Viaduct-like roman aqueducts, more than 1 arch; girder-like flat highway bridge; arch-one big arch; cable stay-like suspension
Point 2: Lower energy input, increased durability, and simplified deconstruction
84 solar panels power LED lights, connected to grid: can give or take energy to/from grid
Pedestrian bridge that doesn’t disturbe Singapore forest
photovoltaic-sheathed skyscrapers, a wind turbine-studded skybridge, sea water heating and cooling systems, and radiant floor heating
Walkway above forest canopy and wildlife!
hydroponic vertical farm, public organic food markets, photovoltaic sheathing, a vertical wind turbine, rainwater collection and greywater treatment and recycling
How can wedesignsustainablebridges?Annie FarbmanLeslie Tillman
Why sustainable bridges? Sustainablebridge design is important looking into the future! Decreasing carbon footprint Increasing lifetime and use of important civil infrastructure We chose this topic because: Annie wants to build bridges and… Leslie wants to make infrastructure sustainable!
Materials Selection Concrete: Durable, cheap, abundant, pre-cast Green-Star certified concrete mix plants, high performance or environmentally friendly concrete Steel Can be recycled steel material, reusable Aluminum Resistant to corrosion=longer life Lighter=able to bear larger loads Fiber reinforced polymer (FRP) Highly resistant to corrosion Increased strength to weight ratio
Design & ConstructionLow energy input-depends on low environmental impactIncreased durability Longer lifespan, less waste, labor/maintenance, more cost efficientSimplified deconstruction Aids in ability to be repurposed
Rehabilitation, Demolition andReplacement Steel bridges can use bolted connections for easy deconstruction Bridge preservation or component reuse
Facilitating Sustainable Bridges Service life extension Investigate and develop new specs Better management, strengthening and repairing systems Review past/current projects focusing on more sustainable design Need to focus more on end phase Repairing and rehabilitating
Solar-powered, Inhabitedredesigned London BridgeConcept
Reflection Leslie:New innovative bridges can improve functionality and decrease the environmental impact. Annie: I believe we can easily learn from failed or existing infrastructure in order to design for the future. Our question doesn’t affect us as female engineers, but everyone should be designing for a sustainable future, including lots of women!
References 1. http://macrete.com/downloadResource?id=81 2. http://www.technologyreview.com/Energy/21117/ 3. http://inhabitat.com/top-5-most-innovative-green-bridges-on-the-planet/ 4. ftp://ftp.wsdot.wa.gov/public/Bridge/WBES2009/B/2B2/2B2.pdf 5. http://wpage.unina.it/cosenza/paper/FRP%20Composites%20for%20Constru ction.pdf 6. http://www.sustainablebridges.net/ 7. http://www.fhwa.dot.gov/publications/publicroads/97spring/high.cfm 8. Ruiz-Teran, Ana M, and Angel C Aparicio. "Developments In Under-Deck And Combined Cable-Stayed Bridges." Bridge Engineering 163.2 (2010): 67- 78. Academic Search Premier. Web. 2 May 2012 9. Jim Kirkpatrick, et al. "Sustainable Bridge Construction Through Innovative Advances." Bridge Engineering 161.4 (2008): 183-188. Academic Search Premier. Web. 2 May 2012. 10. Martin, A. J. "Concrete Bridges In Sustainable Development." Engineering Sustainability 157.4 (2004): 219-230. Academic Search Premier. Web. 2 May 2012.