Rational Model for Multibolted Connections for GFRP Members

Hassan, Nahla K.; Mohamedien, Mohamed A.; Rizkalla, Sami

doi:10.1061/(asce)1090-0268(1997)1:2(71)

Cited by 16 publications

(6 citation statements)

References 2 publications

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“…Failure of the FRP laminate may accrue from net-tension, cleavage-tension, bearing, and shear-out mechanisms (Camanho and Matthews, 1997;Hassan et al, 1997aHassan et al, , 1997b, where bearing is the most desirable failure mode since the connection reaches its strength while allowing significant deformations (Lamanna, 2002;Rizzo, 2005), whereas the other failure modes develop in a more brittle fashion (Rosner and Rizkalla, 1995). Pry-out or spalling of the concrete may also lead to failure of an MF-FRP strengthening system, typically accruing from the interaction of the stress fields produced in the concrete around closely spaced fasteners (Lamanna, 2002;Rizzo, 2005).…”

Section: Mf-frp Strengthening Layout and Test Matrixmentioning

confidence: 99%

Modelling and verification of response of RC slabs strengthened in flexure with mechanically fastened FRP laminates

Napoli¹,

Matta²,

Martinelli³

et al. 2010

Magazine of Concrete Research

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Mechanically fastened fibre-reinforced polymer laminate systems are emerging as a promising means for the repair and strengthening of reinforced concrete members. This technology entails the use of pultruded carbon-and glassvinyl ester fibre-reinforced polymer laminates with enhanced longitudinal bearing strength that are connected to the concrete substrate by means of steel anchors. Attractive applications are those for emergency repairs where constructability and speed of installation are critical requirements. In this paper, an experimental investigation is first presented that included laboratory testing of scaled reinforced concrete slabs strengthened with four different combinations of laminate lengths and fastener layouts to study optimised strengthening configurations. Compelling evidence was gained on the influence of the partial interaction between reinforced concrete slabs and mechanically fastened fibre-reinforced polymer laminates on the flexural response arising predominantly from bearing of the fasteners on to the fibre-reinforced polymer laminate. A numerical study is presented where the proposed finiteelement procedure incorporates non-linear constitutive models for materials and the concrete-fibre-reinforced polymer interface. For the latter, an accurate and simplified, conservative bilinear stress-slip model is successfully implemented and verified to evaluate applicability for analysis and design purposes.

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Section: Mf-frp Strengthening Layout and Test Matrixmentioning

confidence: 99%

Modelling and verification of response of RC slabs strengthened in flexure with mechanically fastened FRP laminates

Napoli¹,

Matta²,

Martinelli³

et al. 2010

Magazine of Concrete Research

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show abstract

“…This means that the second row of bolts carry much less load than the first. As a follow-up study, Hassan et al [23] proposed a rational model to predict the design resistance of multi-bolted lap connections and the respective failure mode.…”

Section: Multi-bolted Connectionsmentioning

confidence: 99%

A review of the behaviour and analysis of bolted connections and joints in pultruded fibre reinforced polymers

2015

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This paper presents a literature review of the state-of-the-art experimental and analytical methodologies adopted in the construction industry for the design of mechanically fastened connections and joints in pultruded fibre reinforced polymer framed structures. Results and conclusions obtained from the published literature relating to the effects of critical parameters, which include geometry, material properties, configuration, connecting components, fasteners, lateral restraint, etc. on the mechanical behaviour and failure modes are discussed in the light of addressing gaps in knowledge that need resolving to prepare design guidance that is reliable and robust. Further research required to improve the design of composite mechanically fastened joints is identified as a result of this review.

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“…Later, Hassan, Mohamedien and Rizkalla (1997a) reported an equivalent study for the multi-row situation, in which they modified the Hart-Smith approach by continuing the work of Rosner and Rizkalla (1995a). By choosing to exploit the 'single-row' approach, they failed to be rigorous in how to apply the Hart-Smith method for the J. T. MOTTRAM, 'Prediction of net-tension strength for multi-row bolted connections of pultruded material using the Hart-Smith semi-empirical modeling approach,' Journal of Composites for Construction, 14 1, (2010), 105-114.…”

Section: Model Developmentmentioning

confidence: 99%

Prediction of Net-Tension Strength for Multirow Bolted Connections of Pultruded Material Using the Hart-Smith Semiempirical Modeling Approach

Mottram

2010

J. Compos. Constr.

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Presented in this paper is a study to show that the Hart-Smith semi-empirical modeling approach can be used to predict the net-tension strength of multi-rowed experimental-to-theory strength ratios are < 1.0, and only one of these two could be said to have predicted unsafe net-tension strengths. With none of the ratios exceeding 1.2, it is seen that the simple and versatile modeling approach gives very acceptable predictions. To determine the modeling parameters that will enable the Hart-Smith approach to be in a LRFD design standard there is a need for a comprehensive series of strength tests, for net-tension failure with filled-and open-holes, that covers the complete range of multi-rowed bolted connections that is to be permitted by the standard.

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Rational Model for Multibolted Connections for GFRP Members

Cited by 16 publications

References 2 publications

Modelling and verification of response of RC slabs strengthened in flexure with mechanically fastened FRP laminates

Modelling and verification of response of RC slabs strengthened in flexure with mechanically fastened FRP laminates

A review of the behaviour and analysis of bolted connections and joints in pultruded fibre reinforced polymers

Prediction of Net-Tension Strength for Multirow Bolted Connections of Pultruded Material Using the Hart-Smith Semiempirical Modeling Approach

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