过载防护型黏滞阻尼器的振动控制机理及试验研究

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中图分类号：TU352.1 文献标志码：A DOI： 10.15935/j.cnki.jggcs.202504.0011

AbstractAcombined base-isolation system incorporating isolation bearings and additional dampers can effectively mitigate seismic forces and control the deformation response of the isolation layer to acertain extent. However，under multi-level seismic excitations，combined isolation systems employing conventional viscous dampers generate excessively high damping forces，which compromise the isolation effectiveness.To address this issue，a viscous damper with overload protection （VD-OP）and its corresponding combined isolation system are proposed in this study.The design，fabrication，and experimental testing of the VD-OP were conducted，and a mechanical model describing its nonlinear damping and overload protection characteristics was established basedon experimental datacalibration.The efectiveness of the VD-OP combined isolation system and its advantages in multi-level vibration control were verified.The results indicate thatthe proposed VD-OP system exhibits a velocity-dependent nonlinear damping mechanism and force-limiting capability， effectively preventing excessive damping forces induced by high-level seismic excitations，enhancing isolation efficiency，and controlling the acceleration response of the isolated structure.The performance-based design approach proposed in this study provides practical guidance for the implementation of VD-OP systems and offers a reference for the seismic mitigation design of structures in high-intensity seismic regions.

Keywordscombined isolation，nonlinear viscous damper，overload protection，acceleration control

0 引言

隔震技术可以有效控制被隔震结构的地震响应，通过在上部结构与基础之间设置柔性隔震层[1-2]，显著降低地震力的传递，实现建筑结构与地面运动输入的解耦，进而有效降低结构加速度、层间位移和剪力等响应，确保结构及其内部人员的安全[3-4]。（剩余13361字）