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Information Journal Paper

Title

Effect of frequency content of seismic source load on Rayleigh and P waves in soil media with cavity

Pages

  280-300

Abstract

 Knowledge of subsurface characteristics has always been of interest to Geotechnical and geological engineers, especially when there is a potential risk of occurrence of subsurface anomalies such as a Cavity and sinkhole. Identification of these anomalies are become more difficult at higher depths due to the reduced resolution and accuracy of recorded data. It is therefore essential to evaluate the results of both Rayleigh (R) and longitudinal (P) waves, especially for Cavity in high depth. In this paper, it is attempted to investigate the ability of R and P waves to detect cavities in different depths of soil media. Also, with regard to the effects of Frequency content of Source load on Wave field domain, various types of Source load such as Ricker wavelet with central frequency of 100, 50 and 20 Hz, hammer impact and short-time impact are used. The results show that the Frequency content and predominant frequency of Source load have a significant effects on penetration depth and Wave field resolution. Furthermore, filtering methods and separating the R and P waves could be much helpful to identify cavities in shallow and high depth by considering the Wave field of the R and P waves, respectively. Hence, based on the Finite Element Modeling results, most of the Source load have a good, moderate and week influence on the wave filed of soil models with Cavity at depth of 2, 6 and 10 meters, respectively. Also, in case of a soil model with Cavity at depth of 20 meters, P-wave has a better resolution compared to R-wave which is almost indiscernible. Generally, it could be represent that the Wave field of P-wave must be considered when the depth of the Cavity is increased.

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    APA: Copy

    Rahnema, Hossein, & Mirassi, Sohrab. (2021). Effect of frequency content of seismic source load on Rayleigh and P waves in soil media with cavity. JOURNAL OF STRUCTURAL AND CONSTRUCTION ENGINEERING, 8(2 ), 280-300. SID. https://sid.ir/paper/405912/en

    Vancouver: Copy

    Rahnema Hossein, Mirassi Sohrab. Effect of frequency content of seismic source load on Rayleigh and P waves in soil media with cavity. JOURNAL OF STRUCTURAL AND CONSTRUCTION ENGINEERING[Internet]. 2021;8(2 ):280-300. Available from: https://sid.ir/paper/405912/en

    IEEE: Copy

    Hossein Rahnema, and Sohrab Mirassi, “Effect of frequency content of seismic source load on Rayleigh and P waves in soil media with cavity,” JOURNAL OF STRUCTURAL AND CONSTRUCTION ENGINEERING, vol. 8, no. 2 , pp. 280–300, 2021, [Online]. Available: https://sid.ir/paper/405912/en

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