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

地震引起的地面运动结构设计中的库仑阻尼

• 批准号: 8619306
• 负责人: Mahendra Singh
• 金额: $ 3.54万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-05-01 至 1988-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8619306&HistoricalAwards=false
• 关键词: Coulomb; Damping; Design; Structures; Earthquake

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.

为了耗散结构中的振动能量，可以非常有效地使用库仑阻尼器或干摩擦。这种摩擦力还可以有效地控制结构的基础隔震装置在地震时的滑动。为了扩展以前的研究，需要考虑多自由度结构在多分量激励下的双向滑动和竖向加速度效应。除了研究具有库仑阻尼的滑移基础的隔震效果外，还需要研究允许楼板相对于支承框架滑动的可能性，以达到耗能和隔震支承二次系统的目的。滑移楼板摩擦隔震消能的设计思路新颖，具有创新性。如果成功，这一概念可以提供一种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征。