POST-STORM RECONSTRUCTION USING RESILIENT STRUCTURE IN COASTAL - - PowerPoint PPT Presentation

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POST-STORM RECONSTRUCTION USING RESILIENT STRUCTURE IN COASTAL - - PowerPoint PPT Presentation

Jun 18, 2023 251 likes •488 views

POST-STORM RECONSTRUCTION USING RESILIENT STRUCTURE IN COASTAL AREAS FLORIDA SHORE AND BEACH PRESERVATION ASSOCIATION T EC H C O N F E R E N C E , F E B R UA RY 2 0 1 8 Vanessa Benzecry, E.I ., Antonio Nanni, Ph.D., P.E ., Civil,

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SLIDE 1

POST-STORM RECONSTRUCTION USING RESILIENT STRUCTURE IN COASTAL AREAS

FLORIDA SHORE AND BEACH PRESERVATION ASSOCIATION

T EC H C O N F E R E N C E , F E B R UA RY 2 0 1 8

Vanessa Benzecry, E.I., Antonio Nanni, Ph.D., P.E., Civil, Architectural and Environmental Engineering, University of Miami Steven Nolan, P.E., Florida Department of Transportation

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SLIDE 2

71% of Earth’s Surface is Water

  • Urban development near the water

is inevitable

  • Water is an important factor in the

development of communities

  • Populations in coastal zones

continue to increase

VANESSA BENZECRY, E.I., UNIVERSITY OF MIAMI

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SLIDE 3

Population Increase

VANESSA BENZECRY, E.I., UNIVERSITY OF MIAMI

Percentage Increase in Coastal and Non-coastal Population by Time Period Coastal Population Growth between 1980 and 2003

Source: U.S. Census Bureau

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SLIDE 4

Coastal Structures are Vulnerable

  • Located in highly aggressive

environment

  • Exposed to hazards
  • Non-resilient
  • Low durability
  • At risk

VANESSA BENZECRY, E.I., UNIVERSITY OF MIAMI

Downtown Miami during Hurricane Irma

Source: USA Today

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SLIDE 5

Hurricanes and their Damages

VANESSA BENZECRY, E.I., UNIVERSITY OF MIAMI

Coastline Counties Most Frequently Hit By Hurricanes from 1960 to 2008

Source: U.S. Census Bureau

National Damages from Hurricanes and Storms

Source: NHC NOAA

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SLIDE 6

Damages from Hurricane Irma

VANESSA BENZECRY, E.I., UNIVERSITY OF MIAMI

Collapsed Seawall due to Hurricane Irma in Punta Gorda, FL.

Source NBC2 News

Dock Damaged by Hurricane Irma in Islamorada, FL.

Source Thestar.com

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SLIDE 7

Corrosion

  • Failure mechanism for structures

exposed to aggressive environments is

  • ften corrosion of steel reinforcement
  • Chlorides from seawater penetrate

concrete and reach steel

  • Through cracks
  • Through concrete porosity
  • Corrosion is accelerated by carbonation
  • f concrete that lowers the pH

VANESSA BENZECRY, E.I., UNIVERSITY OF MIAMI

Bridge Piling with Damage Caused by Reinforcement Corrosion.

Picture from NACE international

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SLIDE 8

Corrosion

VANESSA BENZECRY, E.I., UNIVERSITY OF MIAMI

Bulkhead cap with reinforcement corrosion.

Picture from Duoguard.

Miami Marine Stadium, beam with spall and corroded reinforcement.

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SLIDE 9

Current Mitigation Methods

Traditional corrosion mitigation efforts focus on keeping chlorides from getting to the reinforcing steel or simply delaying the time

  • Admixtures
  • Increase Concrete Cover
  • Alter Concrete Mix
  • Membranes & Overlays
  • Epoxy coated or Stainless Steel
  • Cathodic Protection

VANESSA BENZECRY, E.I., UNIVERSITY OF MIAMI

Cathodic Protection

Source: CLR Concrete Repairs Limited

Stainless Steel Rebars

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SLIDE 10

Engineer’s Responsibilities

  • Problem solving
  • Meet societal needs
  • Safety and welfare of the public
  • Minimize environmental impacts

VANESSA BENZECRY, E.I., UNIVERSITY OF MIAMI

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SLIDE 11

Creating a Resilient Structure

VANESSA BENZECRY, E.I., UNIVERSITY OF MIAMI

Before Hurricane Irma After Hurricane Irma – Current Conditions

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SLIDE 12

I-Dock: A Resilient Coastal Structure

  • A post-hurricane reconstruction project
  • Designed to resist category 4 hurricanes
  • Use of SEACRETE™ and SEABAR™

VANESSA BENZECRY, E.I., UNIVERSITY OF MIAMI

 Seacrete™: Sustainable concrete using seawater, salt-contaminated aggregates, and non-corrosive reinforcement

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SLIDE 13

Seabar™

SEABAR™: non-corrosive reinforcement with superior performance in chloride-contaminated environments  SEABAR™ includes Glass Fiber Reinforced Polymers (GFRP), Carbon Fiber Reinforced Polymers (CFRP) and Basalt Fiber Reinforced Polymers (BFRP) bars.

VANESSA BENZECRY, E.I., UNIVERSITY OF MIAMI

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SLIDE 14

Seabar™ Advantages

  • Non-corrosive
  • High strength-to-weight ratio
  • Ease of application &

installation

  • ¼ the weight of steel
  • Transparent to magnetic fields

and radar frequencies

  • Electrically and thermally non-

conductive

VANESSA BENZECRY, E.I., UNIVERSITY OF MIAMI

Construction Crew Lifting Reinforcement Cage.

Source: University of Miami

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SLIDE 15

Seabar™ Disadvantages

  • No ductility
  • Lower modulus than steel
  • No ability to bend at site
  • High CTE perpendicular to fibers
  • Lack of familiarity among engineers

and contractors

VANESSA BENZECRY, E.I., UNIVERSITY OF MIAMI

Source: University of Miami

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SLIDE 16

Design and Constructability

VANESSA BENZECRY, E.I., UNIVERSITY OF MIAMI

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SLIDE 17

Final Product Look

VANESSA BENZECRY, E.I., UNIVERSITY OF MIAMI

Dinner Key Marina in Miami, FL

Source: GEF Innovative Solutions in Fiberglass

Panama City Beach Pier

Picture from Steven Nolan.

Miamarina, Miami FL

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SLIDE 18

I-Dock Advantages

  • Coastal structure that can withstand hurricane wind and wave forces
  • Smart use of natural resources: seawater
  • High durability: life expectancy 75+ years
  • More tolerant habitat for marine life

VANESSA BENZECRY, E.I., UNIVERSITY OF MIAMI

Seacrete™ specimens

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SLIDE 19

Other Applications

Any coastal structure:

  • Seawalls
  • Bulkhead caps
  • Docks
  • Marinas
  • Breakwater
  • Bridges

VANESSA BENZECRY, E.I., UNIVERSITY OF MIAMI

FDOT Bridge Substructure Rehabilitation

Source:FDOT

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SLIDE 20

Projects with FRP Reinforcement

VANESSA BENZECRY, E.I., UNIVERSITY OF MIAMI

FDOT Bulkhead Rehabilitation Project. GFRP Used in Concrete Cap and Fascia Panels

Source: FDOT

FDOT Bridge Rehabilitation project. GFRP and CFRP Used in Concrete Deck

Source: University of Miami

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SLIDE 21

Conclusion

  • Eliminates the issue of corrosion in reinforced concrete
  • Smart use of natural resources
  • Light-weight reinforcement and smaller cross section: facilitate

transportation and construction

  • Resilient coastal structure
  • Less harmful to the environment
  • Cost-effective: long- term investment

VANESSA BENZECRY, E.I., UNIVERSITY OF MIAMI

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SLIDE 22

Questions?

Thank you!

VANESSA BENZECRY, E.I., UNIVERSITY OF MIAMI