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首页> 外文会议>World conference on earthquake engineering;WCEE >OVERTURNING OF ROCKING BLOCKS
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OVERTURNING OF ROCKING BLOCKS

机译：翻倒的石块

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Several previous studies have evaluated the likelihood that rigid blocks will overturn when subjected todynamic excitation. These previous results indicate a complex theoretical solution that bifurcatesdepending on the input motion and modeling of the block properties. In general, the studies are not readilyuseful for engineering purposes to evaluate the possibility of overturning of rocking blocks or rigidequipment during an earthquake. For the current study, we subjected a series of rigid blocks of differentsizes and aspect ratios to several recorded ground motions. The analysis of the blocks was done using theprogram Working Model, a program that analyzes rigid body motion of blocks and includes considerationof friction and the restitution characteristics between the blocks and the supporting surface. Our resultsshow that if the aspect ratio is held constant, overturning is strongly dependent on the size of the blocksand on the size and shape of the displacement response spectra. In general, objects with widths that arerelatively large compared to the displacement demand do not overturn independent of their height. Basedon results of the current study, some rules of thumb are provided that indicate the relative vulnerability tooverturning for different types of rigid blocks subjected to earthquake ground motion.
机译：先前的一些研究评估了刚性块在受到动态激励时会倾覆的可能性。这些先前的结果表明了一个复杂的理论解决方案，它取决于输入运动和块属性的建模而分叉。通常，这些研究不能轻易地用于工程目的，以评估地震发生时岩石块倾覆或刚性设备翻倒的可能性。对于当前的研究，我们对一系列不同大小和纵横比的刚性块进行了几次记录的地面运动。砌块的分析使用程序工作模型完成，该程序分析砌块的刚体运动，并考虑摩擦力以及砌块与支撑面之间的恢复特性。我们的结果表明，如果长宽比保持恒定，则倾覆高度取决于块的大小以及位移响应谱的大小和形状。通常，与位移需求相比宽度较大的物体不会随高度变化而倾覆。根据当前研究的结果，提供了一些经验法则，以表明不同类型的受地震地震动作用的刚性块体倾覆的相对脆弱性。

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