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  2019,Vol.14no.2 ,page:328-340

Numerical Modeling Techniques of Rayleigh Wave Field and Its Application
Abstract:      Four different approaches about numerical modeling techniques of Rayleigh wave field were summarized. The techniques base on vertical harmonic point load on the free surface has been proposed in this paper. The main research achievements of Lamb issues, such as the characteristics of Rayleigh wave field under point load and its main influencing factors were discussed. On this basis the numerical modeling of Rayleigh wave field with Plaxis 2D was conducted and the effectiveness of the approach was verified with an example. The dynamic response of a multi-story building structure during propagation of Rayleigh wave was analyzed using the proposed method, and the results were compared to that from the traditional methods. Numerical analysis results show that different wave motion input methods have great effect on the dynamic response of building structures. The vibration shape and failure modes of the structure were greatly influenced by seismic input modes.
Author NameAffiliation
Bai Jianfang School of Civil Engineering, Shijiazhuang Railway University, Shijiazhuang 050043, China 
Ma Lilong School of Civil Engineering, Shijiazhuang Railway University, Shijiazhuang 050043, China 
Keywords:    Rayleigh wave  Lamb issues  Plaxis 2D software  Numerical modeling  Wave motion input  Multi-story building
Received on:  July 23, 2018
Rayleigh波场的数值模拟及其应用
摘要:    本文总结了Rayleigh波场数值模拟的4种思路和各自特点,根据Lamb问题的理论分析成果提出了基于地表激振的Rayleigh波场数值模拟技术,论述了地表集中震源作用下引起地表波动场的特点及主要影响因素。在此基础上,利用Plaxis 2D有限元软件实现了Rayleigh波场的数值模拟,并结合算例验证了所提方法的可行性和结果的合理性。最后,针对多层建筑结构,研究了不同地震动输入模式下结构动力反应的特点。结果表明,Rayleigh波作用下结构的动力反应特性明显区别于在底部输入剪切波时的结果,不同地震动输入模式对结构的振动形态和破坏模式有着明显的影响。
关  键  词:Rayleigh波  Lamb问题  Plaxis 2D软件  数值模拟  地震动输入  多层结构
基金项目:河北省大型基础设施防灾减灾协同创新中心项目,河北省重点学科建设项目(桥梁与隧道工程)
作者简介:白建方,男,生于1976年。讲师。主要从事工程系统抗震方面的研究。E-mail:bjf2004@126.com
引用本文格式:白建方,马立龙.Rayleigh波场的数值模拟及其应用[J].震灾防御技术英文版,2019,14(2):328-340  DOI:10.11899/zzfy20190207
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