倾斜旋转型三维隔震装置的力学模型和竖向性能试验研究

摘要

基于铅芯橡胶隔震支座的变形及耗能力学性能特点,设计开发出一种新型的倾斜旋转型三维隔震装置,给出了三维隔震装置的组成构造和力学性能设计方法,提出了三维隔震装置的变形机理,推导了三维隔震装置的刚度和阻尼的理论计算公式.设计了倾斜旋转型三维支座的模型支座系统,并完成了竖向压缩力学性能试验.试验结果表明该倾斜旋转型三维隔震装置构造合理、传力机制明确,在竖向变形状态下具有良好的阻尼耗能性能;试验得到的支座刚度和理论计算刚度一致性较好.%A new three-dimensional seismic isolation device based on mechanical properties including deformation and energy dissipation of lead core rubber bearings was proposed.The progress of its three-dimensional seismic isolation was introduced.The components and mechanic properties of the device were described.The theoretical calculation formulas for its stiffness and damping were derived.The model of the 3 D rotational seismic isolation device was designed,and its vertical compression tests were performed.The test results showed that the three-dimensional seismic isolation device is reasonably designed with a clear force transmission mechanism;it has a suitable vertical stiffness and a good energy-dissipating capacity;the designed data and test data of its vertical stiffness agree well each other.