消散
可用性(结构)
阻尼器
结构工程
工作(物理)
流离失所(心理学)
挤压
计算机科学
优化设计
机械工程
材料科学
工程类
复合材料
物理
热力学
机器学习
心理治疗师
心理学
作者
Geoffrey W. Rodgers,J. Geoffrey Chase,John B. Mander,Nicholas C. Leach,Caleb S. Denmead
出处
期刊:Bulletin of the New Zealand Society for Earthquake Engineering
[New Zealand Society for Earthquake Engineering]
日期:2007-06-30
卷期号:40 (2): 35-48
被引量:39
标识
DOI:10.5459/bnzsee.40.2.35-48
摘要
Supplemental dampers are a means of repeatedly dissipating energy without damage to the underlying structure, increasing life-safety and helping provide better serviceability of structures following a major earthquake. High performance (small size) lead dampers are designed and tested to characterise their force-displacement behaviour and produce trade-off curves relating device geometry to force capacity, to parameterise the design space to enable further devices to be designed for structural applications. Peak forces of 120-350 kN were obtained for devices that were all able to fit within standard structural connections. Results show that prestressing the working material is critical to obtain optimal energy dissipation. Although previously characterised as extrusion dampers it is shown that classical extrusion modelling formulations do not strictly work well for this class of damper. Instead a coulomb type of stress-based model is proposed, with relationships presented that are independent of device scale. Empirical reduction factor equations are applied to the New Zealand Structural Design Actions to enable lead extrusion devices to be incorporated into structural design analyses. The overall results indicate that repeatable, optimal energy dissipation can be obtained in a compact device to minimise damage to critical buildings and infrastructure.
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