Coulomb Damping in the Design of Structures for Earthquake Induced Ground Motion

为了耗散结构中的振动能量，库仑阻尼或干摩擦是非常有效的方法。这种摩擦力还可以有效地用于控制地震时结构基础隔震装置的滑动。为了进一步扩展前人的研究，有必要研究更现实的多自由度结构在多分量激励下的双轴滑动和垂直加速度的影响。除了研究具有库仑阻尼的滑动基础的基础隔离效应外，研究允许楼板相对于支撑框架滑动的可能性也很有意义，其目的是耗散能量并隔离受支撑的二次系统。使用滑动地板隔离摩擦和耗散能量的想法是新颖和创新的。如果成功，这个概念可以提供一个可行的替代设计程序，以减少地震对结构的振动影响。本项目仅涵盖必要的分析研究，以充分了解具有滑动楼板的结构的地震反应特性。

To dissipate vibratory energy in structures the coulomb damping or dry friction can be very effectively used. The friction can also be effectively used to control sliding in the base isolation devices of a structure during earthquakes. To extend the earlier studies, the bi- axial sliding and the effect of vertical acceleration under multicomponent excitations of more realistic multi-degree-of-freedom structures are necessary. Besides the study of the base isolation effects of a sliding foundation with Coulomb damping, it is also of interest to study the possibility of permitting the floor slabs to slide relative to the supporting frame with the purpose of dissipating energy as well as isolating the supported secondary systems. The idea of friction isolation and energy dissipation by using sliding floors is new and innovative. If successful, the concept could provide a viable alternative design procedure to reduce the vibratory effects of earthquakes on structures. This project covers only the essential analytical studies necessary towards gaining a sufficient understanding to the seismic response characteristics of structures having sliding floor slabs.