远海岛礁与场地地震反应研究现状  

Review of seismic response of offshore reef and site

作　　者：刘书序 胡进军[1,2] LIU Shuxu;HU Jinjun(Key Laboratory of Earthquak Engineering and Engineering Vibration.Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China;Key Laboratory of Earthquake Disaster,Mitigation of Emergency Management,Harbin 150080,China)

机构地区：[1]中国地震局工程力学研究所,地震工程与工程振动重点实验室,黑龙江哈尔滨150080 [2]地震灾害防治应急管理部重点实验室,黑龙江哈尔滨150080

出　　处：《世界地震工程》2024年第2期136-147,共12页World Earthquake Engineering

基　　金：国家重点研发计划(2021YFC3100701,2022YFC3003503);国家自然科学基金(52078470)。

摘　　要：本文从岛礁地质构造、岛礁地震反应数值模拟方法和岛礁场地效应等方面总结了海域岛礁地震反应的研究现状,对比并且分析了海域岛礁数值模拟方法中的流固耦合模拟方法、固体边界模拟方法和地震动输入方法;总结了现有海域岛礁地震反应的场地效应相关的研究成果。相关研究表明:海水对岛礁场地的放大系数有明显影响,岛礁表面砂层对水平向地震动加速度峰值放大显著,随着输入地震动峰值的增大,岛礁场地的PGA放大效应趋于减小;海域岛礁场地对中低频段的地震动反应较为显著,加速度峰值放大系数一般介于1.5到4.0之间。为满足岛礁工程的抗震设计,需要进一步解决岛礁工程合理地震动输入、岛礁场地地震反应规律与岛礁工程的设计地震动参数等关键科学问题。In order to understand the research status of seismic response of offshore reef and site,this paper summarizes the research status of seismic response of offshore reef from the aspects of geological structure of reef,numerical simulation methods of seismic response of reef,and site effects of reef,and compares and analyzes the fluid-structure interaction simulation method,solid boundary simulation method and ground motion input method in the numerical simulation methods of offshore reef.The research results related to the site effect of seismic response of reef in the existing sea area were analyzed.The results show that seawater has a significant impact on the amplification coefficient of the island and reef sites.The amplification effect of PGA on the surface of the reef tends to decrease with the increase of the peak ground acceleration.The response of reef to ground motions in the middle and low frequency bands is more significant,and the peak amplification coefficient of acceleration is generally between 1.5 and 4.0.In order to meet the seismic design of island and reef engineering,it is necessary to further solve the key scientific problems such as the reasonable ground motion input of island and reef engineering,the seismic response law of island and reef sites,and the design ground motion parameters of island and reef engineering.

关 键 词：远海岛礁 地震反应 数值模拟 场地效应 设计地震动 

分 类 号：P315.9[天文地球—地震学]