A general analytical model for formaldehyde and VOC emission/sorption in single-layer building materials and its application in determining the characteristic parameters

Hexagonal grid cylindrical latticed shell structure is proposed, due to honeycomb structure (although the hexagon structure) is the most effective structure on save the building materials. As a result of the shell structure always with numerous bars, the distribution of internal force and the design of bars often rely on many parameters, likes the span of the structure, the rise-span ratio of the structure, the size of mesh etc., the large scaled finite element software ANSYS parametric design language ANSYS Parametric Design Language (APDL) be used to establish the model of hexagonal grid single-layer cylindrical reticulated shell. The optimization design also was done to found whether the model was a feasibility one. The analysis process shows that the parametric design method provides great convenience for the design of the structure.

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Ignition and flame-growth modelling on realistic building and landscape objects in changing environments

International Journal of Wildland Fire ◽

10.1071/wf07133 ◽

2010 ◽

Vol 19 (2) ◽

pp. 228 ◽

Cited By ~ 2

Author(s):

Mark A. Dietenberger

Keyword(s):

Cone Calorimeter ◽

Building Materials ◽

Oriented Strand Board ◽

Mathematical Formulation ◽

Ornamental Plants ◽

Single Layer ◽

Fire Retardant ◽

Large Area ◽

Changing Environments ◽

Class B

Effective mitigation of external fires on structures can be achieved flexibly, economically, and aesthetically by (1) preventing large-area ignition on structures by avoiding close proximity of burning vegetation; and (2) stopping flame travel from firebrands landing on combustible building objects. Using bench-scale and mid-scale fire tests to obtain flammability properties of common building constructions and landscaping plants, a model is being developed to use fast predictive methods suitable for changing environments imposed on a parcel lot consisting of structures and ornamental plants. Eventually, the property owners and associated professionals will be able to view various fire scenarios with the ability to select building materials and shapes as well as select ornamental plant species and their placement for achieving the desired fire mitigation. The mathematical formulation presented at the 2006 BCC Research Symposium is partially shown here and some results are compared with (1) specialised testing of Class B burning brands (ASTM E108) in the cone calorimeter (ASTM E1354); (2) our refurbished and modified Lateral Ignition and Flame Travel Test (ASTM E1321 and E1317); (3) room-corner tests with oriented-strand board (ISO 9705); and (4) cone calorimeter tests of fire-resistive materials such as fire retardant-treated plywood and single-layer stucco-coated oriented-strand board.

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Analytical model for the moisture absorption in capillary active building materials

Building and Environment ◽

10.1016/j.buildenv.2017.09.018 ◽

2017 ◽

Vol 126 ◽

pp. 98-106 ◽

Cited By ~ 5

Author(s):

Michele Bianchi Janetti ◽

Peter Wagner

Keyword(s):

Analytical Model ◽

Building Materials ◽

Moisture Absorption

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Thermal Modeling of a Multilayer Insulation System

Journal of Heat Transfer ◽

10.1115/1.4001624 ◽

2010 ◽

Vol 132 (9) ◽

Cited By ~ 2

Author(s):

D. K. Kim ◽

E. E. Marotta ◽

L. S. Fletcher

Keyword(s):

Analytical Model ◽

Present Model ◽

Single Layer ◽

Analytical Investigation ◽

Insulation System ◽

Performance Predictions ◽

Improved Performance ◽

And Performance ◽

Multilayer Insulation ◽

Prediction Capability

An analytical investigation of a novel multilayer insulation concept was conducted using an extended analytical model. This model was developed to accommodate a multilayer screen wire insulation system with interstitial shim layers. The goal of this study was to provide a simplified model for evaluating this insulation system, which included either a single or multilayer composite structure in order to predict optimal performance. With the present model, the feasibility and performance characteristics of the insulation concept were predicted. The thermal predictions have demonstrated a very good comparison with previously published experimental data. By adding a radiative resistance to the model, improved performance predictions of overall thermal resistance/conductance were possible, leading to the extension of single layer analytical model to multiple-layered cases. From the parametric study, the key thermophysical property of the screen wire was found to be the wire’s thermal conductivity. The present model provided excellent performance prediction capability for other screen wire materials, and these results were also validated with a comparison to previously published experimental results.

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