165 research outputs found
Ecological Payback Time of an Energy-Efficient Modular Building
Ecological payback time was calculated for demolishing an existing commercial building with average energy performance and replacing it with an energy-efficient, prefabricated building. A life-cycle assessment was performed for a 5,000 ft2 commercial building designed by Project Frog and prefabricated in San Francisco, California, and compared to the impacts of annual energy consumption and continued status quo operation of a comparable average commercial building. Scenarios were run both with and without rooftop solar panels intended to make the prefabricated building net zero energy. The analysis considers the materials and mof the existing building, compared to continued annual energy use of the existing an existing commercial building was found to be roughly eleven years, and a building with enough rooftop solar to be net zero energy was roughly 6.5 years. The full EcoIndicator99 environmental impact payback for a new efficient building with no solar was found to be twenty years, and a solar net-zero building was roughly eleven years against operation of an existing commercial building
Multi-physics corrosion modeling for sustainability assessment of steel reinforced high performance fiber reinforced cementitious composites
Using Life Cycle Assessment Methods to Guide Architectural Decision-Making for Sustainable Prefabricated Modular Buildings
Within this work, life cycle assessment modeling is used to determine top design priorities and quantitatively inform sustainable design decision-making for a prefabricated modular building. A case-study life-cycle assessment was performed for a 5,000 ft2 prefabricated commercial building constructed in San Francisco, California, and scenario analysis was run examining the life cycle environmental impacts of various energy and material design substitutions, and a structural design change. Results show that even for a highly energy-efficient modular building, the top design priority is still minimizing operational energy impacts, since this strongly dominates the building life cycle\u27s environmental impacts. However, as an energy-efficient building approaches net zero energy, manufacturing-phase impacts are dominant, and a new set of design priorities emerges. Transportation and end-of-life disposal impacts were of low to negligible importance in both cases
Multi-physical and multi-scale deterioration modelling of re-inforced concrete: modelling corrosion-induced concrete damage
Probabilistic Design and Management of Sustainable Concrete Infrastructure Using Multi-Physics Service Life Models
Crack Resistant Concrete Material for Transportation Construction
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/84828/1/Li_TRB2004.pd
Coupled hygrothermal, electrochemical, and mechanical modelling for deterioration prediction in reinforced cementitious materials
In this paper a coupled hygrothermal, electrochemical, and mechanical modelling
approach for the deterioration prediction in cementitious materials is briefly outlined.
Deterioration prediction is thereby based on coupled modelling of (i) chemical processes
including among others transport of heat and matter as well as phase assemblage on the nano and
micro scale, (ii) corrosion of steel including electrochemical processes at the
reinforcement surface, and (iii) material performance including corrosion- and load-induced damages
on the meso and macro scale. The individual FEM models are fully coupled, i.e.
information, such as such as corrosion current density, damage state of concrete cover, etc.,
are constantly exchanged between the models
Shotcreting with ECC
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/84822/1/Li_Fischer_Lepech_Shotcreting.pd
Probabilistic design framework for sustainable repari and rehabilitation of civil infrastructure
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