Strength Estimation of Joints in Floating Concrete Structures Subjected to Shear

Yang, In-Hwan; Kim, Kyung-Cheol

doi:10.5394/kinpr.2013.37.2.155

Cited by 3 publications

(1 citation statement)

References 9 publications

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“…The interfacial behavior after MSAE application seemed to be adequate for maintaining continuity across the concrete module interface. When concrete floating structures are constructed by module connection, pre-bonding of modules by MSAE before PS has the advantage of maintaining continuity over the interface until ultimate failure [21]. Also, MSAE application at the interface allows continuous load transmission and stress distribution between the attached modules, allowing them to behave as one unit.…”

Section: Post Cracking Post Crackingmentioning

confidence: 99%

Stable Failure-Inducing Micro-Silica Aqua Epoxy Bonding Material for Floating Concrete Module Connection

et al. 2015

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Abstract:Many recent studies in the development of floating concrete structures focused on a connection system made of modules. In the connection system, the modules are designed to be attached by pre-stressing (PS) while floating on the water, which exposes them to loads on the surface of the water. Therefore, the development of a pre-connection material becomes critical to ensure successful bonding of floating concrete modules. Micro-silica mixed aqua-epoxy (MSAE) was developed for this task. To find the proper MSAE mix proportion, 0% to 4% micro-silica was mixed in a standard mixture of aqua-epoxy for material testing. Also, the effect of micro-silica on the viscosity of the aqua epoxy was evaluated by controlling the epoxy silane at proportions of 0%, 5%, and˘10%. After completion of the performance tests of the MSAE, we evaluated the effect of MSAE in a connected structure. The plain unreinforced concrete module joint specimens applied with MSAE at thicknesses of 5, 10, and 20 mm were prepared to be tested. Finally, we evaluated the performance of MSAE-applied reinforced concrete (RC) module specimens connected by PS tendons, and these were compared with those of continuous RC and non-MSAE-applied beams. The results showed that the mix of micro-silica in the aqua-epoxy changed the performance of the aqua-epoxy and the mix ratio of 2% micro-silica gave a stable failure behavior. The flexural capacity of concrete blocks bonded with MSAE changed according to the bond thickness and was better than that of concrete blocks bonded with aqua-epoxy without micro-silica. Even though MSAE insignificantly increases the load-carrying capacity of the attached concrete module structure, the stress concentration reduction effect stabilized the failure of the structure.

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Section: Post Cracking Post Crackingmentioning

confidence: 99%

Stable Failure-Inducing Micro-Silica Aqua Epoxy Bonding Material for Floating Concrete Module Connection

et al. 2015

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Shear strength of steel fiber reinforced lightweight self-consolidating concrete joints under monotonic and cyclic loading

Choi

Lee

Yuan

et al. 2023

Construction and Building Materials

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Micro-silica Mixed Aqua-epoxy for Concrete Module Connection in Water : Part 1 - Material Development and Evaluation

Choi¹,

Kim²,

You³

et al. 2015

Journal of the Korea Concrete Institute

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Recent studies on concrete floating structure development focused on connection system of concrete modules. Precast concrete modules are designed to be attached by prestressing in the water, exposing the structure to the loads from water and making the construction difficult. Therefore, a development of bond material became a key issue in successful connection of floating concrete modules. In this study, micro-silica mixed aqua epoxy (MSAE) is developed for the task. Existing primer aqua epoxy, originally used as a bond material for the retrofit of concrete structures using fiber reinforced polymers, is evaluated to find the optimum micro-silica added mix proportion. Micro-silica of 0~4 volume % was mixed in standard mixture of aqua epoxy. Then, the material property tests were performed to study the effect of micro-silica in aqua epoxy by controlling the epoxy silane proportion by 0, ±5, ±10%. The optimum mix design of MSAE was derived based on the test results. The MSAE was used to connect concrete module specimens with the epoxy thickness variation of 5, 10, and 20mm. Then, 3-point loading test was performed to verify the bond capacity of MSAE. The results show that MSAE improves the bond capacity of concrete module.

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Strength Estimation of Joints in Floating Concrete Structures Subjected to Shear

Cited by 3 publications

References 9 publications

Stable Failure-Inducing Micro-Silica Aqua Epoxy Bonding Material for Floating Concrete Module Connection

Stable Failure-Inducing Micro-Silica Aqua Epoxy Bonding Material for Floating Concrete Module Connection

Shear strength of steel fiber reinforced lightweight self-consolidating concrete joints under monotonic and cyclic loading

Micro-silica Mixed Aqua-epoxy for Concrete Module Connection in Water : Part 1 - Material Development and Evaluation

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