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عنوان فارسی مقاله:
رفتار های پی وی سی تقویت شده روکش دیوارهای بتنی تحت بارگذاری محوری خارج از مرکز
عنوان انگلیسی مقاله:
Behaviour of PVC encased reinforced concrete walls under eccentric axial loading
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Recently, polyvinyl chloride (PVC) has been used as a stay-in-place (SIP) formwork because of its lower cost compared to other materials (such as fiber-reinforced polymers), durability, and ease to assemble. This type of formwork has been used mainly for walls in commercial, agricultural and industrial buildings. The PVC stay in place (SIP) formwork is mainly designed to be highly durable in harsh environmental conditions and to enhance the constructability and the mechanical performance of concrete. The PVC SIP formwork consists of interconnected panels and connectors that serve as permanent formwork for the concrete walls. The panels form the outer shell of the PVC encased wall surface. The connectors slide and interlock with the panels. Panels are connected together via hollow web connectors that hold the form together as shown in Fig. 1. The hollow web connectors allow the concrete to flow laterally between adjacent cells. In addition, it facilitates the placement of reinforcing steel [6]. This system has been commonly used in casting tanks and swimming pools. The PVC encasement system may provide additional tension reinforcement and increase the confinement of the concrete, and hence increase the flexural and axial capacity of the concrete walls. When subjected to flexural load, the increase in the peak load and the ductile response depended on the wall thickness and the reinforcement ratios [3,8,11,12,13]. Under axial load, the effect of the PVC confinement on increasing the ultimate capacity depended on the configuration of the panels and the connectors [5,7,8]. For the plain concrete walls encased with PVC and tested under combined axial and flexure load, the results showed a considerable contribution of the polymer to the tensile load capacity of the specimens [4]. The PVC encased system has been used extensively to form foundation walls, retaining walls, walls in water and waste treatment tanks and walls for swimming pools. In these applications, the walls are resisting axial loads and bending moments. The main objective of this study is to investigate the characteristic behavior of the PVC encased walls with different reinforcement ratios subjected to axial compression and flexural. The behaviour of the PVC encased specimens is compared to the control specimens to assess the contribution of the PVC under different eccentricities and different reinforcement ratios which has not been addressed by existing codes. Then, a theoretical prediction is derived taking into consideration the effect of the PVC on the load carrying capacity of the walls.
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کلمات کلیدی:
Mechanical behaviour of a plasticized PVC subjected to ethanol ... www.sciencedirect.com/science/article/pii/S0141391005000406 by Q Yu - 2005 - Cited by 17 - Related articles This paper presents the results of a series of experimental investigations conducted to assess the influence of ethanol exposure at different concentrations on the mechanical properties of a plasticized PVC membrane. ... The experiments also indicate a slower rate of plasticizer ... Experimental and numerical study on the behaviour of PVC and HDPE ... www.sciencedirect.com/science/article/pii/S0167663612001123 by AS Ognedal - 2012 - Cited by 17 - Related articles Jun 18, 2012 - This paper presents and discusses a set of biaxial tests on two different polymer materials; PVC and HDPE. The biaxial tests are used to ... The mechanical behaviour of PVC short-fibre composites | SpringerLink link.springer.com/article/10.1007/BF00559325 by J Yuan - 1985 - Cited by 19 - Related articles The previously proposed general yield criterion for PVC and its short-fibre composites is also examined. No significant effect due to improved fibre-matrix ... [PDF]The Behaviour of PVC in Landfill - European Commission ec.europa.eu/environment/waste/studies/pvc/landfill.pdf behaviour of PVC in landfills, or under landfill and soil-buried conditions. Particularly addressed are the questions whether there is a possible degradation of the ... [PDF]The Behaviour of PVC in Landfill - Annexes - European Commission ec.europa.eu/environment/waste/studies/pvc/landfill_annexes.pdf short term and long term behaviour of rigid and flexible PVC in landfills shall be ... The aerobic and anaerobic degradation of both PVC and the additives to PVC ... PVC's Physical Properties - PVC www.pvc.org/en/p/pvcs-physical-properties Sep 21, 2015 - On the other hand, the viscoelastic behaviour of molten PVC is less dependent on temperature and is stable. Therefore PVC is suitable for ... [PDF]Behaviour of PVC Encased Reinforced Concrete Walls under ... https://uwspace.uwaterloo.ca/bitstream/handle/10012/8192/Abdel_Havez_Amr.pdf;... by A Abdel Havez - 2014 - Cited by 3 - Related articles Behaviour of PVC Encased Reinforced Concrete. Walls under Eccentric Axial Loading by. Amr Abdel Havez. A thesis presented to the University of Waterloo. Anomalous behaviour of PVC–CPVC–CPE blends: Plastics, Rubber ... www.tandfonline.com/doi/abs/10.1179/174328905X66162 by K Marossy - 2005 - Cited by 5 - Related articles Jul 19, 2013 - Chlorinated PVC (CPVC) is widely used for high temperature applications, e.g. hot water pipes. To improve processing, it is usually mixed with ...
