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Experimental study on mechanical properties of casting high-capacity polyurethane elastomeric bearings
Construction and Building Materials ( IF 7.4 ) Pub Date : 2020-09-10 , DOI: 10.1016/j.conbuildmat.2020.120725
Siqi Wang , Yong Yuan , Ping Tan , Hongping Zhu , Kaitao Luo

The laminated elastomeric bearings are widely used structure isolation devices. However, the production and economic efficiency of current rubber bearings are limited by the long-time high-temperature vulcanization process. This study proposes the use of casting polyurethane elastomer (CPUE) substituting rubber in manufacturing laminated elastomeric bearings whilst considering the formula of conventional and improved shear performance formula. Mechanical properties, such as uniaxial tension, hysteretic shear and anti-peel strength, between the conventional and improved materials were compared, and the findings indicate that the use of block technology by introducing hydroxyl-terminated small molecular alcohol can improve the ultimate deformation and anti-peel ability. Moreover, 2 scale-reduced and 24 full-scale new bearings were employed to investigate their vertical compression and horizontal–lateral deformation ability considering different formulas and shape factors. Test results show that the CPUE bearings equipped large vertical bearing, favourable horizontal deformation and excellent energy dissipation capacity. The comparison between the two types of formulas suggest that the new formula can successfully increase the ultimate deformation and centralised failure mode at the expense of acceptable compression modulus decrease.



中文翻译:

铸造大容量聚氨酯弹性体轴承力学性能的实验研究

层压弹性轴承是广泛使用的结构隔离装置。然而,当前橡胶轴承的生产和经济效率受到长时间高温硫化过程的限制。这项研究建议,在考虑传统配方和改进的剪切性能配方的同时,用铸造聚氨酯弹性体(CPUE)代替橡胶来制造层压弹性轴承。比较了传统材料和改良材料之间的机械性能,例如单轴张力,滞后剪切力和抗剥离强度,研究结果表明,通过引入端羟基的小分子醇引入嵌段技术可以改善最终变形和抗磨性能。 -剥离能力。此外,考虑到不同的公式和形状因子,采用了2个缩小比例的轴承和24个满比例的新型轴承来研究其垂直压缩和水平-横向变形能力。测试结果表明,CPUE轴承配备了较大的垂直轴承,良好的水平变形和出色的耗能能力。两种公式的比较表明,新公式可以以可接受的压缩模量降低为代价,成功地增加极限变形和集中破坏模式。

更新日期:2020-09-11
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