1.北方工业大学土木工程学院,北京 100144
2.中交公路长大桥建设国家工程研究中心有限公司, 北京 100088
3.交通运输部公路科学研究所,北京 100088
4.应急管理部国家自然灾害防治研究院,北京 100085
李悦(1979—),男,副教授,博士(后),硕导。主要从事工程结构以及桥梁的抗震减灾研究。Email:liyue@ncut.edu.cn
纸质出版:2022-04-28
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李悦,高崇铭,李冲等.海蚀环境下考虑摩擦滑移的桥梁板式橡胶支座老化剪切性能研究[J].防灾减灾工程学报,2022,42(02):340-346.
LI Yue,GAO Chongming,LI Chong,et al.Research on the Aging Shear Performance of Plate Rubber Bearings in Bridges Considering Frictional Slip in Marine Corrosion Environment[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(02):340-346.
李悦,高崇铭,李冲等.海蚀环境下考虑摩擦滑移的桥梁板式橡胶支座老化剪切性能研究[J].防灾减灾工程学报,2022,42(02):340-346. DOI: 10.13409/j.cnki.jdpme.202111016.
LI Yue,GAO Chongming,LI Chong,et al.Research on the Aging Shear Performance of Plate Rubber Bearings in Bridges Considering Frictional Slip in Marine Corrosion Environment[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(02):340-346. DOI: 10.13409/j.cnki.jdpme.202111016.
板式橡胶支座作为海蚀环境中桥梁结构体系中的重要支撑构件,其摩擦滑移与橡胶老化会影响桥梁结构整体的抗震性能。为了探究海蚀环境下考虑摩擦滑移的桥梁板式橡胶支座老化剪切性能,开展了板式橡胶支座的摩擦滑移试验,并采用有限元方法,分析了橡胶老化对各形状系数的板式橡胶支座的剪切性能和摩擦滑移的影响。结果表明:①支座的摩擦滑移起始位移随着老化时间的增长和形状系数的增大而不断变大;②随着老化时间的增加,支座通过摩擦滑移消耗的能量也会逐渐增多;③支座的等效黏滞阻尼比随着老化时间和形状系数的增加而变大。海蚀环境会加速板式橡胶支座的老化并影响其剪切性能,因此在海蚀较为严重的地区进行桥梁抗震设计时应考虑支座摩擦滑移及老化对桥梁地震动力响应的影响。
Plate rubber bearing is an important supporting member in the bridge structure system in the marine corrosion environment. The frictional slip and rubber aging will affect the overall seismic performance of the bridge structure. To investigate the aging shear performance of bridge plate rubber bearing considering frictional slip under the marine corrosion environment, the frictional slip test on the plate rubber bearing was carried out, and the effect of rubber aging on the shear performance and frictional slip of the plate rubber bearings with various shape factors was analyzed by the finite element method. The results show that: (1) The initial frictional slip of the bearing increases with the increase of aging time and the shape factor; (2) The energy consumed by the bearing through frictional slip gradually increases with the aging time; (3) The equivalent viscous damping ratio of the bearings increases with the aging time and the shape factor. Marine corrosion environment will accelerate the aging of the plate rubber bearing and affect its shear performance, so the influence of bearing frictional slip and aging performance on the seismic dynamic response of bridges should be considered in the seismic design of bridges in areas with more serious marine corrosion environment.
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