دانلود رایگان مقاله لاتین توزیع تنش سطحی درbfrp از سایت الزویر
عنوان فارسی مقاله:
بررسی تجربی توزیع تنش سطحی پیوند داده شده در BFRP با استفاده از سنسور فیبر نوری (FOS)
عنوان انگلیسی مقاله:
Experimental Study of Interfacial Stress Distribution of Bonded-in BFRP Rod Glulam Joints Using Fibre Optic Sensors (FOS)
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
An innovative technique to create moment connections using rods, such as, steel and fibre reinforced polymers (FRPs), loaded into structural timber elements is preferred over the mechanical connections. Some of the advantages achieved through bonded-in rod techniques include transfer of high localised forces, formation of stiff connections and good fire resistance properties, since the host timber acts as insulating material to the connections [1,2]. Other advantages are that, dissimilar materials can be bonded and shear stresses are uniformly transferred between materials [3]. Moreover, adhesive joint requires little or no damage to the adherends and is capable of resisting fatigue compared to the other jointing techniques [4]. Bonded-in rods have been successfully used for almost 30 years for repair and strengthening of timber structures [1,5]. Connections with bonded-in rods are of a hybrid type, comprising timber, adhesive and rod. Timber used for connections with bonded-in rod joints is softwood, hardwood or a composite product such as glued laminated timber (glulam), parallel strand lumber (PSL) and laminated veneer lumber (LVL). In practice, glulam members made from softwood are most commonly used as the host material, due to their superior strength and stiffness compared to the sawn timber. In most cases, steel rods (threaded and reinforced types) have been used as the medium through which load is transferred because of their availability coupled with well-established surface preparations [6]. In the past two decades, fibre reinforced polymers (FRPs) are being considered as an alternative connecting rod for applications in timber structures. Adhesives commonly used in practice for bonded-in rod connections are one-and two-component epoxies, polyurethane and resorcinol types [5]. 1.1. Aims and objectives The performance of bonded-in rod connections is governed, mainly, by stresses at the interface, which are in turn controlled by many factors. However, investigation of the stresses at the interfaces of the bonded-in rod connections is limited, mainly, owing to difficulty in measuring interfacial stresses. Research into the use of GFRP and CFRP materials as reinforcement in timber is much more frequently published, compared to BFRPs. Moreover, the use of fibre optic sensors for investigating the stress/strain behaviour in timber connections has not yet been reported. The current research investigated the distribution of interfacial stresses using fibre optic sensors (FOS) in order to understand the mechanisms governing the behaviour of the joint for structural analysis and design purposes. Pull-out tests of bonded-in BFRP rods loaded parallel and perpendicular to the grain were used in this study. The effect of bonded length and load-to-grain on interfacial stress distribution was also discussed and analysed.
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کلمات کلیدی:
Fibre-reinforced Polymer Reinforcement for Concrete Structures: ... https://books.google.com/books?isbn=9812704868 Kiang-Hwee Tan - 2003 - Fiber-reinforced concrete Proceedings of the Sixth International Symposium on FRP Reinforcement for ... bars as NSM reinforcement is controlled primarily by the bond characteristics of the ... FRP sheets are capable of predicting the interfacial shear stress distribution, ... Advances in FRP Composites in Civil Engineering: Proceedings of the ... https://books.google.com/books?isbn=3642174876 Lieping Ye, Peng Feng, Qingrui Yue - 2012 - Technology & Engineering Interfacial. Bond. Stress. of. Bonding. Anchors. for. FRP. Tendon. Qilin Zhao, Fei ... the factors affecting the distribution of interfacial bonding stress are discussed, ... FRP Composites in Civil Engineering - CICE 2004: Proceedings of the ... https://books.google.com/books?isbn=1135290520 R. Seracino - 2006 - Technology & Engineering Proceedings of the 2nd International Conference on FRP Composites in Civil ... (2001) σxy(2) (b) Interfacial shear stress Figure 5. ... stress distribution in the adhesive layer and the stress-free boundary condition ... Parametric study of beams with externally bonded FRP reinforcement,ACI Structural Journal 94(5): 493–501. [PDF]Interfacial stress analysis of adhesively bonded joints - ePublications ... epubs.scu.edu.au/cgi/viewcontent.cgi?article=1064&context=acmsm23 by SA Hadigheh - 2014 - Related articles ABSTRACT. To attain a suitable strengthening system for concrete structures, adequate stress distribution between externally bonded fibre reinforced polymer ... Interfacial stress distribution of externally strengthened with plated FRP https://prezi.com/.../interfacial-stress-distribution-of-externally-strengthened-with-plat... Nov 16, 2014 - Interfacial stress distribution of externally strengthened with plated FRP Interfacial stresses in plated beams. Bond behaviour between plated ...
