Song, Jin Young
(Department of Architecture, University at Buffalo, The State University of New York)
,
Lee, Donghun
(Leslie E. Robertson Associates)
,
Erikson, James
(Arizona State University)
,
Hao, Jianming
(Department of Civil, Structural and Environmental Engineering, University at Buffalo, The State University of New York)
,
Wu, Teng
(Department of Civil, Structural and Environmental Engineering, University at Buffalo, The State University of New York)
,
Kim, Bonghwan
(Skidmore, Owings & Merrill LLP)
This paper explores the function of a structural skin with an embossed surface applicable to use for tall building structures. The major diagrid system with a secondary embossed surface structure provides an enhanced perimeter structural system by increasing tube section areas and reduces aerodynami...
This paper explores the function of a structural skin with an embossed surface applicable to use for tall building structures. The major diagrid system with a secondary embossed surface structure provides an enhanced perimeter structural system by increasing tube section areas and reduces aerodynamic loads by disorienting major organized structure of winds. A parametric study used to investigate an optimized configuration of the embossed structure revealed that the embossed structure has a structural advantage in stiffening the structure, reducing lateral drift to 90% compared to a non-embossed diagrid baseline model, and results of wind load analysis using computational fluid dynamics, demonstrated the proposed embossed system can reduce. The resulting undulating embossed skin geometry presents both opportunities for incorporating versatile interior environments as well as unique challenges for daylighting and thermal control of the envelope. Solar and thermal control requires multiple daylighting solutions to address each local façade surface condition in order to reduce energy loads and meet occupant comfort standards. These findings illustrate that although more complex in geometry, architects and engineers can produce tall buildings that have less impact on our environment by utilizing structural forms that reduce structural steel needed for stiffening, thus reducing embodied $CO^2$, while positively affecting indoor quality and energy performance, all possible while creating a unique urban iconography derived from the performance of building skin.
This paper explores the function of a structural skin with an embossed surface applicable to use for tall building structures. The major diagrid system with a secondary embossed surface structure provides an enhanced perimeter structural system by increasing tube section areas and reduces aerodynamic loads by disorienting major organized structure of winds. A parametric study used to investigate an optimized configuration of the embossed structure revealed that the embossed structure has a structural advantage in stiffening the structure, reducing lateral drift to 90% compared to a non-embossed diagrid baseline model, and results of wind load analysis using computational fluid dynamics, demonstrated the proposed embossed system can reduce. The resulting undulating embossed skin geometry presents both opportunities for incorporating versatile interior environments as well as unique challenges for daylighting and thermal control of the envelope. Solar and thermal control requires multiple daylighting solutions to address each local façade surface condition in order to reduce energy loads and meet occupant comfort standards. These findings illustrate that although more complex in geometry, architects and engineers can produce tall buildings that have less impact on our environment by utilizing structural forms that reduce structural steel needed for stiffening, thus reducing embodied $CO^2$, while positively affecting indoor quality and energy performance, all possible while creating a unique urban iconography derived from the performance of building skin.
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가설 설정
(b) has more GFA than (a) due to the embossed skin. (c) Normalized cumulative story drift with respect to the maximum story drift. (d) Normalized inter-story drift with respect to the maximum inter-story drift.
(c) Normalized cumulative story drift with respect to the maximum story drift. (d) Normalized inter-story drift with respect to the maximum inter-story drift.
제안 방법
3 and 4 was conducted using a 2D model with a specified column span within a bay, allowing for the result to be adapted in 3D models with various column spans in a variety of bay widths.
Also, it creates versatile office environments, and presents a unique urban iconography derived from performance of the building skin. However, the conclusions on the effect of enhanced stiffness of the embossed skins were derived from a case study in a model with limited configurations in small number of design parameters. This study needs to be continued further to accommodate various types of design parameters by developing a mathematical model capable of analyzing general types of emboss configurations.
, 1997). In this study, both the full-scale simulation of the embossed tower and baseline models were simulated using commercial CFD software for comparison. The CFD computational domain covers 30×D, where D is the width of the building base, in the stream-wise direction, 15×D in the lateral direction, and 2×H, where H is the height of the building, in the vertical direction.
The Baseline tower was designed using moment frame system consisting of a braced core, moment resisting frame in perimeter and horizontal members connecting the core frame to the perimeter in moment connection. The Emboss tower was modelled using a core frame without bracing, the diagrid and emboss skin around the perimeter and horizontal members connecting the core frame to the perimeter in shear connection. For both models, all nodes in each story were constrained using a rigid diaphragm.
However, the conclusions on the effect of enhanced stiffness of the embossed skins were derived from a case study in a model with limited configurations in small number of design parameters. This study needs to be continued further to accommodate various types of design parameters by developing a mathematical model capable of analyzing general types of emboss configurations.
대상 데이터
For both models, all nodes in each story were constrained using a rigid diaphragm. All structural members were modelled with steel material.
참고문헌 (16)
American Society of Civil Engineers (ASCE), (2010). Minimum Design Loads for Buildings and Other Structures, ASCE 7-10. Reston, VA.
American National Standards Institute, Refrigerating and Air-Conditioning Engineers American Society of Heating, and Illuminating Engineering Society of North America (2013). ANSI/ASHRAE/IES Standard 90.1-2010, Energy Standard for Buildings except Low-Rise Residential Buildings. Atlanta, GA: American Society of Heating, Refrigerating and Air-Conditioning Engineers, 2013.
Blocken, B., (2014). 50 years of computational wind engineering: past, present and future. Journal of Wind Engineering and Industrial Aerodynamics, 129: p. 69-102.
Computers and Structures, SAP2000: Static and Dynamic Finite element Analysis of Structures (Version 17.2.0). Berkeley, CA
U.S. Department of Energy (2017a). Commercial Prototype Building Models. [Online] Available: https://www.energycodes.gov/development/commercial/prototype_models
U.S. Department of Energy (2017b). Weather Data [Online] Available: https://energyplus.net/weather
EnergyPlus v8.6. (2017). Department of Energy.
Moon, K., Conner, J., and Fernandez, J. (2007). Diagrid structural systems for tall buildings: Characteristics and methodology for preliminary design. Struct. Design Tall Spec. Build. 16, 205-230.
Murakami, S. and Mochida, A. (1999). Past, present and future of CWE: the view from 1999. In: Wind Engineering into the 21st Century, p. 91-104.
Neary, J. (2016). Structural Skin. Proceedings of Facade Tectonics 2016 World Congress, Los Angeles, CA, October 10-11.
Picon, A. (2014). Ornament: The politics of architecture and subjectivity. John Wiley & Sons, p. 129.
Rahimian, A. and Yoram, E. (2006). New York's Hearst Tower. Structure, 25.
Tamura, T., Kawai, H., Kawamoto, S., Nozawa, K., Sakamoto, S., and Ohkuma, T. (1997). Numerical prediction of wind loading on buildings and structures - Activities of AIJ cooperative project on CFD. Journal of Wind Engineering and Industrial Aerodynamics, 67, 671-685.
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