Simulation of the dynamic response of concrete beams externally reinforced with carbon-fiber reinforced plastic

Jerome, David M.; Ross, C. A.

doi:10.1016/s0045-7949(97)00022-9

Cited by 47 publications

(19 citation statements)

References 11 publications

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“…For example, a non-contact linear-proximity measuring system [7,11], high speed camera [7,12], accelerometers [4,7]. Here, accelerometers were used to determine the loading point displacement.…”

Section: Determination Of the Loading Point Displacementmentioning

confidence: 99%

A new drop weight impact machine for studying the fracture behaviour of structural concrete

Zhang

Ruiz

2008

WIT Transactions on the Built Environment

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This paper describes the main characteristics of a new drop weight impact machine that has been specifically designed for studying the dynamic mechanical behaviour of structural concrete samples. Such equipment has been used to generate simple and measurable fracture processes under moderate to fast loading rates, as opposed to blast chambers, which produce complicated crack patterns that are difficult to analyze. The machine consists of two main parts, the mechanical structure and the data acquisition system. The former is just a hammer, guided by two robust columns, which can impact the specimen with energy up to 7860 J. The latter consists of piezoelectric force sensors, accelerometers and an optical fibre photoelectric sensor plus oscilloscopes and signal conditioners. The paper also presents the results of some preliminary tests that show the sensitivity of the work of fracture to the loading rate.

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Section: Determination Of the Loading Point Displacementmentioning

confidence: 99%

A new drop weight impact machine for studying the fracture behaviour of structural concrete

Zhang

Ruiz

2008

WIT Transactions on the Built Environment

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“…Several investigators who studied the behaviour of concrete beams under impact loads (Banthia, et al [3]; and Jerome and Ross [4]) also recognised that during the initial period of the impact event, the load measured by the striker and that resisted by the specimen were not identical. They found that the dynamic failure loads measured from the test to be substantially higher than the member capacity (Jerome and Ross [4]). Some researchers reported a ten-fold difference between the recorded impact load on the concrete beams and the beams static load-carrying capacity (Hibbert [20]).…”

Section: Number Of Hitsmentioning

confidence: 99%

“…The difference between the impact load measured on the striker and that applied to the specimen was attributed to specimen inertial effects. There were also some attempts to differentiate the recorded impact load from the inertia effects, assuming that part of the impact load from the striker was absorbed by inertia forces in the impacted body (Venzi [1]; Gopalaratnam, et al [2]; Banthia, et al [3]; Jerome and Ross [4]). They evaluated the equivalent mass of the specimen contributing in the response and multiplied it by the recorded striker acceleration, to produce the time history of the inertia force in the impacted member.…”

Section: Number Of Hitsmentioning

confidence: 99%

“…There has been a trend to express the interaction of the collided bodies in the form of equivalent interface forces (for instance Venzi, et al, [1]; Gopalaratnam, et al, [2]; Banthia, et al, [3]; Jerome and Ross, [4]; Huang, et al, [5]; Laird and Schrems, [6]; Langseth et al, [7]; and Zeinoddini et al, [8]). It was assumed that during an impact a level of load is transferred from the striker to the struck body.…”

Section: Introductionmentioning

confidence: 99%

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Interface Forces in Laterally Impacted Steel Tubes

2008

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In engineering mechanisms, solid bodies frequently come to a contact with a variety of geometric and kinematic situations. There has been a trend to express the interaction of the contacted bodies in the form of equivalent interface forces. The interface force represents the level of load transferred from one body to another. In a static or quasistatic contact problem, the interface forces could be sensibly evaluated by integrating the normal and the shear stresses over the common interfaces. In a dynamic contact, the interface stresses and subsequently the interface forces happen to be more complicated. They are, furthermore, affected by other parameters such as inertia forces, stress waves propagation, the material strain rate dependency and damping. This paper reports interface forces recorded in a series of experimental impact tests on axially pre-compressed steel tubes along with those from the numerical simulations of the tests. To monitor the so called impact loads, two small steel rings as load cells have been built in the striker. Based on the experimental and numerical results, the concept of equivalent interface forces in the impacted tubes has been verified. It has been highlighted that the interface forces (or the impact loads) may vary on the striker or the specimen themselves, depending on the measuring locations. Effects of axial compressions on the interface forces picked up by the striker load cells, impact loads imparted to the specimen supports and on the impact duration have been discussed. It has been reported that the initial compression applied to the tubes does not remain constant during and after the impact event. The amount of variations also depends on the initial level of the tube compression.

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“…Most of this research was dedicated to static conditions and only few works looked into the dynamic aspects of the failure mechanism. In one of the first works that did address dynamic aspects, Jerome and Ross (1997) examined the response of a strengthened beam to a weight drop loading and numerically addressed the response using finite element (FE) analysis. The FRP strip was modeled using truss elements and the concrete substrate was modeled using 2D plane-stress element.…”

Section: Introductionmentioning

confidence: 99%

Experimental and analytical study of the dynamic debonding in FRP plated beams

Mulian

Rabinovitch

2016

International Journal of Solids and Structures

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a b s t r a c tThis paper presents an experimental study of the dynamic debonding failure mechanism in FRP plated beams. The experimental study is accompanied by an analytical/numerical study. The focus in the experimental investigation is on the dynamic aspects of the brittle, rapid, and abrupt failure mechanism and on its characterization and quantification. The experimental technique is based on four point bending tests of FRP plated steel beam specimens. The main dynamic monitoring technique uses high-speed digital photography with rate of 88,050 frames per second. The analytical and numerical aspects of the investigation use an extended high order layered beam theory with a physical modeling resolution that considers nucleation and evolution of the debonding mechanism in each physical interface. This is achieved by using cohesive interfaces and a specially tailored finite element formulation that is based on the theory. Digital image processing of the experimental results reveals and quantifies the dynamics of the interfacial failure with propagation velocities in the order of 100-1000 m/s and duration of less than 0.2 ms. The results reveal the dynamic nature of the failure process and provide an experimental benchmark for its consideration. They also provide direct experimental data for supporting and validating the theory and for determining the fracture energy and length scale parameters of the cohesive interfaces. With that, the combined experimental and theoretical study further explores the dynamic features of the failure mechanism.

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Simulation of the dynamic response of concrete beams externally reinforced with carbon-fiber reinforced plastic

Cited by 47 publications

References 11 publications

A new drop weight impact machine for studying the fracture behaviour of structural concrete

A new drop weight impact machine for studying the fracture behaviour of structural concrete

Interface Forces in Laterally Impacted Steel Tubes

Experimental and analytical study of the dynamic debonding in FRP plated beams

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