scholarly journals Development of an Innovative Modular Foam-Filled Panelised System for Rapidly Assembled Post Disaster Housing

2018 ◽  
Author(s):  
Pezhman Sharafi ◽  
Saeed Nemati ◽  
Bijan Samali ◽  
Maryam Ghodrat
Keyword(s):  
Sandwich Panel ◽  
High Density ◽  
Structural Performance ◽  
Modular Construction ◽  
Structural Walls ◽  
Permanent Housing ◽  
Pu Foam ◽  
Load Carrying ◽  
Foam Filled ◽  
Post Disaster

In this paper the development process of a deployable modular sandwich panelized system for rapid assembly building construction is presented, and its structural performance under some different action effects is investigated. This system, which includes an innovative sandwich panel and its integrated connections, can be used as structural walls and floors in quickly assembled post-disaster housing, as well as load bearing panels for pre-fabricated modular construction and semi-permanent buildings. Panels and connections are composed of a pneumatic fabric formwork, and two 3-D high-density polyethylene (HDPE) sheets as the skins, filled with high-density rigid Polyurethane (PU) foam as the core. HDPE sheets manufactured with a studded surface considerably enhance the stress distribution, buckling performance and delamination strength of the sandwich panel under various loading conditions. The load-carrying behaviour of the system in accordance with some ASTM standards is presented here. The results show the system satisfies the codes criteria regarding semi-permanent housing.

scholarly journals Development of an Innovative Modular Foam-Filled Panelized System for Rapidly Assembled Postdisaster Housing

Buildings ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 97 ◽  
Author(s):  
P. Sharafi ◽  
S. Nemati ◽  
B. Samali ◽  
M. Ghodrat
Keyword(s):  
Sandwich Panel ◽  
High Density ◽  
Building Construction ◽  
Structural Performance ◽  
Modular Construction ◽  
Structural Walls ◽  
Pu Foam ◽  
Load Carrying ◽  
Foam Filled ◽  
American Society

In this paper, the development process of a deployable modular sandwich panelized system for rapid-assembly building construction is presented, and its structural performance under some different action effects is investigated. This system, which includes an innovative sandwich panel and its integrated connections, can be used as structural walls and floors in quickly-assembled postdisaster housing, as well as load-bearing panels for prefabricated modular construction and semipermanent buildings. Panels and connections are composed of a pneumatic fabric formwork, and two 3D high-density polyethylene (HDPE) sheets as the skins, filled with high-density rigid polyurethane (PU) foam as the core. HDPE sheets manufactured with a studded surface considerably enhance stress distribution, buckling performance, and delamination strength of the sandwich panel under various loading conditions. The load-carrying behavior of the system in accordance with some American Society for Testing and Materials (ASTM) standards is presented here. The results show the system satisfies the codes’ criteria regarding semipermanent housing.

scholarly journals Structural Performance of Polyurethane Foam-Filled Building Composite Panels: A State-Of-The-Art

2019 ◽  
Vol 3 (2) ◽  
pp. 40 ◽  
Author(s):  
Bijan Samali ◽  
Saeed Nemati ◽  
Pezhman Sharafi ◽  
Farzaneh Tahmoorian ◽  
Farshad Sanati
Keyword(s):  
Building Construction ◽  
Shear Behaviour ◽  
Structural Performance ◽  
Tensile Behaviour ◽  
Composite Panels ◽  
Structural Members ◽  
The Past ◽  
Pu Foam ◽  
Foam Filled ◽  
Filled Composite

Composite panels with polyurethane (PU) foam-core and facing materials, such as gypsum, engineered wood or some composite materials, are being used as structural members in building construction. This paper reviews and summarises major research developments, and provides an updated review of references on the structural performance of foam-filled building composite panels from 1998 to 2017. The review revealed that previous studies on the structural performance of foam-filled building composite panels could be categorised into five themes; namely, energy absorption and dynamic behaviour; bending and shear behaviour, edgewise and flatwise compressive/tensile behaviour; delamination/deboning issues; and finally some miscellaneous issues. These categories comprise approximately 30%, 40%, 11%, 11% and 8% of related studies over the last two decades, respectively. Also, over the past five years, the number of relevant studies has increased by ~400% relative to the previous similar periods, indicating the attention and focus of researchers to the importance of the structural performance of foam-filled composite panels.

scholarly journals Structural Performance and Reinforcement Improvement of Structural Walls Using Strain-Hardening Cementitious Composites

2021 ◽  
Vol 13 (7) ◽  
pp. 3607
Author(s):  
Hyeong-Ki Kim ◽  
Chang-Geun Cho ◽  
Sun-Ju Lee ◽  
Young Hak Lee ◽  
Taehoon Kim
Keyword(s):  
Strain Hardening ◽  
Shear Walls ◽  
Mechanical Tests ◽  
Structural Performance ◽  
Cementitious Composites ◽  
Structural Walls ◽  
Damage And Failure ◽  
Load Carrying ◽  
Loading Tests ◽  
Rc Shear Wall

Reinforced concrete (RC) shear walls are effective in improving lateral stiffness and load-carrying capacity under earthquake and wind loads. According to the level of seismic design, however, the spacing of reinforcing steel bars should be very narrow and complicated, with tight spacing of tied bars, as is the case with seismically special RC shear wall design. The purpose of this study was to investigate the applicability of strain-hardening cementitious composites (SHCCs) in structural walls in order to improve structural performance as well as the complications with reinforcement details. The SHCC was mixed, and mechanical tests showed that the SHCC exhibited high ductile tensile strains above 2.0%, while sustaining the tensile stress after cracks and developing multiple microcracks, avoiding crack localizations. Six specimens of RC and reinforced SHCC structural walls were designed and manufactured with varying reinforcement details, and experiments on wall specimens were carried out under transverse wall-loading tests. These experiments demonstrated that the use of SHCC in structural walls, despite minimum use of reinforcement ratios, showed improved responses to minimize damage and failure caused by localized cracks under bending and shear to compared with the use of normal reinforcement ratios in RC walls.

scholarly journals Flexural and shear performance of an innovative foam-filled sandwich panel with 3-D high density polyethylene skins

2018 ◽  
pp. 113-128 ◽  
Author(s):  
P. Sharafi ◽  
S. Nemati ◽  
B. Samali ◽  
A. Bahmani ◽  
S. Khakpour ◽  
...  
Keyword(s):  
High Density Polyethylene ◽  
Sandwich Panel ◽  
High Density ◽  
Shear Performance ◽  
Foam Filled

scholarly journals Structural Performance Assessment of Innovative Hollow Cellular Panels for Modular Flooring System

Buildings ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 57
Author(s):  
Keerthana John ◽  
Sherin Rahman ◽  
Bidur Kafle ◽  
Matthias Weiss ◽  
Klaus Hansen ◽  
...  
Keyword(s):  
Emergency Preparedness ◽  
Failure Modes ◽  
Ease Of Use ◽  
Structural Performance ◽  
Modular Construction ◽  
Steel Sheets ◽  
Strain Behaviour ◽  
Load Carrying ◽  
Floor Systems ◽  
Modular Housing

Lightweight modular construction has become an increasing need to meet the housing requirements around the world today. The benefits of modular construction ranging from rapid production, consistency in quality, sustainability, and ease of use have widened the scope for the construction of residential, commercial, and even emergency preparedness facilities. This study introduces novel floor panels that can be flat-packed and built into modular housing components on-site with minimal labour and assistance. The flooring system uses hollow cellular panels made of various configurations of trapezoidal steel sheets. The structural performance of three different configurations of these hollow flooring systems as a modular component is presented in this study by analysing the failure modes, load-displacement parameters, and strain behaviour. The study confirms significant advantages of the proposed hollow floor systems, with multi-cells reporting higher load-carrying capacity. The hollow flooring system performed well in terms of structural performance and ease in fabrication as opposed to the conventional formworks and commercial temporary flooring systems. The proposed flooring system promises efficient application as working platforms or formworks in temporary infrastructural facilities and emergency construction activities.

scholarly journals Time-Efficient Post-Disaster Housing Reconstruction with Prefabricated Modular Structures

2014 ◽  
Vol 39 (3) ◽  
pp. 59-69 ◽  
Author(s):  
Tharaka Gunawardena ◽  
Tuan Ngo ◽  
Priyan Mendis ◽  
Lu Aye ◽  
Robert Crawford
Keyword(s):  
Best Practice ◽  
Efficient Solution ◽  
Modular Construction ◽  
International Organisations ◽  
Reconstruction Process ◽  
Permanent Housing ◽  
The World ◽  
Housing Reconstruction ◽  
Modular Structures ◽  
Post Disaster

With many natural disasters such as earthquakes, cyclones, bushfires and tsunamis destroying human habitats around the world, post-disaster housing reconstruction has become a critical topic. The current practice of post-disaster reconstruction consists of various approaches that carry affected homeowners from temporary shelters to permanent housing. While temporary shelters may be provided within a matter of days as immediate disaster relief, permanent housing can take years to complete. However, time is critical, as affected communities will need to restore their livelihoods as soon as possible. Prefabricated modular construction has the potential to drastically improve the time taken to provide permanent housing. Due to this time-efficiency, which is an inherent characteristic of modular construction, it can be a desirable strategy for post-disaster housing reconstruction. This paper discusses how prefabricated modular structures can provide a more time-efficient solution by analysing several present-day examples taken from published post-disaster housing reconstruction processes that have been carried out in different parts of the world. It also evaluates how other features of modular construction, such as ease of decommissioning and reusability, can add value to post-disaster reconstruction processes and organisations that contribute to the planning, design and construction stages of the reconstruction process. The suitability of modular construction will also be discussed in the context of the guidelines and best practice guides for post-disaster housing reconstruction published by international organisations. Through this analysis and discussion, it is concluded that prefabricated modular structures are a highly desirable time-efficient solution to post-disaster housing reconstruction.

Crush Response of Polyurethane Foam-Filled Aluminium Tube Subjected to Axial Loading

2014 ◽  
Vol 875-877 ◽  
pp. 534-541 ◽  
Author(s):  
Chawalit Thinvongpituk ◽  
Nirut Onsalung
Keyword(s):  
Energy Absorption ◽  
Polyurethane Foam ◽  
Testing Machine ◽  
Axial Loading ◽  
Asymmetric Mode ◽  
Pu Foam ◽  
Universal Testing ◽  
Collapse Mode ◽  
Empty Tube ◽  
Foam Filled

In this paper, the experimental investigation of polyurethane (PU) foam-filled into circular aluminum tubes subjected to axial crushing was presented. The purpose of this study is to improve the energy absorption of aluminium tube under axial quasi-static load. The aluminium tube was made from the AA6063-T5 aluminium alloy tubes. Each tube was filled with polyurethane foam. The density of foam was varied from 100, 150 and 200 kg/mP3P including with empty tube. The range of diameter/thickness (D/t) ratio of tube was varied from 15-55. The specimen were tested by quasi-static axial load with crush speed of 50 mm/min using the 2,000 kN universal testing machine. The load-displacement curves while testing were recorded for calculation. The mode of collapse of each specimen was analyzed concerning on foam density and the influence of D/t ratio. The results revealed that the tube with foam-filled provided significantly increment of the energy absorption than that of the empty tube. While the density of foam and D/t ratios increase, the tendency of collapse mode is transformed from asymmetric mode to concertina mode.

Mechanical performance of polyester pin-reinforced foam filled honeycomb sandwich panels

2018 ◽  
Vol 25 (4) ◽  
pp. 797-805 ◽  
Author(s):  
R.S. Jayaram ◽  
V.A. Nagarajan ◽  
K.P. Vinod Kumar
Keyword(s):  
Mechanical Properties ◽  
Mechanical Performance ◽  
Flexural Rigidity ◽  
Sandwich Panels ◽  
Interfacial Strength ◽  
Structural Performance ◽  
Experimental Investigations ◽  
Honeycomb Sandwich ◽  
Foam Filled ◽  
Pin Reinforcement

Abstract Honeycomb sandwich panels entice continuously enhanced attention due to its excellent mechanical properties and multi-functional applications. However, the principal problem of sandwich panels is failure by face/core debond. Novel lightweight sandwich panels with hybrid core made of honeycomb, foam and through-thickness pin was developed. Reinforcing polyester pins between faces and core is an effectual way to strengthen the core and enhance the interfacial strength between the face/core to improve the structural performance of sandwich panels. To provide feasibility for pin reinforcement, honeycomb core was pre-filled with foam. Mechanical properties enhancement due to polyester pinning were investigated experimentally under flatwise compression, edgewise compression and flexural test. The experimental investigations were carried out for both “foam filled honeycomb sandwich panels” (FHS) and “polyester pin-reinforced foam filled honeycomb sandwich panels” (PFHS). The results show that polyester pin reinforcement in foam filled honeycomb sandwich panel enhanced the flatwise, edgewise compression and flexural properties considerably. Moreover, increasing the pin diameter has a larger effect on the flexural rigidity of PFHS panels. PFHS panels have inconsequential increase in weight but appreciably improved their structural performance.

Bending and free vibration analysis of foam-filled truss core sandwich panel

2016 ◽  
Vol 20 (5) ◽  
pp. 617-638 ◽  
Author(s):  
MP Arunkumar ◽  
Jeyaraj Pitchaimani ◽  
KV Gangadharan
Keyword(s):  
Free Vibration ◽  
Vibration Analysis ◽  
Sandwich Panel ◽  
Closed Form Solution ◽  
Free Vibration Analysis ◽  
Element Model ◽  
Form Solution ◽  
Numerical Comparison ◽  
Truss Core ◽  
Foam Filled

This paper presents the studies carried out on bending and free vibration behavior of truss core sandwich panel filled with foam typically used in aerospace applications. Equivalent stiffness properties for foam-filled truss core sandwich panel are derived by idealizing 3D foam-filled sandwich panel to an equivalent 2D orthotropic thick plate continuum. The accuracy of the derived elastic property is ensured by the numerical comparison of free vibration response of 3D and its equivalent 2D finite element model. The derived stiffness constants were used in closed form solution to evaluate the maximum deflection of the continuum. The results show that the free vibration and static behavior of the sandwich panel can be enhanced in due consideration to the space constraint by filling foam in the empty space of core. The results also reveal that triangular core foam-filled sandwich panel deflects less compared to other cores. From the free vibration analysis, effect of filling foam is effective in cellular and trapezoidal core.

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