Fatigue Analysis of RC Slabs Reinforced with Plain Bars Based on the Bridging Stress Degradation Concept

Drar, Ahmed Attia M.; Matsumoto, Takashi

doi:10.3151/jact.14.21

Cited by 9 publications

(6 citation statements)

References 10 publications

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“…Based on this concept, a numerical model for analyzing the fatigue behaviors of the panel RC slabs was developed, with which the fatigue life was predicted successfully (Suthiwarapirak and Matsumoto 2006). The bridging stress degradation concept was further extended to analyze the fatigue behaviors of the panel RC slabs reinforced with plain bars (Drar and Matsumoto 2016). These studies confirm the applicability of the numerical model based on the bridging stress degradation concept for the panel RC slabs subjected to moving wheel loads.…”

Section: Introductionmentioning

confidence: 66%

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Approximate Analytical Conditions of a Panel RC Slab for Reproducing the Fatigue Behaviors of a Real Bridge RC Slab

Khan

Deng

Matsumoto

2020

ACT

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This study proposes approximate boundary conditions for a panel reinforced concrete (RC) slab to simulate the fatigue behaviors of a real bridge RC slab. To validate the approach, fatigue analysis of the panel RC slab is conducted using a finite element method (FEM) based numerical model with the bridging stress degradation concept. Both the proposed approximate boundary conditions, and those that have been typically employed in past studies, are used. The numerical results demonstrate that the panel RC slab with approximate boundary conditions experiences the same bending moment distribution and deformations around the loading locations as the load moves along the slab axis, similar to those of a real bridge RC slab. Moreover, the approximate boundary conditions reproduce the extensive grid crack pattern in the panel RC slab, which is similar to that generally observed in a real bridge RC slab. The results of this study establish that panel RC slab with approximate boundary conditions behaves in a similar manner to a real bridge RC slab, which results in a more realistic fatigue life estimation.

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Section: Introductionmentioning

confidence: 66%

“…Similarly, the third crack can start in the perpendicular direction to the existing two cracks when the tensile strain in that direction exceeds the cracking strain as shown in Fig. 6(b) (Drar and Matsumoto 2016).…”

Section: Concrete Modelmentioning

confidence: 98%

Approximate Analytical Conditions of a Panel RC Slab for Reproducing the Fatigue Behaviors of a Real Bridge RC Slab

Khan

Deng

Matsumoto

2020

ACT

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“…1. Crack propagation due to bridging stress degradation at first cycle and after N cycles (Drar and Matsumoto 2016) where f Ã y is the effective yield stress (Belarbi and Hsu 1994), S y is the slip displacement of a steel bar at yield point (Zhao and Sritharan 2007), l d is the transmission length of bond stress, e y and e Ã y are the explicit and effective yield strain, respectively.…”

Section: Reinforcing Barmentioning

confidence: 99%

“…For RC slabs reinforced with plain bars, the proposed numerical method by Drar et al (2015); and Drar and Matsumoto (2016) was employed to predict their fatigue life and behaviors. Therefore, this study can be extended to examine the effect of FRP strengthening on these slabs.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Analysis of FRP Strengthened RC Slabs Reinforced with Plain Bars Under Moving Load

Drar

Matsumoto

2017

Sustainable Civil Infrastructures

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Abstract. In Japan, old RC bridge-deck slabs were economically designed by small thickness without considering the fatigue resistance. These slabs are subjected to a huge repetition of moving loads. Therefore, they are suffering from fatigue damage. This damage is more significantly observed than that of slabs reinforced with deformed bars. To extend their fatigue life, a suitable strengthening technique is required such as externally bonded FRP sheets. Using numerical method for predicting the improvement in their fatigue life is strongly beneficial to take full advantage of this strengthening technique. This study presents a proposed numerical method based on bridging stress degradation concept to analyze two full scale RC slabs reinforced with plain bars under moving load. One of them is strengthened with externally bonded FRP sheets in longitudinal and transverse directions on the slab bottom surface. The interfacial bond behavior between FRP sheet and concrete surface with its degradation due to fatigue loading is implemented. This study provides the propagation of cracked elements, center displacement evolution, cracking pattern and FRP strain. For the strengthened RC slab, the major crack opening is restricted by the contribution of FRP sheets in longitudinal and transverse directions. Therefore, the strengthened RC slab shows longer fatigue life and smaller deformation. By comparing these numerical results with the experimental results, the current numerical method provides a good agreement.

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“…Loading distribution is the key element to the bridge engineers in the design and analysis of bridges because the slab in every bridge is designed for their loading (Drar et al 2016)]. Furthermore, it is also important to know the width of the slab which is effective in carrying the bridge loading.…”

Section: Introductionmentioning

confidence: 99%

Proposed Effective Width Criteria for Slab Deck Bridges under Military Tracked Load

Abdulrahman¹

2020

uod

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For any slab deck bridge, the ultimate loading strength is obtained based on the distribution of that loading to a slab effective width that recommended in the adopted specifications. In this study, a simplified procedure with a design equation is presented. This procedure depends on the determination of the moments developed in a slab deck bridge and thus the slab effective width that loading is distributed to. The study employs the Iraqi military tracked load. The procedure applies to right, simply supported slab deck bridges with and without edge stiffening beams based on the aspect ratio that represents the ratio of the slab width to length. A 3D finite element analysis by a well-known programme ABAQUS was conducted to analyse the whole bridges and to give the values of moments that will be used in the derivation of an equation to calculating the slab effective width. Furthermore, a comparison between the effective width of this study and the AASHTO and LRFD specifications was conducted. It is found that this method gives some conservative results in comparison with AASHTO and LRFD standards because other standards have some limitations, besides not to take in consideration all the parameters required.

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Fatigue Analysis of RC Slabs Reinforced with Plain Bars Based on the Bridging Stress Degradation Concept

Cited by 9 publications

References 10 publications

Approximate Analytical Conditions of a Panel RC Slab for Reproducing the Fatigue Behaviors of a Real Bridge RC Slab

Approximate Analytical Conditions of a Panel RC Slab for Reproducing the Fatigue Behaviors of a Real Bridge RC Slab

Fatigue Analysis of FRP Strengthened RC Slabs Reinforced with Plain Bars Under Moving Load

Proposed Effective Width Criteria for Slab Deck Bridges under Military Tracked Load

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