or next steps, like evacuation. 3

  • A8V MIND

    A8V MIND

    Hexagon’s Geosystems presents a portable version of its Accur8vision detection system. A rugged all-in-one solution, the A8V MIND (Mobile Intrusion Detection) is designed to provide flexible protection of critical outdoor infrastructure and objects. Hexagon’s Accur8vision is a volumetric detection system that employs LiDAR technology to safeguard entire areas. Whenever it detects movement in a specified zone, it automatically differentiates a threat from a nonthreat, and immediately notifies security staff if necessary. Person detection is carried out within a radius of 80 meters from this device. Connected remotely via a portable computer device, it enables remote surveillance and does not depend on security staff patrolling the area. 3