scholarly journals ESTIMATION OF DEEP UNDERGROUND STRUCTURE IN SENDAI AREA BASED ON MICROTREMOR OBSERVATIONS AND STRONG-MOTION PREDICTON

2001 ◽  
Vol 7 (13) ◽  
pp. 53-56
Author(s):  
Masato MOTOSAKA ◽  
Hayato TOGOE ◽  
Tetsushi WATANABE
Keyword(s):  
Underground Structure ◽  
Strong Motion ◽  
Deep Underground ◽  
Deep Underground Structure

Dynamic Response of Deep Underground Structure under Explosion Seismic Wave

2011 ◽  
Vol 94-96 ◽  
pp. 298-305
Author(s):  
Hao Lu ◽  
Qi Cao ◽  
Rui Du ◽  
De Rong Wang
Keyword(s):  
Dynamic Response ◽  
Mechanical Model ◽  
Mechanical Response ◽  
Incident Angle ◽  
Underground Structure ◽  
Protective Structure ◽  
Box Structure ◽  
Deep Underground ◽  
Protection Engineering ◽  
Deep Underground Structure

The box structure is a typical underground protective structure, whose mechanical response to explosion seismic is of great interest in protection engineering. In this work, the rectangular force and combining dynamic and static methods have been employed to identify the mechanical behavior of deep underground structure under explosion seismic. The effects of ratio of side length, the incident angle, surrounding properties etc. were considered and the mechanical model which can describe the interaction between structure and soil was also developed. Finally, the dynamic response of box-type structure was analyzed.

scholarly journals Modification Research of the Internal Substructure Method for Seismic Wave Input in Deep Underground Structure-Soil Systems

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Xin Bao ◽  
Jingbo Liu ◽  
Dongyang Wang ◽  
Shutao Li ◽  
Fei Wang ◽  
...  
Keyword(s):  
Free Surface ◽  
Seismic Wave ◽  
Soil Structure ◽  
Underground Structure ◽  
Computational Effort ◽  
Seismic Loads ◽  
Underground Structures ◽  
Computational Accuracy ◽  
Substructure Method ◽  
Deep Underground

A new internal substructure method for seismic wave input in soil-structure systems was recently proposed. This method simplifies the calculation of equivalent input seismic loads and avoids the participation of artificial boundaries in the process of seismic wave input. However, in previous research and applications, the internal substructures are usually intercepted down from the free surface, which forms large substructures and increases the computational effort for data management on the substructure nodes, especially for deep underground structures. In this study, the internal substructure method is modified by intercepting the internal substructures entirely beneath the free surface and adjacently around the underground structures. Then, the equivalent input seismic loads are obtained through the dynamic analysis of the internal substructures and applied to the corresponding positions of the total soil-structure models. Thus, the earthquake energy can be more efficiently input into the region near the underground structures without losing computational accuracy. We provide the detailed implementation procedures of this modified method and validate its applicability and accuracy through the scattered problems of underground cavities in homogeneous and layered half-space sites.

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