Saeed Mojtabazadeh (born 1992), Iranian researcher, civil engineer

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Saeed Mojtabazadeh

mojtabazadeh.blogfa.com

Ph.D. Candidate in Geotechnical Earthquake Engineering

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Saeed Mojtabazadeh Edit Profile

سعید مجتبی زاده

Background

Saeed was born in 1992, in the Islamic Republic of Iran.

Education

Ph.D. Candidate in Geotechnical Earthquake Engineering

Career

Research and teaching assistant at Islamic Azad University of Zanjan, Iran.

Works

Membership

Iranian Geotechnical Society , Islamic Republic of Iran
Iranian Hydraulic Association , Islamic Republic of Iran

Interests

Guitar, Jogging, Computer games, Computer technologies and advanced assembling, Digital communications, Digital image processing, The coalition's Gears of War

References

Researchgate
Personal blog
A half-plane time-domain BEM for SH-wave scattering by a subsurface inclusion A direct time-domain numerical approach named the half-plane boundary element method is proposed based on the half-space Green's functions for seismic analysis of a homogeneous linear elastic half-plane in presence of arbitrarily shaped subsurface inclusions, subjected to propagating obliquely incident SH-waves. It is assumed that inclusion is completely connected to the surrounding domain. In the use of the method, only the interfaces need to be discretized to create the model. First, the problem is decomposed into two parts including a pitted half-plane and a closed filled solid. Then, the influence coefficients of the matrices are obtained by applying the method to each part. By satisfying the boundary/continuity conditions on the interfaces, a coupled equation is finally formed to determine unknown boundary values in each time-step. After implementing the method in an advanced developed algorithm, its efficiency is investigated by solving some practical examples and compared with those of the published works. The results show that the proposed method has an appropriate accuracy for analyzing seismic inclusion problems. To complete the results, the synthetic seismograms of the surface are presented for circular/elliptical subsurface inclusions. Then, three-dimensional amplification patterns are illustrated for some specific cases. The method can be recommended to geotechnical/mechanical engineers for transient analysis of different topographic features, seismic isolation and composite materials.
2020
Seismic amplification pattern of the ground surface in presence of twin unlined circular tunnels subjected to SH-waves (In Persian). In this paper, the amplification pattern of the ground surface is presented in presence of twin unlined circular tunnels subjected to SH-waves. To analyze the assumed seismic model, a half plane time-domain Boundary Element Method (BEM) was used which has been previously developed for single sub-surface tunnels. First, after presenting a brief formulation of the proposed method and displaying a verification example, the sensitivity analysis was carried out to obtain the seismic amplification pattern of the ground surface by considering the key parameters including tunnels buried depth, interval distance, incident wave angle and response frequency. Finally, by collecting the maximum amplification of different scenarios and applying linear fit on the obtained values, the results were summarized as series of linear equations and tables. The results showed that different situations of buried twin tunnels in urban fabric was very effective on the seismic response of surface. The results of this research can be used to completing and increasing the accuracy of existing codes around the subject of ground surface zonation in presence of twin tunnels.
2019

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Saeed Mojtabazadeh

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Saeed Mojtabazadeh Edit Profile

Background

Education

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Born

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Education

2011 - 2014

2014 - 2016

2016 - 2020

Awards

The top-ranked Ph.D. Candidate researcher in department of Civil Engineering., Zanjan