Alternative Details for Steel Beam-To-Column Connections

钢梁与柱连接的替代细节

• 批准号: 9501449
• 负责人: Stephen Schneider
• 金额: $ 23.03万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-06-01 至 2001-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9501449&HistoricalAwards=false
• 关键词: Alternative; Details; Steel; Beam; Column

9501449 Schneider This is a career award for young engineering investigators.The object of this project is to develop practical and economical alternative details for the fully welded and the partially- constrained moment-resisting connection. Clearly, from the observed performance of steel connections during the Northridge earthquake, it is essential to provide ductility for the bottom flange. Therefore, this research proposes several viable connection alternatives to be investigated analytically and experimentally. Results from the one-year Northridge research program will be used to determine appropriate prototype frames and appropriate structural steel sizes for testing. The primary focus of the research is the experimental performance of alternate details for steel beam-to column connections. A series of large-to full-scale near-real-time cyclic deformation tests will be performed on tee-shaped beam-column specimens using a 110 kip hydraulic actuator to deform the tip of the cantilevered beam. Deformations will be imposed at approximately the same frequency as a beam-to column joint might experience during the seismic vibration of a structural frame. Also a series of earthquake simulator tests will be conducted to investigate true dynamic behavior of the joints. Results from this research will have a great impact within the earthquake engineering comity. The near-real time full-scale tests will begin to resolve some of the differences between joint damage noted after the Northridge earthquake and typical joint performance observed in the laboratory. Connection alternatives will be tested in an effort to improve the ductility of the connection, and relieve some of the high stress concentrations associated with the highly confined region of the joint. ***

9501449 Schneider这是一个面向年轻工程研究人员的职业奖。该项目的目标是为全焊接和部分约束的抗弯矩连接开发实用且经济的替代细节。 显然，从北岭地震期间观察到的钢连接性能来看，为底部翼缘提供延性至关重要。 因此，本研究提出了几个可行的连接方案进行分析和实验研究。 为期一年的北岭研究计划的结果将用于确定适当的原型框架和适当的结构钢尺寸以进行测试。 研究的主要焦点是钢梁柱连接的替代细节的实验性能。 将使用110 kip液压致动器对T形梁柱样本进行一系列大规模至全尺寸的近实时循环变形试验，以使悬臂梁尖端变形。 在结构框架的地震振动期间，变形将以与梁柱接头可能经历的频率大致相同的频率施加。 此外，还将进行一系列地震模拟器试验，以研究节点的真实动力性能。 本研究成果将对地震工程界产生重大影响。 近实时全尺寸试验将开始，以解决北岭地震后发现的接缝损坏与实验室中观察到的典型接缝性能之间的一些差异。 将对连接替代方案进行测试，以提高连接的延展性，并缓解与接头高度受限区域相关的一些高应力集中。 ***