Flexural creep behavior of structural insulated timber panels

10.32920/ryerson.14660949.v1 ◽

2021 ◽

Author(s):

Mohammad Hossein Zarghooni

Keyword(s):

Creep Test ◽

Creep Behavior ◽

Experimental Testing ◽

Test Methods ◽

Load Test ◽

Test Results ◽

Financing Costs ◽

Wood Frame ◽

Term Creep

A Structural Insulated Panel (SIP) is a panel composed of insulation core laminated between two oriented-strand boards (OSB). SIPs deliver building efficiencies by replacing several components of traditional residental and commercial construction, including: (i) studs; (ii) insulation; (iii) vapour barrier; and (iv) air barrier. A SIP-based structure offers superior insulation, exceptional strength, and fast installation. Besides those benefits, the total construction costs are less with SIPs compared to wood-framed homes, expecially when considering speed of construction, less expensive HVAC equipment required, reduced site waste, reduction construction financing costs, more favourable energy-efficient mortages available, and lower cost of owning a home built with SIPS. This thesis presents the experimental testing on selected SIP sizes to investigate their short- and long-term creep behavior under sustained loading. The experiment study performed in a manner to comply with applicable test methods and, Canadian Codes. Short-term creep test results showed the structural adequacy of the tested panels, while the long-term creep test results established the increase in panel total deflection with time. The ultimate load test results showed that the structural qualification of SIPs is "as good as" the structural capacity of the conventional wood-frame buildings.

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Flexural Creep Effects On Permanent Wood Foundation Made Of Structural Insulated Foam-Timber Panels

10.32920/ryerson.14650095.v1 ◽

2021 ◽

Author(s):

Mahmoud Shaaban Sayed Ahmed

Keyword(s):

Experimental Testing ◽

Creep Behaviour ◽

Expanded Polystyrene ◽

Load Test ◽

Soil Pressure ◽

Creep Tests ◽

Structural Capacity ◽

Wood Frame ◽

Term Creep

A Permanent Wood Foundation (PWF) is a panel composed of expanded polystyrene insulation and preserved stud cores laminated between oriented-strand boards and preserved plywood. This thesis presents the experimental testing on selected PWFs' sizes to investigate their long-term creep behaviour under sustained soil pressure. The long-term creep tests were performed over eight months, followed by loading the tested panels to destruction to determine their axial compressive strength. The ultimate load test results showed that the structural qualification of PWF is "as good as" the structural capacity of the conventional wood-frame buildings. The obtained experimental ultimate compressive resistance and flexural resistance, along with the developed long-term creep deflection of the wall under lateral soil pressure can be used in the available Canadian Wood Council (CWC) force-moment interaction equation to establish design tables of such wall panels under gravity loading and soil pressure.

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Flexural Creep Effects On Permanent Wood Foundation Made Of Structural Insulated Foam-Timber Panels

10.32920/ryerson.14650095 ◽

2021 ◽

Author(s):

Mahmoud Shaaban Sayed Ahmed

Keyword(s):

Experimental Testing ◽

Creep Behaviour ◽

Expanded Polystyrene ◽

Load Test ◽

Soil Pressure ◽

Creep Tests ◽

Structural Capacity ◽

Wood Frame ◽

Term Creep

A Permanent Wood Foundation (PWF) is a panel composed of expanded polystyrene insulation and preserved stud cores laminated between oriented-strand boards and preserved plywood. This thesis presents the experimental testing on selected PWFs' sizes to investigate their long-term creep behaviour under sustained soil pressure. The long-term creep tests were performed over eight months, followed by loading the tested panels to destruction to determine their axial compressive strength. The ultimate load test results showed that the structural qualification of PWF is "as good as" the structural capacity of the conventional wood-frame buildings. The obtained experimental ultimate compressive resistance and flexural resistance, along with the developed long-term creep deflection of the wall under lateral soil pressure can be used in the available Canadian Wood Council (CWC) force-moment interaction equation to establish design tables of such wall panels under gravity loading and soil pressure.

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An Experimental Study on the Creep of FRC Sub-Base for Pavement Using a New Testing Device

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.639-640.493 ◽

2013 ◽

Vol 639-640 ◽

pp. 493-497

Author(s):

Woo Tai Jung ◽

Sung Yong Choi ◽

Young Hwan Park

Keyword(s):

Creep Test ◽

Strain Curve ◽

Hydraulic Pressure ◽

Slight Variation ◽

Test Results ◽

Creep Tests ◽

Loading Device ◽

Permanent Load ◽

Term Creep

The hydraulic loading device commonly used for creep test necessitates continuous recharge of the hydraulic pressure with time and is accompanied by slight variation of the permanent load at each recharge. Therefore, accurate test results cannot be obtained for long-term creep tests requiring time-dependent behavioral analysis during more than 6 months. This study conducts creep test as part of the analysis of the long-term characteristics of fiber-reinforced lean concrete sub-base of pavement. The creep test is executed using the new load-amplifier device not a conventional loading device. Since the results of the preliminary verification test on the new creep test device show that constant permanent load is applied without significant variation, it can be expected that more accurate measurement of the creep will be possible in a long-term compared to the conventional hydraulic device. In addition, the creep test results of sub-base specimens reveal the occurrence of large instantaneous elastic strain, differently from the strain curve observed in ordinary concrete, as well as the occurrence of small creep strain leading to low creep coefficient.

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Predicting the Long-term Creep Behavior of Plastics Using the Short-term Creep Test

International Polymer Processing ◽

10.3139/217.1826 ◽

2004 ◽

Vol 19 (3) ◽

pp. 313-319 ◽

Cited By ~ 9

Author(s):

S. D. Lim ◽

J. M. Rhee ◽

C. Nah ◽

S.-H. Lee ◽

M.-Y. Lyu

Keyword(s):

Creep Test ◽

Creep Behavior ◽

Short Term ◽

Term Creep ◽

Short Term Creep

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Creep Resistance of VM12 Steel

Archives of Metallurgy and Materials ◽

10.1515/amm-2016-0265 ◽

2016 ◽

Vol 61 (3) ◽

pp. 1635-1640 ◽

Cited By ~ 3

Author(s):

A. Zieliński ◽

G. Golański ◽

J. Dobrzański ◽

M. Sroka

Keyword(s):

Functional Properties ◽

Creep Test ◽

Creep Resistance ◽

Practical Aspect ◽

Test Results ◽

Creep Tests ◽

Steam Parameters ◽

Term Creep ◽

Long Term Impact

Abstract This article presents selected material characteristics of VM12 steel used for elements of boilers with super- and ultra-critical steam parameters. In particular, abridged and long-term creep tests with and without elongation measurement during testing and investigations of microstructural changes due to long-term impact of temperature and stress were carried out. The practical aspect of the use of creep test results in forecasting the durability of materials operating under creep conditions was presented. The characteristics of steels with regard to creep tests developed in this paper are used in assessment of changes in functional properties of the material of elements operating under creep conditions.

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