Experimental and analytical investigation of the influence of compressive load on rate-dependent high-damping rubber bearings

Wei, Wei; Tan, Ping; Yuan, Yong; Zhu, Hongping

doi:10.1016/j.conbuildmat.2018.12.086

Cited by 24 publications

(6 citation statements)

References 35 publications

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“…In recent years, rubber isolation bearings have undergone new changes and developments. Considerable efforts have been invested in the development of new rubber isolation bearings [10][11][12][13][14][15][16][17][18]. Compared to ordinary natural rubber isolation bearings and lead-core rubber isolation bearings, high-damping rubber isolation bearings (Figure 3) have plenty of advantages over the both, such as a simple structure, stable mechanical performance, strong energy dissipation capacity, large stiffness before yielding, environmental protection, etc., that make it an excellent choice for base-isolated structures [16].…”

Section: High-damping Rubber Isolation Bearingmentioning

confidence: 99%

Research and Development of High-Performance High-Damping Rubber Materials for High-Damping Rubber Isolation Bearings: A Review

Chen

Song²,

Guan³

2022

Polymers

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At present, high-damping rubber materials, widely used in the field of engineering seismic isolation, generally have the problems such as narrow effective damping temperature range, low damping loss factor and strong temperature dependence, which lead to prominent dependence of temperature and load conditions of the isolation performance of high-damping rubber isolation bearings. Research and development of high-performance high-damping rubber materials with broad effective damping temperature range, high damping loss factor and weak temperature dependence are very urgent and necessary to ensure the safety of the seismic isolation of engineering structures. This paper mainly reviews the recent progress in the research and development of high-damping rubber materials using nitrile butadiene rubber (NBR), epoxidized natural rubber (ENR), ethylene propylene diene rubber (EPDM), butyl rubber (IIR), chlorinated butyl rubber (CIIR), and bromine butyl rubber (BIIR). This is followed by a review of vulcanization and filler reinforcement systems for the improvement of damping and mechanical properties of high-damping rubber materials. Finally, it further reviews the constitutive models describing the hyperelasticity and viscoelasticity of rubber materials. In view of this focus, four key issues are highlighted for the development of high-performance high-damping rubber materials used for high-damping rubber isolation bearings.

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Section: High-damping Rubber Isolation Bearingmentioning

confidence: 99%

Research and Development of High-Performance High-Damping Rubber Materials for High-Damping Rubber Isolation Bearings: A Review

Chen

Song²,

Guan³

2022

Polymers

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“…Rubber material has been widely used in the bearings of bridge structures, and isolation rubber bearings are especially suitable for the design of the seismic isolation for bridges because of their seismic properties [8]. HDRBs consist of high damping rubber layers, providing bearings with horizontal flexibility, reinforced with steel layers that provide vertical stiffness [32], as shown in Figure 1(a). e shape and high damping characteristics of LRBs are similar to that of HDRBs; the difference is that LRBs have lead cores vertically inserted into the bearings, as shown in Figure 1(b).…”

Section: Materials and Mechanical Properties Of Rubber 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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“…The results indicated that as the temperature increased, the hysteresis loop area of the rubber material decreased. In [ 9 ], the influence of compressive load on HDR rate-dependent behavior was clearly emphasized by conducting simple shear tests at different strain rates and compressive stress. When the compressive stress was within the range of 8 MPa to 12 MPa, the maximum shear stress at all strain rates increased by an average of about 20%, with a more significant increase at lower strain rates.…”

Section: Introductionmentioning

confidence: 99%

Developing a New Constitutive Model of High Damping Rubber by Combining GRU and Attention Mechanism

Li,

Peng

2024

Polymers

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High damping rubber (HDR) bearings are extensively used in seismic design for bridges due to their remarkable energy dissipation capabilities, which is critical during earthquakes. A thorough assessment of crucial factors such as temperature, rate, experienced maximum amplitude, and the Mullins effect of HDR on the mechanics-based constitutive model of HDR is lacking. To address this issue, we propose a deep learning approach that integrates the Gate Recurrent Unit (GRU) and attention mechanism to identify time series characteristics from compression-shear test data of HDR specimens. It is shown that the combination of GRU and attention mechanism enables accurate prediction of the mechanical behavior of HDR specimens. Compared to the sole use of GRU, this suggested method significantly reduces model complexity and computation time while maintaining good prediction performance. Therefore, it offers a new approach to constructing the HDR constitutive model. Finally, the HDR constitutive model was used to analyze the impact of experienced maximum amplitudes and cycles on following processes. It was observed that maximum amplitudes directly influence the stress-strain relationship of HDR during subsequent processes. Consequently, a solid foundation is laid for evaluating the responses of HDR bearings under earthquakes.

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Experimental and analytical investigation of the influence of compressive load on rate-dependent high-damping rubber bearings

Cited by 24 publications

References 35 publications

Research and Development of High-Performance High-Damping Rubber Materials for High-Damping Rubber Isolation Bearings: A Review

Research and Development of High-Performance High-Damping Rubber Materials for High-Damping Rubber Isolation Bearings: A Review

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

Developing a New Constitutive Model of High Damping Rubber by Combining GRU and Attention Mechanism

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