Analytical and Experimental Analysis of the Use of Wide Beam Frames in Active Seismic Zones

宽梁框架在地震活动区的应用分析与实验

• 批准号: 9526326
• 负责人: James Wight
• 金额: $ 12.24万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-10-01 至 1999-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9526326&HistoricalAwards=false
• 关键词: Analytical; Experimental; Analysis; Use; Wide

Moment resisting R/C frames if properly designed and detailed they are very ductile systems capable of enduring the most severe earthquake input motions. There has been a substantial number of investigations of R/C beam to column connections, but at least one common connection problem has not been adequately researched, namely, connections in frame systems composed of wide shallow beams and `normal` columns. Over the last decade they have also been used to a limited extent in regions of moderate to high seismic risk. Due to the lack of experimental studies for these frame systems, conflicting design recommendations have been developed. Because wide beam connections are not uncommon in concrete frame construction, and because there is a lack of information on the behavior and resulting seismic response of concrete frames that contain such connections, there is a clear need for a well planned analytical and experimental investigation of reinforced concrete frames that contain such connections. The goal of this research project is to combine prior experimental results with a limited number of new test results to generate analytical models for simulating the seismic response of wide beam frame structures. Then, combine the analytical and experimental studies to develop detailing requirements as well as recommendations for the proper use of wide beam frames, i.e., in what seismic zones, for what number of stories and in combination with what other lateral load resisting systems. This study will draw conclusive understanding to the seismic behavior of reinforce concrete frame with wide beam connections through laboratory experiments and finite element analysis and the results could form the basis for updating seismic design provisions for such connections.

抗弯矩钢筋混凝土框架，如果设计合理和详细，它们是非常延性的系统，能够承受最严重的地震输入运动。关于钢筋混凝土梁柱连接的研究已有很多，但至少有一个常见的连接问题还没有得到充分的研究，即由宽扁梁和普通柱组成的框架体系中的连接。在过去的十年里，它们也在中等到高地震风险的地区得到了有限的使用。由于缺乏对这些框架系统的实验研究，提出了相互矛盾的设计建议。由于宽梁连接在混凝土框架结构中并不少见，而且由于缺乏关于包含此类连接的混凝土框架的性能和由此产生的地震反应的信息，因此显然需要对包含此类连接的钢筋混凝土框架进行精心规划的分析和试验研究。该研究项目的目标是将已有的试验结果与有限数量的新试验结果相结合，生成用于模拟宽梁框架结构地震反应的分析模型。然后，将分析和试验研究相结合，以制定详细的要求以及适当使用宽梁框架的建议，即在哪些地震区、多少层数以及与哪些其他抗侧向荷载体系相结合。通过室内试验和有限元分析，对钢筋混凝土宽梁连接框架的抗震性能有了较为明确的认识，为修订宽梁连接的抗震设计规定奠定了基础。