Master Degree / Yüksek Lisans Tezleri

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Author: search.filters.author.Valizadeh, HadiSubject: search.filters.subject.Numerical analysis

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  • Master Thesis
    Investigation on the Liquefaction Potential of Sand-Granulated Rubber Mixture That Used Around the Buried Pipes: Numerical Modeling and Developing
    (01. Izmir Institute of Technology, 2021) Valizadeh, Hadi; Ecemiş Zeren, Nurhan
    Recently, the sand-granulated rubber mixture has been reported as a new soil improvement method that can be applied as a liquefaction mitigation filling material around the buried pipes. This study performed numerical modeling of liquefaction potential of tire-derived granulated rubber–sand mixture used around the buried pipes by the FLAC 2D software. The effects of pipe size, burial depth, and shaking intensity on the pipe uplift and the liquefaction potential of the sand-tire derived granulated rubber mixture placed around the buried pipes were investigated using the finite difference method. Furthermore, UBCSAND advanced soil constitutive model was used for liquefaction analysis. First, the result of 1-g shaking table tests was utilized for the verification of the numerical analysis. Comparing the numerical results and the experimental measurements showed that the numerical simulation using the UBCSAND constitutive model could accurately estimate the liquefaction-induced uplift of the buried pipes as well as the related failure. Then, a parametric study was conducted to investigate the effects of the pipe diameter, pipe depth, and the maximum acceleration on pipe uplift and liquefaction potential when the sand-granulated rubber mixture was placed as the filling material. Eventually, an analytical formula was proposed to estimate the liquefaction-induced uplift of buried pipes, and the soil failure mode was categorized according to the pipe's burial depth.