摘要
为更加合理地计算基于位移的高桩码头抗震设计动力放大系数,采用40组地震动记录研究了双向水平地震作用下的码头动力放大系数。研究表明,码头的偏心距和分段长度以及地震波的入射角度对动力放大系数影响较大,地震动强度和近断层效应的影响可近似予以忽略。基于对动力放大系数计算结果的统计分析,提出了相应的计算公式,并确定了动力放大系数的变异系数和概率分布。
In order to determine the dynamic magnification factors（ DMF） for displacement-based seismic design method of pile-supported wharves more reasonablly,the factors for wharves under simultaneous excitation in orthogonal horizontal directions are investigated with 40 earthquake records. It is found that the eccentricity and segment length of wharf or angle of incidence of the ground motion play an important role on DMF,while the influence from intensity and near-fault effect of ground motion can be approximately ignored. Based on the statistical analyses of results for DMF,a new calculating equation is proposed,and the coefficient of variation and probability distribution for DMF are determined as well.
出处
《海洋工程》
CSCD
北大核心
2017年第4期59-68,共10页
The Ocean Engineering
基金
国家自然科学基金资助项目(51478077)
关键词
高桩码头
基于位移的抗震设计
动力放大系数
双向水平地震作用
扭转效应
非线性时程分析
pile-supported wharves
displacement-based seismic design
dynamic magnification factor（DMF）
bi-directional horizontal ground motion
torsional effect
nonlinear time history analyses
