The laminated natural rubber bearings (NRBs) used in offshore or sea-crossing bridges, are subjected to marine environments over an extended period and therefore vulnerable to the effect of alternating ageing and sea corrosion caused by weather conditions such as temperature, rain, sun, sea winds, waves etc. In addition, there are no systematic theories about the tension capability for NRBs now. Therefore, in this paper, the alternating of ageing and sea corrosion test on 12 NRBs was conducted for 60 days to investigate the deterioration trend of its tension shear property with different horizontal shear strains. Test results show that initial tension stiffness, yield stiffness and yield tension stress with different horizontal shear strains, all decrease with the alternating ageing and sea corrosion test time. Further, tension failure stress and strain with 50% and 100% horizontal shear strain, also decreases with the alternating ageing and sea corrosion test time. After testing for 60 days, both the tension failure stress and tension failure strain with 100% horizontal shear strain have the biggest drop. Additionally, only broken rubber is left after NRB failure before and after testing for 60 days.

海上或跨海桥梁中使用的层压天然橡胶轴承（NRB）长时间处于海洋环境中，因此易受温度，雨水，日照，此外，目前还没有关于NRB拉伸能力的系统理论。因此，本文对12个NRB进行了60天的老化和海水腐蚀试验，研究了不同水平剪切应变下其拉伸剪切性能的恶化趋势。试验结果表明，在不同的水平剪切应变下，初始拉伸刚度，屈服刚度和屈服拉伸应力均随着交替的时效和海蚀试验时间而降低。进一步，在水平剪切应变为50％和100％的情况下，拉伸破坏应力和应变也会随着交替的老化和海蚀试验时间而降低。经过60天的测试，拉伸破坏应力和水平剪切应变为100％的拉伸破坏应变降幅最大。此外，在60天的测试前后，NRB失效后只剩下断掉的橡胶。