A multistep design framework based on Life Cycle

A multi-step design framework based on Life Cycle Thinking for the holistic renovation of the existing buildings stock Chiara PASSONI, Alessandra MARINI, Andrea BELLERI, Costantino MENNA Department of Engineering and Applied Science, University of Bergamo, chiara. passoni@unibg. it

THE NEED FOR A SUSTAINABLE RENOVATION 50% RAW MATERIALS 35% 35% WASTE ENERGY CO 2 EMISSIONS EU TARGETS: -85% GHG EMISSIONS by 2050

THE NEED FOR A SUSTAINABLE RENOVATION SUSTAINABLE?

THE NEED FOR A SUSTAINABLE RENOVATION GREEN RETROFITTING REDUCTION OF CO 2 EMISSIONS SAVINGS ON ENERGY BILLS INCREASE OF COMFORT ENSURE SAFETY PROTECTION OF HUMAN LIFE REDUCTION OF WASTE, DOWNTIME, COSTS AND IMPACTS FOR RECONSTRUCTION OVERCOME THE BARRIERS NEED TO RELOCATE THE INHABITANTS COSTS AND LONG DURATION OF WORK DISRUPTIVE CONSTRUCTION SITE

LIFE CYCLE THINKING ECO-EFFICICENCY, COSTOPTIMIZATION, SAFETY, RESILIENCE, FEASIBILTY CONTROL OF PERFORMANCE, IMPACTS AND COSTS OVER THE LIFE CYCLE ü ü ü ü ECOMATERIALS SUST. TEHNIQUES DEMOUNTABILITY EASE OF MAINTENANCE REPARABILITY AFTER AN EARTHQUAKE MAXIMUM FLEXIBILITY ADAPTABILITY INTERVENTIONS FROM OUTSIDE design phase ? NEW PRINCIPLES ü ü DRY SOLUTIONS STANDARDIZED CONNECTIONS OFF-SITE PRODUCTION OF COMPONENTS RECYCLABLE/REUSABLE ECO-MATERIALS AND COMPONENTS

LIFE CYCLE THINKING ECO-EFFICICENCY, COSTOPTIMIZATION, SAFETY, RESILIENCE, FEASIBILTY CONTROL OF PERFORMANCE, IMPACTS AND COSTS OVER THE LIFE CYCLE ü ü ü ü ECOMATERIALS SUST. TEHNIQUES DEMOUNTABILITY EASE OF MAINTENANCE REPARABILITY AFTER AN EARTHQUAKE MAXIMUM FLEXIBILITY ADAPTABILITY ? DAMAGE CONTROL operational phase NEW PRINCIPLES ü ü DRY SOLUTIONS STANDARDIZED CONNECTIONS OFF-SITE PRODUCTION OF COMPONENTS RECYCLABLE/REUSABLE ECO-MATERIALS AND COMPONENTS

LIFE CYCLE THINKING operational phase ECO-EFFICICENCY, COSTOPTIMIZATION, SAFETY, RESILIENCE, FEASIBILTY CONTROL OF PERFORMANCE, IMPACTS AND COSTS OVER THE LIFE CYCLE ü ü ü ü ECOMATERIALS SUST. TEHNIQUES DEMOUNTABILITY EASE OF MAINTENANCE REPARABILITY AFTER AN EARTHQUAKE MAXIMUM FLEXIBILITY ADAPTABILITY NEW PRINCIPLES ü ü DRY SOLUTIONS STANDARDIZED CONNECTIONS OFF-SITE PRODUCTION OF COMPONENTS RECYCLABLE/REUSABLE ECO-MATERIALS AND COMPONENTS

LIFE CYCLE THINKING ECO-EFFICICENCY, COSTOPTIMIZATION, SAFETY, RESILIENCE, FEASIBILTY CONTROL OF PERFORMANCE, IMPACTS AND COSTS OVER THE LIFE CYCLE ü ü ü ü ECOMATERIALS SUST. TEHNIQUES DEMOUNTABILITY EASE OF MAINTENANCE REPARABILITY AFTER AN EARTHQUAKE MAXIMUM FLEXIBILITY ADAPTABILITY NEW PRINCIPLES ü ü DRY SOLUTIONS STANDARDIZED CONNECTIONS OFF-SITE PRODUCTION OF COMPONENTS RECYCLABLE/REUSABLE ECO-MATERIALS AND COMPONENTS

SUSTAINABLE RENOVATION: STATE OF THE ART COMBINED USE OF TOOLS

SUSTAINABLE RENOVATION: STATE OF THE ART COMBINED USE OF TOOLS

SUSTAINABLE RENOVATION: STATE OF THE ART COMBINED USE OF TOOLS

SUSTAINABLE RENOVATION: STATE OF THE ART COMBINED USE OF TOOLS

SUSTAINABLE RENOVATION: SECTORIAL DESIGN OF THE INTERVENTION CHOICE ENERGY UPGRADE ASSESSMENT Building in the as-is situation STRUCT. UPGRADE step 3 Building in the as-is situation FORMAL UPGRADE step 2 Building in the as-is situation PERFORMANCE OBJECTIVES QUANTITATIVE TARGETS DESIGN OF INTERVENTION - Solution A Solution B Solution C … step 1 Building in the as-is situation PERFORMANCE OBJECTIVES QUANTITATIVE TARGETS DESIGN OF INTERVENTION - Solution A Solution B Solution C COMBINED USE OF TOOLS ü “ex-post” evaluations ü express performances and losses in economic terms ü no respectful of LC principles (just CO 2)

SUSTAINABLE RENOVATION: SECTORIAL DESIGN OF THE INTERVENTION CHOICE ENERGY UPGRADE ASSESSMENT Building in the as-is situation PERFORMANCE OBJECTIVES QUANTITATIVE TARGETS DESIGN OF INTERVENTION - Solution A Solution B Solution C STRUCT. UPGRADE step 3 Building in the as-is situation PERFORMANCE OBJECTIVES QUANTITATIVE TARGETS DESIGN OF INTERVENTION - Solution A Solution B Solution C FORMAL UPGRADE step 2 Building in the as-is situation PERFORMANCE OBJECTIVES QUANTITATIVE TARGETS DESIGN OF INTERVENTION - Solution A Solution B Solution C … step 1 Building in the as-is situation PERFORMANCE OBJECTIVES QUANTITATIVE TARGETS DESIGN OF INTERVENTION - Solution A Solution B Solution C

SUSTAINABLE RENOVATION: A NEW FRAMEWORK DESIGN OF THE INTERVENTION CHOICE ENERGY UPGRADE ASSESSMENT Building in the as-is situation PERFORMANCE OBJECTIVES QUANTITATIVE TARGETS DESIGN OF INTERVENTION - Solution A Solution B Solution C STRUCT. UPGRADE step 3 Building in the as-is situation PERFORMANCE OBJECTIVES QUANTITATIVE TARGETS DESIGN OF INTERVENTION - Solution A Solution B Solution C FORMAL UPGRADE step 2 Building in the as-is situation PERFORMANCE OBJECTIVES QUANTITATIVE TARGETS DESIGN OF INTERVENTION - Solution A Solution B Solution C … step 1 Building in the as-is situation PERFORMANCE OBJECTIVES QUANTITATIVE TARGETS DESIGN OF INTERVENTION - Solution A Solution B Solution C (developed within the SAFESUST framework)

SUSTAINABLE RENOVATION: A NEW FRAMEWORK step 1 step 2 ENERGY UPGRADE CHOICE Building in the as-is situation - Solution A Solution B … Solution N PERFORMANCE OBJECTIVES QUANTITATIVE TARGETS DESIGN OF INTERVENTION - Solution A Solution B Solution C STRUCT. UPGRADE DESIGN OF THE INTERVENTION Building in the as-is situation - Solution A Solution B … Solution N PERFORMANCE OBJECTIVES QUANTITATIVE TARGETS DESIGN OF INTERVENTION - Solution A Solution B Solution C FORMAL UPGRADE step 4 Building in the as-is situation - Solution A Solution B … Solution N PERFORMANCE OBJECTIVES QUANTITATIVE TARGETS DESIGN OF INTERVENTION - Solution A Solution B Solution C … ASSESSMENT PRE-SCREEN. step 3 Building in the as-is situation - Solution A Solution B … Solution N PERFORMANCE OBJECTIVES QUANTITATIVE TARGETS DESIGN OF INTERVENTION - Solution A Solution B Solution C (developed within the SAFESUST framework)

SUSTAINABLE RENOVATION: A NEW FRAMEWORK STEP 2 PRESCREENING ALTERNATIVE A 1 ALTERNATIVE A 2 ALTERNATIVE A 3 ALTERNATIVE A 4 ALTERNATIVE A 5 SAME PERFORMANCES BUT VERY DIFFERENT ENVIRONMENTAL, SOCIAL, AND ECONOMIC IMPACTS MCDM TOOL COMPLIANT WITH SUSTAINABILITY TRIPLE BOTTOM LINE AND LCT

SUSTAINABLE RENOVATION: A NEW FRAMEWORK STEP 2 PRESCREENING CRITERIA WEIGHT MATRIX Qualitative approach, eigenvalue method (Saaty 1980) (Caterino et al. 2008) (from: Fornoni 2019) C 1 – installation costs C 2 – maintenance costs C 3 – possible additions C 4 – post-earthquake costs C 5 – downtime C 6 – duration works C 7 – architectural upgrade C 8 – energy upgrade C 9 – demountability C 10 – material sustainability

SUSTAINABLE RENOVATION: A NEW FRAMEWORK STEP 2 PRESCREENING MULTI-CRITERIA DECISION MAKING MATRIX TOPSIS method (Hwang and Yoon 1981) (Caterino et al. 2008) (from: Fornoni 2019)

SUSTAINABLE RENOVATION: A NEW FRAMEWORK ü Partial demolition of finishing, ü Relocation of inhabitants ü Operational difficulties may result in ineffectiveness ü Post earthquake rather than prevention seismic mitigation measure

SUSTAINABLE RENOVATION: A NEW FRAMEWORK STEP 3 PERFORMAN CE BASED DESIGN NEW DRIFT TARGET TO CONSIDER INTERFERENCES WITH ENERGY CLADDING NEW DRIFT TARGET TO PROTECT THE ESCAPE ROUTE

SUSTAINABLE RENOVATION: A NEW FRAMEWORK STEP 4 CHOICE Losses (+NSE AND INDIRECT LOSSES) EAL*

SUSTAINABLE RENOVATION: A NEW FRAMEWORK • holistic framework reinterpreting the 3 pillars of sustainability to foster eco-efficiency, cost-optimization, safety, resilience, and feasibility of the retrofit intervention • shift from an ex-post assessment method to an ex-ante framework including sustainability principles inspired by the LCT approach in each phase of the design (step 2) • defines of multidisciplinary performances and targets for the design of holistic solution avoiding possible interferences and exploiting possible interactions

Thank you for your attention! CHIARA PASSONI chiara. passoni@unibg. it Scan QR or download full paper at www. cesb. cz/19/ 1464