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Experimental and computational verification of reasonable design formulae for base-isolated structures

机译：隔震结构合理设计公式的试验和计算验证

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摘要

It is clear that base isolation is a sensible strategic design in attenuating the responses of a structural system induced by ground motions. The design of seismically isolated structures is mainly governed by the Uniform Building Code (UBC) published by the International Conference of Building Officials. The UBC code emphasizes a simple, statically equivalent design method that displacements of an isolated structure are concentrated at the isolation level. Therefore, the superstructure nearly moves as a rigid body and the design forces of elements above isolators are based on the behaviour of isolators at the design displacement. However, in the UBC code, the distribution of inertial (or lateral) forces over the height of the superstructure above isolation has been found to be too conservative for most isolated structures. In view of this, two simple and reasonable design formulae for the lateral force distribution on isolated structures have been proposed in this paper. Results obtained from a full-scale isolated structure tested on the shaking table and numerical analyses of two additional examples verify the suitability of design formulae. It is illustrated that the proposed formulae can predict well the lateral force distribution on isolated structures during earthquakes.
机译：显然，基础隔离是衰减地震动引起的结构系统响应的明智策略设计。地震隔离结构的设计主要受国际建筑官员会议发布的统一建筑规范（UBC）的约束。 UBC代码强调了一种简单的静态等效设计方法，即，将隔离结构的位移集中在隔离级别。因此，上部结构几乎作为刚体运动，并且隔离器上方的元件的设计力基于设计位移时隔离器的行为。但是，在UBC规范中，发现惯性力（或横向力）在隔离之上的上部结构高度上的分布对于大多数隔离结构而言过于保守。有鉴于此，本文提出了两种简单合理的隔离结构侧向力分布设计公式。从振动台上测试的全尺寸隔离结构获得的结果以及两个其他示例的数值分析证明了设计公式的适用性。结果表明，所提出的公式可以较好地预测地震过程中隔震结构的侧向力分布。

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