摘要
目的采用提取地震动反应谱特征参数建立基于地震动反应谱特性的数据库,为结构地震反应分析提供有效便捷的地震动输入选取方式.方法根据常见的4种形式反应谱,以误差最小原则搜索最佳的反应谱特征参数,并通过选取不同的结构形式,明确结构反应与地震动输入之间的关系.结果地震动输入对结构响应的影响是十分明显的,相同的结构在不同的地震动作用下或不同的结构在相同的地震作用下的响应将体现出不同的性态,结构物的反应可以相差平均约2倍左右.结论考虑0～20 km(近震)和50～130 km(远震)的影响,地震记录按照特征周期划分组别,对地震动时程进行结构抗震分析,能够体现出结构的最不利反应状态,有利于制定合理的结构抗震措施.
Selection of strong ground motion input is one of the main parts in structural aseismic analysis, which has been worried by engineers and designers for a long time. The parameter of response spectral corner frequency, which is established and included in our new strong ground motion database based on four types of response models, is taken as the main reference in selecting accelerogram for analyzing structural response by considering structural inherent frequency. The results indicate that strong ground motions, including near site events within 0 -20 km and far site events with in 50-130 km, could make same structure show different response characters, the larger structural performance could be easily represented by selecting accelerograms having the same or similar frequency from our new database directly with structural inherent frequency, and then further aseismic procedures could be taken once structure is in dangerous situation.
出处
《沈阳建筑大学学报（自然科学版）》
CAS
北大核心
2012年第1期15-22,共8页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金委创新研究群体基金项目(51121005)
高等学校博士学科点专项科研基金课题(20100041110003)
关键词
地震动
反应谱
拐点周期
时程分析
结构响应
strong ground motion
response spectra
comer frequency
time - history analysis
structural response
