组合隔震技术在高烈度区复杂高层结构中的应用研究

为探讨近断层的复杂高层建筑结构的隔震设计要点，结合某高层医院建筑结构设计实例，研究9度设防强地震输入、体型特别不规则和高预期抗震性能目标条件下采用隔震技术的适应性及对应措施，提出发挥不同隔震器件和减震装置性能特点的组合隔震技术方法。结果表明，组合隔震可减小隔震橡胶支座面压和水平变形，减少塔楼偏置引起的结构扭转效应、竖向高位收进引起的高振型效应，结构构件损伤程度和范围大幅降低，屈服耗能机制更为合理，有效提升了建筑结构的抗震能力。分析比较近场速度脉冲型地震波与考虑1.5近场增大系数的常规地震波作用下复杂高层隔震结构的地震响应差别，结果表明，在速度脉冲型地震波作用下的隔震层位移、上部结构层间位移角及层剪力均大于考虑1.5近场增大系数的常规地震波，采用1.5近场增大系数不能包络近场地震效应，隔震设计时应慎重考虑。

Application research of combined isolation technology in complex high-rise building in high seismic intensity region

In order to discuss the key issues of seismic isolation design for complex high-rise building under the near-fault pulse-like ground motion, a hospital building structure was designed to study the adaptability and corresponding measures of isolation technology with strong 9-degree seismic fortification earthquake input , where irregular building shape and high expected seismic performance targets were especially investigated. A combined isolation technology method, which can fully utilize the performance characteristics of different isolation devices and shock absorption devices, was proposed. The results show that the strategy can reduce the surface pressure and horizontal deformation of rubber bearings, and reduce the torsion effect caused by tower offset and high vibration mode effect caused by high-level retraction of the building shape on the dynamic property of the building structure. The strategy can also greatly reduce the damage to structural components, the yield energy dissipation mechanism is more reasonable, and the seismic capacity of the building structure is effectively improved. The seismic responses of the structure under near-fault pulse-like seismic excitations and conventional far-field seismic excitations with near-fault coefficient of 1.5 were analyzed and compared, and the results show that the displacement of the isolation layer, inter-story displacement angle and floor shear of the building structure under the near-fault pulse-like seismic excitations are all larger than that of the conventional seismic wave with near-fault coefficient of 1.5, that is, the coefficient of 1.5 considering the near-fault effect cannot cover the actual near-fault pulse-like ground motion effect, which should be carefully considered in the isolation design.