Influence of Steel Reinforcement on the Performance of Elastomeric Bearings

Kalfas, Konstantinos N.; Mitoulis, Stergios A.; Konstantinidis, Dimitrios

doi:10.1061/(asce)st.1943-541x.0002710

Cited by 40 publications

(8 citation statements)

References 33 publications

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“…The steel shims constrain the global lateral bulging of the rubber to guarantee a certain vertical stiffness of the bearing. [ 41 ] The vertical stiffness of an elastomeric isolator depends on the instantaneous compression modulus E c of an elastomer layer which has both sides provided with plates. E c is estimated using the relationship proposed by [ 34,42 ]

E_{normalc} = E_{0} false(1 + 2 k' S false)

where E 0 is the compression modulus for unconfined rubber in a test machine for the stain of a few percent.…”

Section: Instantaneous Compression Modulusmentioning

confidence: 99%

The Effect of Graphene Ultrasonic Coating on Recycled Rubber

Marsico

Monsalve

et al. 2022

Adv Eng Mater

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Herein, the mechanical behavior of a graphene‐recycled rubber compound is investigated by performing static and dynamic tests. Water‐based graphene suspension is deposited on recycled rubber pads via an electrostatic addition process. Results on tensile and compression tests indicate a significant improvement of the compound in strength and in damping. They also indicate that the compound experiences significant elongation (up to 500%) as well as withstands high tensile forces, 300% greater than the force that the recycled rubber mix would withstand. The effective compression modulus of the compound is also shown to increase by about 3.2 times at 10% strain with respect to the one for the recycled rubber mix. Results suggest that the graphene‐recycled rubber compound can deliver a sustainable solution for vibration mitigation applications.

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E_{normalc} = E_{0} false(1 + 2 k' S false)

where E 0 is the compression modulus for unconfined rubber in a test machine for the stain of a few percent.…”

Section: Instantaneous Compression Modulusmentioning

confidence: 99%

The Effect of Graphene Ultrasonic Coating on Recycled Rubber

Marsico

Monsalve

et al. 2022

Adv Eng Mater

View full text Add to dashboard Cite

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“…e characteristics, such as bearings constructability, availability, and technique, are also very important to build a bridge, but the safety of the bridge, especially seismic performance, was studied in this paper [49]. erefore, the No.…”

Section: Case Setting Of Bearingsmentioning

confidence: 99%

Study on the Seismic Performance of Different Combinations of Rubber Bearings for Continuous Beam Bridges

Wang

2020

Advances in Civil Engineering

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Rubber isolation bearings have been proven to be effective in reducing the seismic damage of bridges. Due to the different characteristics of isolation bearings, the mechanical properties of bridges with different combinations of rubber bearings are complex under the action of earthquakes. This paper focuses on the application of combinations of rubber isolation bearings on seismic performance of continuous beam bridges with T-beams. The seismic performances of continuous beam bridges with different combinations of rubber isolation bearings, pier height, and span length were studied by the dynamic time history analysis method. It was found that the bridges with natural rubber bearings (NRBs) have the largest seismic responses compared to the other types of bearings. The continuous beam bridge with isolation bearings, such as lead rubber bearings (LRBs) and high damping rubber bearings (HDRBs), has approximately 20%∼30% smaller seismic response than that with NRBs under the action of earthquakes due to the hysteretic energy of the bearings, indicating that the isolation bearings improve the seismic performance of the bridge. The continuous beam bridges with both NRBs and LRBs or NRBs and HDRBs have larger seismic response of the piers than those with a single type of isolation bearings (LRBs or HDRBs) but smaller seismic response of the piers than those with only NRBs. For a continuous beam bridge with shorter span and lower pier, it is not economical to use LRBs or HDRBs underneath every single girder, but it is more reasonable to use cheaper NRBs underneath some girders. The larger difference in stiffness of the bearings between the side and middle piers leads to the more unbalanced seismic response of each pier of the bridge structure. The results also show that with increasing pier height and span length, the difference in the seismic response value between the cases gradually increases.

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“…e limitations of the investigations lie in the inability to address the details of the mechanical behaviours of interlaminated rubber layers [4], and the traditional approach cannot handle the influence of geometric and material parameters of each rubber layer. In addition, according to the results of finite element analysis, Kalfas et al [11,12] found the damage magnitude of each rubber layer and steel shim is different after the bearing under a certain load. When Haringx's theory is applied to the damage identification of laminated rubber bearings, the damage of certain layers cannot be located; consequently, the early minor damage in the bearings is difficult to identify.…”

Section: Introductionmentioning

confidence: 99%

Damage Detection of Laminated Rubber Bearings Based on the Antiresonance Frequencies of Periodic Structure and Its Sensitivity Analysis

Zhang

Zhu

Weng

2022

Shock and Vibration

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An isolation bearing consumes most of the seismic energy of a structure and is vulnerable to destruction. The performance of isolation bearings is usually evaluated according to the global stiffness and energy dissipation capacity. However, the early minor damage in isolation bearings is difficult to identify. In this study, a damage detection scheme for the isolation bearing is proposed by focusing on the antiresonance of the quasiperiodic structure. Firstly, a laminated rubber bearing was simplified as a monocoupled periodic rubber-steel structure. The characteristic equation of the driving point antiresonance frequency of the periodic system was achieved via the dynamic stiffness method. Secondly, the sensitivity coefficient of the driving point antiresonance, which was obtained from the first-order derivative of the antiresonance frequency, with respect to the damage scaling parameter was derived using the antiresonance frequency characteristic equation. Thirdly, the optimised driving points of the antiresonance frequencies were selected by means of sensitivity analysis. Finally, from the measured changes in the antiresonance frequencies, the damage was identified by solving the sensitivity identification equation via a numerical optimisation method. The application of the proposed method to laminated rubber bearings under various damage cases demonstrates the feasibility of this method. This study has proven that changes in the shear modulus of each rubber layer can be identified accurately.

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Influence of Steel Reinforcement on the Performance of Elastomeric Bearings

Cited by 40 publications

References 33 publications

The Effect of Graphene Ultrasonic Coating on Recycled Rubber

The Effect of Graphene Ultrasonic Coating on Recycled Rubber

Study on the Seismic Performance of Different Combinations of Rubber Bearings for Continuous Beam Bridges

Damage Detection of Laminated Rubber Bearings Based on the Antiresonance Frequencies of Periodic Structure and Its Sensitivity Analysis

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