Modeling stress-strain state bases of engineering constructions for evaluation of seismic hazard
Journal Title: Геодинаміка - Year 2016, Vol 20, Issue 1
Abstract
Purpose. The aim of this work was to evaluate changes in the transfer characteristics of the seismic environment with additional loading of massive engineering structures. This analysis will help to more accurately assess the characteristics of sedimentary layer in the study of the transfer characteristics of environment under the engineering structures already at the design stage of construction. Methodology. Frequency characteristic of environment was obtained by solving the direct dynamic seismic problem. To solve this problem and calculate the stress-strain state of the environment was used finite element method. The value of this method of mathematical modeling is the ability to make calculations for environments with complex geometrical structure and various inclusions. Setting a signal as close to the delta impulse, we receive environment response in the full possible frequency range of fluctuations in the models, without additional processing input and output signal. Results. Calculation of stress-strain state of the sedimentary layer under the large engineering structures was carried out. Wave field in the surrounding environment was modeled. Calculation of stress-strain state of the sedimentary layer and modeling of wave field for this environment was conducted for the three models: the first – the model of the sedimentary layer without engineering structures; the second and third model – the same environment with placed engineering structures with base of the foundation 46 m and 86 m, respectively. Transfer characteristics of sedimentary layer of the three models were calculated. The conducted simulation showed that the transfer characteristic of environment changes significantly depending on the load caused by buildings. Scientific innovation. Showed approach allows us to calculate the transfer characteristics of the sedimentary layer that will characterize the environment after the change of the stress-strain state, only using mathematical methods without making instrumental studies. Practical significance. This technique allows to evaluate the transfer characteristics of the seismic environment and its change at the design stage of complex structures and make necessary corrections already at this stage.
Authors and Affiliations
Yu. Starodub, B. Kuplovskyi, T. Brych, V. Prokopyshyn, O. Oleshchuk, Ye. Oleshchuk
Keywords
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- EP ID EP194444
- DOI 10.23939/jgd2016.01.162
- Views 92
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