Experimental Study on Friction and Sliding Performance of Laminated-Rubber Bearings Based on Shear Aging Resistance

CUI Haomeng; SHAO Changjiang; WANG Chunyang; XUE Hao; GAO Jian; LI Zhizhong; ZHUANG Weilin; QI Qiming

doi:10.3969/j.issn.0258-2724.20240180

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Journal of Southwest Jiaotong University > 2025 >

CUI Haomeng, SHAO Changjiang, WANG Chunyang, XUE Hao, GAO Jian, LI Zhizhong, ZHUANG Weilin, QI Qiming. Experimental Study on Friction and Sliding Performance of Laminated-Rubber Bearings Based on Shear Aging Resistance[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20240180

Citation:

CUI Haomeng, SHAO Changjiang, WANG Chunyang, XUE Hao, GAO Jian, LI Zhizhong, ZHUANG Weilin, QI Qiming. Experimental Study on Friction and Sliding Performance of Laminated-Rubber Bearings Based on Shear Aging Resistance[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20240180

Citation:

CUI Haomeng, SHAO Changjiang, WANG Chunyang, XUE Hao, GAO Jian, LI Zhizhong, ZHUANG Weilin, QI Qiming. Experimental Study on Friction and Sliding Performance of Laminated-Rubber Bearings Based on Shear Aging Resistance[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20240180

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Experimental Study on Friction and Sliding Performance of Laminated-Rubber Bearings Based on Shear Aging Resistance

doi: 10.3969/j.issn.0258-2724.20240180

1.
School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
2.
National Engineering Research Center of Geological Disaster Prevention Technology in Land Transportation, Southwest Jiaotong University, Chengdu 610031, China
3.
Sichuan Shuangjian R & B Machinery Co, Ltd, Chengdu 611430, China
4.
Sichuan Communication Surveying and Design Institute Co., Ltd., Chengdu 610017, China
5.
School of Architecture and Civil Engineering, Chengdu University, Chengdu 610106, China

Received Date: 10 Apr 2024
Accepted Date: 19 Mar 2025
Rev Recd Date: 02 Jul 2024

Available Online: 24 Mar 2025

Abstract

Abstract

To investigate the friction and sliding performance of laminated-rubber bearings under aging conditions, heat aging tests and quasi-static tests were conducted based on the related provisions of shear aging resistance in the bearing specification. Firstly, the actual working state of the bearing in bridge engineering was simulated. Then, the bearing samples were subjected to hot air accelerated aging treatment through an aging chamber and then to horizontal cyclic quasi-static loading through a compression-shear machine. Finally, comparative analyses were conducted on the deformation state, hysteresis behavior, and related mechanical responses of the bearing specimens under different loading conditions. The results show that the shear deformation degree of the aged specimens is large during loading; the sliding degree is small, and the hysteresis loop is narrow and long. The sliding displacement of the bearings is negatively correlated with surface pressure and loading rate. The shear stiffness of the bearings first decreases and then increases as γ_ESS rises, and the shear stiffness of aged specimens decreases; the equivalent stiffness increases. At the average surface pressure of 10 MPa during the use of the bearings, there is less difference in the friction coefficient between the two types of specimens, both of which are lower than the recommended value of 0.20 in the specifications. The friction coefficient of the aged specimens is generally greater than that of unaged specimens, and insufficient energy dissipation is observed. There is a performance change point in the unaged specimens, and the overall mechanical behavior shows a three-fold trend. However, the friction and sliding behaviors of the aged specimens are stable, and there is no sudden change as the equivalent shear strain increases from 0 to 250%.
- laminated-rubber bearing,
- shear aging resistance,
- heat aging test,
- quasi-static test,
- friction and sliding performance

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