Seismic Design of RCS Frame Connections for Repairable Damage

可修复损伤 RCS 框架连接的抗震设计

• 批准号: 9710204
• 负责人: James Wight
• 金额: $ 16.91万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-07-15 至 2000-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9710204&HistoricalAwards=false
• 关键词: Seismic; Design; RCS; Frame; Connections

9710204 Wight The research project will investigate the seismic response of exterior frame connections in composite (steel-concrete) structures, with emphasis on defining a "repairable damage" limit state and investigating the effectiveness of standard repair methods for composite connections. Currently such connection subassemblies are being subjected to reversed cyclic loading of increasing displacement magnitudes, eventually reaching displacement levels corresponding to approximately 5% interstory drift. This degree of interstory drift is beyond the "life safety" limit state and approximately at the "collapse prevention" limit state. Approximately four of the six specimens for repair will be retested and two additional RCS exterior connections with designs similar to two of the original specimens will be constructed for retesting. These specimens will be subjected to reversed cyclic loading to increasing displacements, stopping the testing at interstory drift level should be below the "life safety" limit state, but beyond the "immediate occupancy" limit state. Post-test analytical studies will be used to simulate the measured RCS connection behavior during both its original and repaired behavior. The degree of stiffness and strength retention, and amount of energy dissipation capacity at various interstory drift levels, will be compared between all specimens, with special emphasis on the comparison of the results for the same connection in its "original" and "repaired" conditions. Analytical models will be developed for use in trial designs of RCS frames structures. The analytical modeling and trial designs will be coordinated with current U.S. research projects on RCS frames at other U.S. universities and Japanese research institutions. This is a project supported under the NSF initiative No. 94-154 "Composite and Hybrid Structures". ***

9710204 Wight该研究项目将调查组合（钢-混凝土）结构中外部框架连接的地震响应，重点是定义“可修复损坏”极限状态，并调查组合连接标准修复方法的有效性。 目前，这种连接结构正承受着不断增加的位移量的反向循环荷载，最终达到相当于约5%层间位移的位移水平。 这种层间位移程度超过了“生命安全”极限状态，接近于“防倒塌”极限状态。 将对六个待修复样本中的大约四个样本进行重新测试，并将建造两个设计与两个原始样本相似的附加RCS外部连接件进行重新测试。 这些试件将承受反向循环荷载，以增加位移，在层间位移水平应低于“生命安全”极限状态但超过“立即占用”极限状态时停止测试。 试验后分析研究将用于模拟测量的RCS连接在其原始和修复行为期间的行为。 刚度和强度保持的程度，以及各种层间位移水平的能量耗散能力，将在所有样本之间进行比较，特别强调在其“原始”和“修复”条件下相同连接的结果的比较。 将开发分析模型，用于RCS框架结构的试验设计。 分析建模和试验设计将与美国其他大学和日本研究机构目前关于RCS框架的研究项目相协调。 这是NSF第94-154号倡议“复合材料和混合结构”支持的一个项目。 ***