摘要
基于国内外抗震规范及相关文献关于阻尼修正系数(DMF)的研究,将成果进行分组并讨论其存在的优缺点及影响DMF的因素。研究表明:谱周期相关模型适合调整各国规范且方便应用于工程实践,而含地震动特性模型具有更好的预测性,是今后的研究方向;DMF受阻尼比、谱周期、震级、震源距离、场地类别、持续时间和断层机制等因素的影响,且和地震动数据库特征密切相关;建立合理的DMF模型要求地震动记录的数量更为丰富、地震动信息更为准确。最后借助固定效应模型和随机效应模型给出了一种用于解决DMF的方法,可以为我国建立DMF模型提供借鉴。
Based on the research on the damping correction factor(DMF)model in domestic and foreign seismic codes and related documents,the results are grouped and their advantages or disadvantages and influencing factors are discussed.It is found that spectral-period-dependent DMF models is suitable for adjusting national codes and is convenient for application in engineering practice,while the final group has better predictability and is the future research direction;DMF is greatly influenced of damping ratio,spectral period,magnitude,source distance,site category,duration,fault mechanism and other factors,and are closely related to the characteristics of the ground motion database.Finally,with the help of fixed effect model and random effect model,a method for solving DMF is given,which can provide reference for establishing DMF model in China.
作者
刘名吉
LIU Mingji(Institute of Engineering Mechanics,China Earthquake Admistration,Key Laboratory of Earthquake Engineering and Engineering Vibration of China Earthquake Administration,Harbin 150080,China;School of Civil Engineering,Shandong Jianzhu University,Jinan 250000,China)
出处
《地震工程与工程振动》
CSCD
北大核心
2021年第6期124-133,共10页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金项目(52078470,U1939210,51578516)。
关键词
阻尼修正系数
影响因素
随机效应模型
固定效应模型
浅壳与上地幔地震
damping modification factor
influencing factors
the random effects model
the fixed effect model
shallow crustal and the upper mantle earthquakes
