ABSTRACT

The rocking response of anchored rigid bodies with irregular geometry is evaluated, incorporating the non-linearity of restrainers. A parametric analysis is performed, introducing the concept of Probability Reduction Spectra (PRS) to identify the influence of the main parameters into the rocking response as a function of the fundamental frequencies (excitation/body). The results allow identifying the conditions where anchoring systems are more suitable for different types of excitations. Restrainers have a better performance for slender bodies under impulsive motions (near source) with any eccentricity up to the center of geometry. For seismic excitations, from far or intermediate-depth sources, it is evident a PRS’ band where anchorage is effective. Independently of the kind of excitation, bodies with low and/or asymmetric center of mass could suddenly overturn under abrupt peak intensities after anchorage failure.

摘要

结合约束器的非线性，评估了具有不规则几何形状的锚固刚体的摇摆响应。执行参数分析，引入概率降低谱 ( PRS ) 的概念，以确定主要参数对摇摆响应的影响，作为基频（激励/主体）的函数。结果允许确定锚定系统更适合不同类型的激励的条件。限制器对于在脉冲运动（近源）下具有任何偏心率达到几何中心的细长物体具有更好的性能。对于来自远距离或中等深度源的地震激发，很明显PRS'锚固有效的带。与激发的类型无关，具有低和/或不对称质心的物体可能会在锚固失效后在突然的峰值强度下突然倾覆。