Snapping-Cable Energy Dissipator (SCED) for Reducing Seismic Damage to Structures

用于减少结构地震损坏的折断电缆耗能器 (SCED)

• 批准号: 0114709
• 负责人: Raymond Plaut
• 金额: $ 25.86万
• 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: 2001
• 资助国家: 美国
• 起止时间: 2001-09-01 至 2006-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0114709&HistoricalAwards=false
• 关键词: Snapping; Cable; Energy; Dissipator; SCED

Abstract:This study examines energy loss mechanisms during the transition of a cable from a slack state to a taut state and undertakes optimization of the associated energy loss for use in design of low-tech/low cost/high performance dampers for mitigation of seismic damage in structures. Cables comprised of helical wires wound around a central core to form a strand or strands wrapped helically around another strand will be modeled to capture axial, flexural and torsional displacements. Dynamic friction at the contact points or lines between wires absorbs energy and affects the responses. Understanding these effects will enable design of a snapping cable energy dissipater that does not produce harmful shock to the structure, yet dissipates sufficient energy and/or adds sufficient stiffness to be effective in reducing damage induced by seismic events. It is anticipated that this analytical, numerical, and experimental research program leads to a novel and effective tool in the effort to protect lives and property during earthquakes and other natural or man-made hazards. Additionally, during the course of the research, techniques and results will be incorporated into courses cross-listed in Civil Engineering and Mechanics at Virginia Tech and the participation of undergraduate research students will be encouraged.

翻译后摘要：本研究探讨能量损失机制的电缆从松弛状态到拉紧状态的过渡过程中，并进行优化的低技术/低成本/高性能阻尼器的设计中使用的相关的能量损失，以减轻结构的地震破坏。将对由缠绕在中心芯周围以形成一股或多股螺旋缠绕在另一股周围的螺旋线组成的电缆进行建模，以捕获轴向、弯曲和扭转位移。 金属丝之间的接触点或接触线处的动态摩擦吸收能量并影响响应。 理解这些效应将使得能够设计不会对结构产生有害冲击的卡扣线缆能量耗散器，但耗散足够的能量和/或增加足够的刚度以有效地减少由地震事件引起的损坏。 预计这种分析，数值和实验研究计划将成为一种新颖有效的工具，以在地震和其他自然或人为灾害中保护生命和财产。 此外，在研究过程中，技术和结果将被纳入弗吉尼亚理工大学土木工程和力学交叉列出的课程，并鼓励本科研究生的参与。