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

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。

Tests for mechanical model of an inclined rotational three-dimensional seismic isolation device and its vertical performance

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 3D 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.