Experimental study of deformation processes in large-scale concrete structures under quasistatic loading

Шардаков, И. Н.; Glot, I.; Shestakov, A.; Tsvetkov, R. V.; Yepin, V.; Gusev, G.

doi:10.2140/jomms.2020.15.619

Cited by 3 publications

(1 citation statement)

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“…Нижняя часть колонн через специальные металлические захваты закреплена на фундаменте при помощи болтовых соединений. Модельная конструкция расположена на экспериментальном стенде ИМСС УрО РАН [35], который предназначен для выполнения экспериментов с крупномасштабными конструкциями. Стенд позволяет реализовывать внешние воздействия различного вида, от квазистатического до ударно-волнового, и дает возможность исследовать деформационные процессы от упругого состояния объекта до его полного разрушения.…”

Section: исследуемая конструкция и оборудованиеunclassified

Identification of the Impact Position in a Reinforced Concrete Structure Based on the Analysis of the Response of Vibration Sensors

Tsvetkov¹,

Шардаков²,

Glot³

et al. 2022

PNRPU Mechanics Bulletin

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The article presents the results of an experiment to study the vibration response of a large-scale reinforced concrete model structure to an impulse load. The load was a series of impacts along the normal to the surface of the element and was applied to all the main structural ele-ments (columns, crossbars and floor slabs). The vibration response was recorded by a system of sensors-accelerometers distributed over the structural elements and synchronized with the accelerometer mounted on the striker. The results of measurements of acceleration vibrograms were saved as digital files. An array of vibrograms recorded by the entire complex of sensors in response to test impacts on the main structural elements made up a vibration portrait of the structure. As a result of processing this information, an array of data was obtained on the propa-gation time of the vibration signal from each signal source to each of the sensors of the registra-tion system (basic array of responses).Key words: Impact localization, accelerometer, The data obtained were used to solve the problem of determining the location of an arbi-trary impact on a structure. To do this, the vibration response recorded by the sensor system during an arbitrary impact was compared with the base array of responses. The comparison was made on the basis of the calculation of the pair correlation coefficients. The resulting spatial distribution of the correlation coefficients made it possible to identify the position of the shock load application. It corresponds to the structural element that has the maximum value of the correlation coefficient. The proposed algorithm was demonstrated on an example where one of the test shocks that participated in the FORMATION of the basic vibration portrait was used as an unknown load. In a numerical experiment using the proposed algorithm, it was found that the accuracy of the impact site identification corresponds to the characteristic step of the structural elements. It is shown that the accuracy correlates with the number of sensors of the registration system and their distribution throughout the structure. The developed algorithm for identifying the place of impact load application can be effec-tively used in the development of automated systems for deformation monitoring.

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Section: исследуемая конструкция и оборудованиеunclassified