Some principles of generating seismic input for calculating structures

Uzdin, A. M.; Prokopovich, Sergei

doi:10.1051/e3sconf/202015706021

Cited by 7 publications

(6 citation statements)

References 18 publications

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“…Moscow, Standart in form Publ., 2017 27 p.) PGA=7 m/s 2 . The issue has been discussed in literature [8,12,14] in detail, and as a result of this discussion, it can be unequivocally stated that PGA cannot characterize the earthquake intensity. The 9-point degree earthquake in Mexico City had the PGA of about 1.8 m/s 2 , and the one in Tabas (Iran) about 9 m/s 2 .…”

Section: The Essence Of the Rsmmentioning

confidence: 78%

“…Despite possible inaccuracies in estimating seismic resistance by the RSM, especially for the ULS and the CLS, the authors consider these estimates to be more informative for the designer, than modern dynamic calculations based on earthquake accelerograms. This is due to the low quality of setting design accelerograms, which is widely discussed in the literature [8,[12][13][14]. Calculating using a single accelerogram is the only implementation of a random process which can disorient the designer.…”

Section: Discussionmentioning

confidence: 99%

“…And for this some energy is necessary, but not peak acceleration. Therefore, only the energy characteristics, such as Arias intensity, absolute cumulative velocity and others, can act as an instrumental characteristic of an earthquake [14][15][16][17][18] ] succeed in to solving the problem of setting PGA for a given earthquake intensity in microseismic scale due to considering a limited range of accelerogram periods of 0.3-0.5 s. In this range of periods, a 9-degree seismic action corresponds to PGA=7 m/s 2 , which was mentioned above.…”

Section: The Essence Of the Rsmmentioning

confidence: 99%

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Reasponse-spectra method for assessing seismic resistance of structures possibilities and prospects of usage

Benin,

Zhemchugov-Gitman,

Kurbanov

et al. 2023

E3S Web Conf.

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The issues of using the response-spectra method for calculating the seismic resistance of structures are considered. The physical meaning of the coefficients included in the normative calculation formulas of the response-spectra technique is analyzed, ways of refining these coefficients are indicated. In particular, the dependence of the peak ground acceleration on the design accelerogram period is noted. The issue of obtaining the displacement spectra on the base of the normative spectral curve is considered. It is noted that with the correct setting of the normative coefficients, calculation by the response-spectra method gives more reliable values of the calculated factors. Dynamic calculating of structures over time are only needed for substantially non-linear systems and, possibly, heavily damped systems with non-uniform damping. Single calculation of the structure according to an accelerogram only disorientate the designer. The refined version of the linear spectral technique presented in the paper should be considered as the main method for assessing the seismic resistance of buildings and structures.

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Section: The Essence Of the Rsmmentioning

confidence: 78%

Section: Discussionmentioning

confidence: 99%

Section: The Essence Of the Rsmmentioning

confidence: 99%

See 1 more Smart Citation

Reasponse-spectra method for assessing seismic resistance of structures possibilities and prospects of usage

Benin,

Zhemchugov-Gitman,

Kurbanov

et al. 2023

E3S Web Conf.

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“…Колебательный процесс изучаемого объекта имеет пространственный характер перемещений. С целью получения полного вектора колебаний в точке (вибропортрета), необходимо измерять три базисных отведения в контрольной точке объекта, для чего используется специальное оборудование, представляющее собой виброизмерительный комплекс [10,11].…”

Section: моделирование технического состояния шпилечного подвесаunclassified

Technical diagnostics of heembedded elements of crane tracks of lifting equipment in machine halls of tunnel escalators

Vatulin

Popov²,

Dyatlov³

2023

Izvestiya MGTU MAMI

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BACKGROUND: During the operation of crane beams of lifting equipment of subway tunnel escalators machine halls, the information about the technical condition of certain structural elements of supporting metal framework is always relevant, which determines the possibility of their further safe use and the need for repair and restoration work. The value of the remained service life is estimated by comparing the actual load-carrying ability with the criteria corresponding to the limiting conditions according to the project documentation. The actual state of the supporting framework elements can change with time significantly, therefore, the assessment of the remained service life is carried out with an experiment-and-simulation method based on the determination of stresses and their maximum deviations in weakest sections of framework elements with the determination of the degree of their impact on durability in the long term. AIMS: Analysis of the combined application of methods for modeling the stress-strain state with subsequent wavelet analysis of wave processes in the interlocked stud-bolts of the suspension unit of riding beams of lifting and transport equipment of subway tunnel escalators machine halls. METHODS: With regard to the specific features of the design, numerical simulation of the technical state of the interlocked sections of the stud-bolted suspension of crane beams of lifting equipment of subway tunnel escalators machine halls is considered in this work. The capabilities of the Simulation (static analysis using the finite element method) and Motion (kinematic and dynamic research with formation of systems of differential equations of motion and subsequent solving) modules of the SolidWorks software platform were used in the development of the model. RESULTS: As a result of the carried out research, with regard to the specific features of various methods of the stress-strain state simulation, a spatial linear dynamic model has been developed that reflects the processes occurring during the deformation of the stud-bolt suspension of the supporting I-beam, which is helpful for an objective assessment of its technical state, as well as the possibility and conditions of further operation. CONCLUSIONS: To simulate the stress-strain state, the combined application of methods is necessary, followed by a wavelet analysis of wave processes, which increases the reliability of diagnostic procedures and, consequently, makes it possible to make reasonable decisions about the further operation of the facility.

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“…The point is that there can be no correlation between the PGA and macro seismic intensity. This issue has been widely discussed in literature [14][15][16][17]. Let us consider an example of a situation when the car passes over the bridge and pebbles bounce on it.…”

Section: Introductionmentioning

confidence: 99%

Setting the level of design inputs for the seismic stability structures

Uzdin

Ivanova

Sorokina

et al. 2022

J. Phys.: Conf. Ser.

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The paper deals with the task of setting the level of the design input for assessing the structure seismic resistance. An increase in the expected peak ground accelerations with the development of the earthquake engineering from 1 m/s2 to 7 m/s2 is noted. The absence of a correlation between the peak ground accelerations and the seismic action intensity, as well as the dependence of the peak ground accelerations on the action spectral composition, is explained. A method of determining the ground design acceleration using the standard seismic scale in force in Russia is shown. The illogicality of setting the design input according to of the Guidelines “Earthquake Engineering” in force in Russia is shown and ways of correcting the current situation are indicated. It is noted that to solve the problem of setting the design input, no seismic zoning maps are required. Information on seismic hazard can be represented by a single number characterizing the relationship between the intensity and repeatability of the action on the construction site. The relationship between the design accelerations stated in the «Earthquake Engineering» Guidelines and the peak ground accelerations in the «Seismic Intensity Scale» State Standard is explained. The approach described in the paper is the basis for input setting for performance-based designing.

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Some principles of generating seismic input for calculating structures

Cited by 7 publications

References 18 publications

Reasponse-spectra method for assessing seismic resistance of structures possibilities and prospects of usage

Reasponse-spectra method for assessing seismic resistance of structures possibilities and prospects of usage

Technical diagnostics of heembedded elements of crane tracks of lifting equipment in machine halls of tunnel escalators

Setting the level of design inputs for the seismic stability structures

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