具身认知的实用策略结构设计中的碳减排.pdf

1、Practical Strategies for Embodied Carbon Reduction in Structural DesignWorld Green Building Council Global Status Report 201832%23%6%IndustryBuildings OperationsTransportationBuildings Materialsand ConstructionOther11%Embodied carbon28%Operational carbon39%Constructionsector carbonemissionsHow Impac

2、tful is Embodied Carbon?6%Emissions attributed to structuresCalculating Embodied CarbonQUANTITY x GWP FACTOR=EMBODIEDCARBONReducing Embodied CarbonUse LessUse New Low-Carbon Materials Design OpportunityTraditional ApproachRecent ApproachUse Normalweight Concrete In Lieu of LightweightLightweight con

3、crete typically has an 80%carbon premium and 10%cost premium per cubic yard compared to normalweight concrete University of Michigan Case StudyProject baseline scheme of CLT on steel framingTypical scheme of 3.25 LWC on 3 deckAlternate of 3 NWC on 3 deck Kohn Pedersen FoxUse of Normalweight Concrete

4、 Slab on Deck3.25 LWC 3 DeckSteel Beams with SFRM3 NWC 3 Deck w/SFRMSteel Beams with SFRM3 Gypcrete6.875 CLTSteel Beams with Intumescent PaintAssumes 2 hr exposed timberAssumes 2 hr fire rating requiredAssumes 2 hr fire rating requiredBaseline Scheme88kgCO2e/m2NWC+MD92kgCO2e/m2(+4.5%)Typical LWC+MD1

5、17kgCO2e/m2(+33%)University of Michigan Case StudyUse of Normalweight Concrete Slab on Metal DeckSpecify Low GWP Insulation Insulation for Structural ApplicationsXPS(Extruded Polystyrene)Legacy XPS:Highest GWP by far due to HFCsLow-GWP XPS available,related to recent state&federal regulationsEPS(Exp

6、anded Polystyrene)Significantly lower GWP(13x)than legacy XPS,but not as durable Polyiso Lowest GWP and similar durability as XPSMore expensive than alternativeshttps:/ Built-up slab on void former was replaced with slab on deckRevised deta