钢筋沥青隔震层弹性极限状态方程研究

Research on stability of resilience of reinforced asphalt isolated layer

基于钢筋沥青隔震层的基本构造和工作原理,将钢筋沥青隔震层在地震作用下的竖向受力钢筋简化为上端有水平力作用下的理想轴心压杆模型,依据钢筋平面内稳定推导出钢筋沥青隔震层的弹性临界承载力与弹性极限位移公式,从而得到隔震层减震系数公式。通过单质点钢筋隔震层模型、钢筋沥青隔震层模型振动台试验验证,结果表明理论和试验符合较好。根据减震系数应用弹性临界承载力与弹性极限位移公式,能得到钢筋沥青隔震层的所有设计参数,可供设计参考和使用。

This paper introduces the basic structure and working principle of steel reinforced steel-asphalt isolated layer, and simplifies the vertical reinforcement force mode of reinforced steel asphalt isolated layer under the action of earthquake to an ideal axial compression pole model with horizontal force, and deduces the elastic critical bearing capacity and elastic limit displacement formula of reinforced asphalt isolated layer according to the stability of the steel reinforced plane so as to obtain the formula of damping coefficient of seismic isolation layer. Through the single-point reinforced-steel isolation layer model and reinforced asphalt-rock vibration isolation table model test, the results show that the theory and test are in good agreement. According to the elastic critical bearing capacity applied with damping coefficient and elastic limit displacement formula, all the design parameters of steel asphalt isolated layer can be obtained for design reference and use.