External wall-bounded flows

Full-scale tests on a one-story steel frame structure with a typical precast cladding system using ambient and free vibration methods are described in detail. The cladding system is primarily composed of ALC (Autoclaved Lightweight Concrete) external wall cladding panels, gypsum plasterboard interior linings, and window glazing systems. Ten test cases including the bare steel frame and the steel frame with addition of different parts of the precast cladding system are prepared for detailed investigations. The amplitude-dependent dynamic characteristics of the test cases including natural frequencies and damping ratios determined from the tests are presented. The effects of the ALC external wall cladding panels, the gypsum plasterboard interior linings, and the window glazing systems on the stiffness and structural damping of the steel frame are discussed in detail. The effect of the precast cladding systems on the amplitude dependency of the dynamic characteristics and the tendencies of the dynamic parameters with respect to the structural response amplitude are investigated over a wide range. Furthermore, results estimated from the ambient vibration method are compared with those from the free vibration tests to evaluate the feasibility of the ambient vibration method.

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Velocity probability distribution scaling in wall-bounded flows at high Reynolds numbers

Physical Review Fluids ◽

10.1103/physrevfluids.4.034101 ◽

2019 ◽

Vol 4 (3) ◽

Cited By ~ 1

Author(s):

M.-W. Ge ◽

Xiang I. A. Yang ◽

Ivan Marusic

Keyword(s):

Probability Distribution ◽

Reynolds Numbers ◽

High Reynolds Numbers ◽

Velocity Probability ◽

Wall Bounded Flows ◽

High Reynolds

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Mechanism of fire spread on facades and the new Technical Report of EOTA “Large-scale fire performance testing of external wall cladding systems”

MATEC Web of Conferences ◽

10.1051/matecconf/20130902010 ◽

2013 ◽

Vol 9 ◽

pp. 02010 ◽

Cited By ~ 7

Author(s):

Ingolf Kotthoff ◽

Jan Riemesch-Speer

Keyword(s):

Large Scale ◽

Performance Testing ◽

Fire Spread ◽

Fire Performance ◽

External Wall ◽

Technical Report

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Formation Design of Sandwich External Wall Panel in Cold Climate Area Made of Paper Honeycomb Board

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.174-177.1533 ◽

2012 ◽

Vol 174-177 ◽

pp. 1533-1536

Author(s):

Hai Rong Yang ◽

Yan Yuan

Keyword(s):

Internal Surface ◽

Cold Climate ◽

Transmission Factor ◽

Thermal Calculation ◽

Wall Panel ◽

Insulating Layer ◽

External Wall ◽

Thermal Insulating ◽

Paper Honeycomb ◽

Formation Design

The sandwich external wall panel is made of fireproof Paper Honeycomb Board (PHB) as kernel material, and the external surface is covered by colorful extruded steel board, while the internal surface is coated with the thermal insulating frothing ceramic board or the calcium silicate board, which works as the insulating layer or protecting layer of the panel. Two types of formation design are suggested, i.e., Type-A and Type-B. After corresponding thermal calculation, the maximum thermal transmission factor is determined as 0.424W/(m2• K), which complies with the threshold stipulated in the National Code for external wall panel used in cold climate area. The newly designed wall panel will save 65% of energy when compared with the traditional one made in 1980.

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Research on Detail-Structure Construction Technology of Outside Heat Preservation of Exterior Walls

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.548-549.1790 ◽

2014 ◽

Vol 548-549 ◽

pp. 1790-1794

Author(s):

Xia Zhao ◽

You Ping Ding ◽

Xiu Yan Zhang

Keyword(s):

Construction Technology ◽

Air Conditioner ◽

Construction Process ◽

External Wall ◽

Similar Construction ◽

Preservation Technology ◽

Structure Treatment ◽

Heat Preservation

In order to analyze the effect of heat preservation, the heat preservation technology of detail structure, such as decorative lines of external walls, edge beam and edge column, windows, balcony and laying position of air conditioner, have been well treated under the system of thin plastered external wall based on EPS. Moreover, the technical-economy benefits of detail structure treatments have been analyzed by comparing with those without detail structure treatment. The results show that better heat preservation and economy benefits would be created by detail structure treatment, which could provide good reference for similar construction process.

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