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Bridges make travel faster and more convenient, but, in an earthquake, these structures are subject to forces that can cause extensive damage and make them unsafe. Now civil and environmental engineer Petros Sideris of Texas A&M University is leading a National Science Foundation (NSF)-funded research project to investigate the performance of hybrid sliding-rocking (HSR) columns. HSR columns provide the same support as conventional bridge infrastructure columns but are more earthquake-resistant. HSR columns are a series of individual concrete segments held together by steel cables that allow for controlled sliding and rocking. This allows the columns to shift without damage, while post-tensioning strands ensure that at the end of an earthquake the columns are pushed back to their original position. Conventional bridges are cast-in-place monolithic concrete elements that are strong but inflexible. Structural damage in these bridge columns, typically caused by a natural disaster, often forces a bridge to close until repairs are completed. But bridges with HSR columns can withstand large earthquakes with minimal damage and require minor repairs, likely without bridge closures. Such infrastructure helps with post-disaster response and recovery and can save thousands in taxpayer dollars. In an earthquake, HSR columns provide "multiple advantages to the public," Sideris said. "By preventing bridge damage, we can maintain access to affected areas immediately after an event for response teams to be easily deployed, and help affected communities recover faster. In mitigating losses related to post-event bridge repairs and bridge closures, more funds can be potentially directed to supporting the recovery of the affected communities." According to Joy Pauschke, NSF program director for natural hazards engineering, "NSF invests in fundamental engineering research so that, in the future, the nation's infrastructure can be more resilient to earthquakes, hurricanes, and other forces of nature."

Image credit: Texas A&M University

At the corner of Glendale and Glenfeliz, Jeff Harmes created an art garden completely from scratch. ; Credit: Alana Rinicella

On the median on the Atwater Village side of the Hyperion bridge, Jeff Harmes built a garden. It's an act he calls "taking nothing and making it into something that everyone can get something out of, that can inspire everyone."

Having lived on the streets for 30 years, Jeff says grew to hate litter. He used to sweep street gutters with a piece of cardboard and remove trash packed into the forks of trees. He thought of them as small acts that would go mostly unnoticed.

On a whim last spring, he started tilling the median — or "the island," as he likes to call it ... although "oasis" is more like it, now. He made rock sculptures from stones he scrounged out of the L.A. River. In celebration of spring, he made a peace sign out of flowers. 

He says he doesn't know much about gardening or landscaping. He learns as he goes and looks to commuters for suggestions. In the absence of running water, he relies on rainfall.

Vibrant succulents sit next to kitschy items like gnomes and plastic flamingos. Intricate formations of seashells and stones contrast starkly against the neatly patted dirt. A young girl even donated her seashell collection for the peace sign. 

Recently, though, a vandal smashed the peace sign and wrecked Jeff's plants, including his squash crop. With help from the neighborhood, Jeff has been able to rebuild the garden. New plants have sprouted and the stonework has been repaired.

Jeff says his new goal with the garden is for people to draw something positive from it. "I want hate to be transferred into something beautiful," he said. Moving forward, he hopes to expand it down the island. 

(Note: This post has been edited. The original called it a "meridian," which is an invisible geographic line. "Median" is correct.)

This content is from Southern California Public Radio. View the original story at SCPR.org.

New sensors to monitor storm surge on bridges

New sensors to monitor storm surge on bridges

Full Text:

Bridges make travel faster and more convenient, but, in an earthquake, these structures are subject to forces that can cause extensive damage and make them unsafe. Now civil and environmental engineer Petros Sideris of Texas A&M University is leading a National Science Foundation (NSF)-funded research project to investigate the performance of hybrid sliding-rocking (HSR) columns. HSR columns provide the same support as conventional bridge infrastructure columns but are more earthquake-resistant. HSR columns are a series of individual concrete segments held together by steel cables that allow for controlled sliding and rocking. This allows the columns to shift without damage, while post-tensioning strands ensure that at the end of an earthquake the columns are pushed back to their original position. Conventional bridges are cast-in-place monolithic concrete elements that are strong but inflexible. Structural damage in these bridge columns, typically caused by a natural disaster, often forces a bridge to close until repairs are completed. But bridges with HSR columns can withstand large earthquakes with minimal damage and require minor repairs, likely without bridge closures. Such infrastructure helps with post-disaster response and recovery and can save thousands in taxpayer dollars. In an earthquake, HSR columns provide "multiple advantages to the public," Sideris said. "By preventing bridge damage, we can maintain access to affected areas immediately after an event for response teams to be easily deployed, and help affected communities recover faster. In mitigating losses related to post-event bridge repairs and bridge closures, more funds can be potentially directed to supporting the recovery of the affected communities." According to Joy Pauschke, NSF program director for natural hazards engineering, "NSF invests in fundamental engineering research so that, in the future, the nation's infrastructure can be more resilient to earthquakes, hurricanes, and other forces of nature."

Image credit: Texas A&M University

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CULPEPER — The bridge on Route 250 (Ivy Road) over Little Ivy Creek near Ivy west of Charlottesville is open to traffic, one day ahead of its scheduled reopening. Crews are now working to remove signs and other detour indicators along Route 250 and Interstate 64.

UPDATE 2: Crews need a few additional days to complete the bridge project on Route 657 (Apple Grove Road) in Louisa County due to the recent snow...

CULPEPER —  A new traffic pattern will take effect next week as construction begins on the westbound Route 211/522 (Lee Highway) bridge over the...

CULPEPER — The Virginia Department of Transportation has begun rehabilitating the Route 707 (Blair Park Road) bridge over Lickinghole Creek in...

CULPEPER — The Virginia Department of Transportation will close Route 672 (Blackwell Road) to through traffic while crews rehabilitate the bridge...

CULPEPER — The Virginia Department of Transportation invites the public to attend an upcoming design public hearing on the proposed rehabilitation...

CULPEPER — The Virginia Department of Transportation will close the Route 674 (Clark Road) bridge over a branch of the Moormans River in Albemarle...

FREDERICKSBURG , Va. – An additional evening of work is required this week for an ongoing pin replacement on the Robert O. Norris Bridge, and...

FREDERICKSBURG , Va. – An additional evening of work is required this week for an ongoing pin replacement on the Robert O. Norris Bridge, and...

NOV. 12, 2018 UPDATE: All lanes of Route 3 over the Rappahannock River between Lancaster and Middlesex counties will remain open this evening, Nov....

COLONIAL HEIGHTS —The Virginia Department of Transportation (VDOT) will hold a public hearing for a proposed rehabilitation of the Route 46...

The Gholson Bridge on Iron Bridge Road (Route 715) runs over the Meherrin River NORTH CHESTERFIELD —The Virginia Department of Transportation...

LEESBURG – The two-lane Cochran Mill Road (Route 653) bridge over Tuscarora Creek has been reduced to one lane of alternating traffic until further...

SPRINGFIELD, Va. – Drivers along the Franconia-Springfield Parkway (Route 289) bridge over Accotink Creek now have better protection from oncoming...

FAIRFAX – Due to weather delays, the closure of Popes Head Road (Route 654) between Colchester Road (Route 612) and Fairfax County Parkway (Route...

LYNCHBURG – Motorists who use Odd Fellows Road from the US 29 Business Lynchburg Expressway to access the Main Post Office, Division of Motor Vehicles or other businesses/organizations in the immediate area will need to use alternate routes beginning Monday, October 8. The bridge on Odd Fellows Road over the railroad will be closed for approximately one year beginning that date for replacement.

LYNCHBURG —Over a week after the rain and wind of Tropical Storm Michael took aim on the Commonwealth, the Virginia Department of Transportation continues to assess roads and bridges in the Lynchburg District affected by the storm. By the time Michael exited the area, over 220 road and 360 structures were under water and as of today (Friday, October 19) only six short-term closures, in addition to the long-term closures below, remain.

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