波形钢板-橡胶界面黏结滑移性能

Bond-slip properties of corrugated steel plate-rubber interface

  • 摘要: 波形钢板-橡胶构件因波形钢板的几何形状优势,表现出良好的抗震性能,对其界面黏结滑移性能有待研究。考虑波形钢板与橡胶界面的粘结长度、粗糙度和试件的加载方式对两者界面性能的影响,设计了6个波形钢板-橡胶试件进行往复加载试验,根据黏结破坏过程、界面耗能、应变分布和影响因素分析试件的黏结性能。结果表明:波形钢板-橡胶界面受往复荷载作用时,黏结破坏依次经历微滑移、滑移、破坏、曲线下降和残余阶段;从能量角度分析发现:粘结长度的长短显著影响界面耗能;合理控制粗糙度,可改善试件界面耗能,提高界面黏结性能;波形钢板-橡胶构件在荷载较大时,应变发生突变且波脊处影响最大;与单调加载相比,往复加载下试件的残余黏结滑移降低29%;波形钢板-橡胶试件的极限特征黏结强度随粘结长度和粗糙度的增大呈现出先增加后逐步减弱;最后确定了波形钢板与橡胶构件的特征黏结强度计算公式,并进行了计算值与试验值的比较,其吻合度较好。

     

    Abstract: Due to the geometric advantages of corrugated steel plates, corrugated steel plates-rubber members exhibit good seismic performance. The bond-slip property of their interface requires investigation. To study the interface properties of corrugated steel plate and rubber, 6 specimens were designed for reciprocal loading tests, considering bonding length, roughness, and loading mode effects. Analysis of the specimens' bonding properties involve examining bonding failure processes, interfacial energy dissipation, strain distribution and influencing factors. Results indicate that under reciprocal loads, bonding failure progresses through micro-slip, slip, failure, curve decline and residual stages. Energy analysis reveals that the bond length's magnitude significantly affects the interfacial energy dissipation. Reasonable control of roughness can improve the specimen interfacial energy dissipation and improve the interfacial bonding performance. High loads on corrugated steel plates and rubber members cause abrupt strain changes, with the wave ridge experiencing the most significant impact. Residual bond slip under reciprocal loading is 29% lower than under monotone loading. The ultimate characteristic bond strength of the corrugated steel plate-rubber specimens shows an increase and then a gradual decrease with the increase of bond length and roughness; Formulas for calculating characteristic bond strength for these members are established, with calculated values compared to experimental results showing a good coincidence.

     

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