Deterministic and Stochastic Analysis of Seismic Response ofEquipment and Block-like Structures

9503766西班牙人这个项目进行了一项研究调查，采用了改进的模型，准确地描述了设备和其他块状结构系统的地震响应。本研究所采用的方法将块体与地基的影响视为一个连续的时间过程。该冲击模型反映了大多数重要的几何、力学和材料量的影响，如材料刚度、块长宽比、摩擦系数的值和结构的塑性行为。此外，还将发展基于通用离散单元法的多块系统分析和设计的新的数值方法。还将对块状结构在地震激励下的随机分析进行研究。在发展了拟议方法的理论和数值方面后，这些模型和分析将被应用于研究各种实用设备和历史遗迹结构的设计问题。***

9503766 Spanos This project conducts a research investigation featuring improved models which accurately describe the seismic response of equipment and of some other block-like structural systems. The approach undertaken in this study considers the impact of the block with the foundation as a continuous process of time. This impact model represents the influence of most of the important geometrical, mechanical, and material quantities such as material stiffness, block aspect ratio, value of the coefficient of friction, and the plastic behavior of the structure. Further, new numerical methods for analysis and design of multi-block systems based on versatile discrete element method will be developed. Stochastic analysis of block-like structures under earthquake excitations will also be carried out. Upon developing the theoretical and numerical aspects of the proposed methods, these models and the analyses will be applied to investigate the design problems of a variety of practical equipment and historical monuments structures. ***