地震工程学报2018，Vol.40Issue(2)：335-343,9.DOI:10.3969/j.issn.1000-0844.2018.02.335
SH波在地裂缝界面处的传播规律
Propagation Law of SH-wave Across Ground Fissure Interface
摘要
Abstract
It is important to study seismic wave propagation through fractures in the field of earth-quake engineering.Based on elasticity mechanics and wave motion theories,the propagation law of an anti-plane SH-wave across a ground fissure interface is analyzed using time-domain and fre-quency-domain calculation methods in this paper.Recursion equations are established and a con-trast verification between the two methods is conducted.The influence of certain related parame-ters on the propagation law of anti-plane SH-waves are discussed,including the equivalent shear stiffness of the ground fissure interface,incidence wave frequency,incident angle,and shear strength of the fissure surface.Furthermore,a cross-comparison of these parameters is per-formed,and recursion equations considering the shear strength of fissure are established.Results indicate that the transmission coefficient increases with an increase in equivalent shear stiffness and the incident angle,but decreases with an increase in incident frequency.In addition,the low-pass filtering effect of the ground fissure interface is more evident with a decrease in equivalent shear stiffness and the incident angle.Under the input of a real seismic wave,there is a decrease of transmission coefficient but no obvious decrease in the amplitude of the transmission wave. However,the waveform change is obvious.The amplitude and wave form of the reflection wave gradually approach the incident wave,but the effect of hysteresis occurs in the phase relative to incident wave.To obtain an effective and real propagation law of wave motion,fluctuation time-history data were processed using linear interpolation,and results indicate that there are no chan-ges to the precision of calculation results using this method.关键词
SH波/地裂缝/透反射系数/剪切滑移/波动理论Key words
SH-wave/ground fissure/transmission and reflection coefficient/shear slip/wave motion theory分类
建筑与水利引用本文复制引用
王雷,王瑞,胡志平,柴少波,王启耀..SH波在地裂缝界面处的传播规律[J].地震工程学报,2018,40(2):335-343,9.基金项目
国家自然科学基金项目(41072221) （41072221）
陕西省自然科学基金项目(2016JM4013) （2016JM4013）
长安大学中央高校基本科研业务费专项资金资助(310828163409) （310828163409）
