Effect of Tunnel and Building Interaction on the Seismic Response of Building by Numerical Modeling

Document Type : Research Article


1 Geotechnical MSc Student, Yasouj University, Department of Civil Engineering, Yasouj, Iran

2 Engineering Faculty, Yasouj University, Yasuj, Iran

3 Assistant Professor, PhD in Geotechnical Engineering, Yasouj University,Yasouj, Iran

4 Assistant Professor, PhD in Structural Engineering, Yasouj University, Yasouj, Iran


In building design codes, no attention has been paid to the interaction effect of underground structures and building, which can change the amount of applied forces on the building. In the present study, by using numerical modeling with FLAC 2D software, the effect of tunnel and building interaction on the seismic response of building stories has been investigated in order to have more accurate assessments of seismic forces on the building when we want to design it. In this study, the model was first stimulated in the case of the presence of building alone (SF model) by harmonic shear SV waves and the real earthquake waves. Then, by adding a tunnel to the model (STF model), the system was analyzed. By comparing the result of the maximum acceleration of buildings floors in the case of STF to the SF model, the effect of tunnel and building interaction on stories acceleration have been investigated. In low frequencies, the negative effect of the tunnel on the acceleration response of the building stories was observed. In high frequencies, the positive effect of the tunnel on the acceleration of the stories was observed. It was also concluded that the harmonic waves with the frequency equal to the dominant frequency of the real motions applied to the models, have created more amplification in the acceleration response of buildings.


Main Subjects

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