자료유형  

 학위논문

Control Number  

0017162917

International Standard Book Number  

9798384211112

Dewey Decimal Classification Number  

300

Main Entry-Personal Name  

Broyles, Jonathan Michael.

Publication, Distribution, etc. (Imprint  

[S.l.] : The Pennsylvania State University., 2024

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2024

Physical Description  

430 p.

General Note  

Source: Dissertations Abstracts International, Volume: 86-03, Section: A.

General Note  

Advisor: Brown, Nathan C.

Dissertation Note  

Thesis (Ph.D.)--The Pennsylvania State University, 2024.

Summary, Etc.  

요약The building and construction sector contributes 35-40% of global carbon emissions, with concrete attributed to around 7% of global carbon emissions. With the substantial volume of concrete used in building floor systems, design practitioners and engineers are increasingly tasked to identify concrete floor systems with the least amount of embodied carbon (EC) emissions. A prominent EC reduction pathway is through the removal of structurally unnecessary concrete material in floors. This low-carbon pathway is directly applicable in the selection of more material-efficient concrete floor systems in buildings, as several concrete systems exist that are more material-efficient than conventional concrete slabs. Further concrete material reductions can be realized at the component scale when optimization frameworks are employed to determine non-traditional floor forms that improve upon the material efficiency of conventional systems. While existing concrete floor systems can reduce the EC emissions by up to 50%, greater EC savings can be achieved through the design of optimized components. However, challenges have hindered both the selection of low-carbon conventional concrete floor systems and the realization of optimized components.Material-efficient concrete floor systems have been designed, engineered, and constructed for many years; however, identifying the floor system with the lowest EC emissions has been restricted due to the variety of floor system types, the bevy of possible design scenarios, and the uncertainty of the carbon footprint of concrete mixtures. Additionally, the selection of a low-carbon floor system can happen in early-stage design phases, potentially restricting the consideration of alternative systems, especially when design parameters are loosely defined. Furthermore, the design of a concrete floor system may be controlled by non-structural objectives. Secondary objectives such as fire-resistance, acoustic insulation, and vibrations may influence the design of a concrete floor structure, further complicating the selection of a low-carbon concrete system. These limitations currently impede how designers can identify which concrete floor system has the largest EC savings when considering various design scenarios and performance goals.While optimized concrete components have been found to achieve material savings up to 70% when compared to conventional concrete slabs, their implementation has been restricted because floors influence additional design performance goals. Several researchers have evaluated how secondary considerations, like walking vibrations, can be influenced by the design of optimized components, yet air- and structure-borne insulation performance has been less studied. Although air-borne sound insulation of optimized concrete floors can be adequately estimated using analytical expressions, a high-resolution numerical model is necessary to quantify impact sound insulation. However, computational resource restrictions limit simulating the full-frequency radiated sound power needed to evaluate impact insulation. An additional challenge when evaluating optimized floors for acoustic insulation is that the existing sound transmission metrics have known functional limitations that can inflate or penalize the true acoustic performance of a concrete component. As a result of these challenges, little research has evaluated the performance of optimized concrete components for acoustic performance and other design goals.This dissertation responds to these research gaps by deriving equations and design tools to aid in the selection of a low-carbon concrete floor system, developing a new simulation method to quantify impact sound insulation, and proposing new sound transmission metrics to improve the acoustic assessment of optimized concrete components.

Subject Added Entry-Topical Term  

Load.

Subject Added Entry-Topical Term  

Software.

Subject Added Entry-Topical Term  

Flooring.

Subject Added Entry-Topical Term  

Concrete.

Subject Added Entry-Topical Term  

Carbon.

Subject Added Entry-Topical Term  

Concrete slabs.

Subject Added Entry-Topical Term  

Concrete floors.

Subject Added Entry-Topical Term  

Insulation.

Subject Added Entry-Topical Term  

Acoustics.

Subject Added Entry-Topical Term  

Geometry.

Subject Added Entry-Topical Term  

Radiation.

Subject Added Entry-Topical Term  

Vibration.

Subject Added Entry-Topical Term  

Prescribed fire.

Subject Added Entry-Topical Term  

Design techniques.

Subject Added Entry-Topical Term  

Design.

Subject Added Entry-Topical Term  

Sustainability.

Added Entry-Corporate Name  

The Pennsylvania State University.

Host Item Entry  

Dissertations Abstracts International. 86-03A.

Electronic Location and Access  

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Control Number  

joongbu:657462