基于位移的高桩码头抗震设计动力放大系数计算公式  

Dynamic magnification factor equation for displacement-based seismic design method of pile-supported wharves

作　　者：高树飞 贡金鑫[1] 冯云芬[2] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [2]聊城大学建筑工程学院,山东聊城252059

出　　处：《海洋工程》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)

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.

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 

分 类 号：U656.1[交通运输工程—港口、海岸及近海工程]