Accidents of the Bridge Structures and Their Reasons

Dergunov, Sergey A.; Satyukov, A.B.; Spirina, A.Y.; Serikov, S. V.

doi:10.35803/1694-5298.2019.2.289-294

Cited by 7 publications

(4 citation statements)

References 1 publication

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“…Структура ультраосновных массивов Изучение габбро-ультрамафитовых массивов Полярного Урала ведется уже почти 100 лет [Zavaritsky, 1932;и др. ], исследованию строения и внутренней структуры, возраста и другим вопросам геологии Рай-Иза и Войкаро-Сыньинского массива посвящено достаточно много работ [Dergunov et al, 1975;Kazak et al, 1976;Dobretsov et al, 1977;Lennykh et al, 1978;Savelieva, 1987;Puchkov, Steinberg, 1990;Savel'ev, 1996;Perevozchikov et al, 2005;Rybalka et al, 2011;Sychev, Kulikova, 2012;Estrada et al, 2012;State Geological Map…, 2013;Kuznetsov, Romanyuk, 2014;Kulikova et al, 2015;Vakhrusheva et al, 2017;и др. ], причем Рай-Из изучен существенно лучше, поскольку он и меньше, и транспортно гораздо доступнее, и привлекал больше внимания, так как содержит уже найденные месторождения хромитов.…”

Section: структура региона и геодинамическаяunclassified

“…Массив Рай-Из имеет серповидную форму (выпуклую к северу), занимает площадь ≈380 км 2 и ограничен со всех сторон разломами, падающими под массив [Zavaritsky, 1932;Puchkov, Steinberg, 1990;и др.]. Считается хорошо доказанным [Dergunov et al, 1975;Puchkov, Steinberg, 1990;и др. ], что массив Рай-Из находится в аллохтонном залегании и слагающие его дунит-гарцбургитовый и верлит-клинопироксенит-габбровый комплексы были выведены в виде мощной пластины из глубинных зон островодужного сектора Урала и шарьированы в верхние горизонты земной коры на неметаморфизованные терригенно-кремнистые толщи континентального склона.…”

Section: структура региона и геодинамическаяunclassified

“…Южнее, т.е. структурно выше, располагается пластина амфиболовых (зачастую глаукофансодержащих) сланцев, далее идут интенсивно рассланцованные, тектонизированные серпентиниты, которые постепенно замещаются сначала массивными серпентинитами, а потом слабосерпентинизированными ультрабазитами [Dergunov et al, 1975;Puchkov, Steinberg, 1990;и др. ].…”

Section: структура региона и геодинамическаяunclassified

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On the Nature of the Kharamatolou Structure and the Ratio of the Amount of Ultramafic Rocks of the Voykar-Synya Massif to That of the Ray-Iz Massif, Polar Urals

Ivanov,

Vakhrusheva,

Shiryaev

et al. 2024

Geodin. tektonofiz.

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There have been petrographic, geochemical, geochronological (Rb-Sr, Ar-Ar) and isotopic (Sm-Nd) studies done on the metamorphic formations of the Kharamatolou structure of the Polar Urals, which were usually assigned to the Precambrian. The temperatures of metamorphism have been shown to range from 450 to 626 °C, and the pressures – from 3.7–9.1 kbar once PT-conditions reached the amphibolite facies. The amphibolites of the Kharamatolou formation are geochemically divided into two groups. According to the distribution spectra of lanthanides and Nd isotope composition, one group has the characteristics similar to depleted N-MORB basalts εNd(0)=+7.0, and another group – those similar to moderately enriched E-MORB basalts εNd(0)=+(4.5–2.4). It has been found that the Kharamatolou structure is probably composed of the Early to Middle Paleozoic continental rise deposit of the Russian Platform, which passed the main stage of folding and metamorphism in the Late Devonian (Rb-Sr, 366±11 Ma). The gabbro-ultrabasic Ray-Iz and Voykar-Synya massifs have been shown to be one during most of their Pre-Triassic history. Now these ultrabasite massifs are separated by the young (Triassic) Kharamatolou uplift which is an erosive-tectonic semi-window where ultrabasic rocks of the Polar-Ural belt are exposed at the base of the thrust fault. The Kharamatolou structure is one of the transverse uplifts of the Urals which probably resulted from the Middle to Late Triassic compression therealong. As a result of the Middle to Late Triassic uplift of the Haramatolou metamorphites, the overlying ultrabasites were washed away by erosion. The mélange serpentinites observed in the center of the Kharamatolou structure are uneroded remnants of the link that once existed between the Ray-Iz and Voikar-Synya massifs. This significantly increases the metallogenic potential of the Voikar-Synya massif, as the Ray-Iz hosts the largest known chromite deposits in Russia.

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Section: структура региона и геодинамическаяunclassified

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On the Nature of the Kharamatolou Structure and the Ratio of the Amount of Ultramafic Rocks of the Voykar-Synya Massif to That of the Ray-Iz Massif, Polar Urals

Ivanov,

Vakhrusheva,

Shiryaev

et al. 2024

Geodin. tektonofiz.

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“…According to the research results [1][2][3], errors at the construction stage account for about 15% of the main causes of emergency destruction of bridges. Even when performing many times debugged earlier technological operations, abnormal situations are possible, which is clearly confirmed by the information in [4][5][6], and with the complication of the structural design of the elements, the risk of their occurrence increases even more.…”

Section: Introductionmentioning

confidence: 99%

Features of bridge superstructures modeling during the stress-strain state monitoring

Zasukhin,

Ivanov,

Kuzmenkov

et al. 2023

E3S Web Conf.

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The complication of element design performance of artificial structures leads to the need for more detailed superstructure modeling, since simplified models don`t always allow taking into account deformation features of elements. In addition, during the building period, the actual stress-strain state of structures can be significantly influenced by factors that are difficult or impossible to account for at the design stage. Correct modeling of deformation of elements is one of the essential conditions for the prevention of emergencies during construction, maintenance or timely elimination of the consequences of such incidents with minimal losses. When performing this kind of work, attention should be focused on the most significant design parameters, which comprehensively reflect the nature of the structure operation. This will make it possible to effectively carry out control and promptly make appropriate adjustments to the building process, if it is necessary. The article describes an example of the simplified model modernization to more fully match its actual deformation and the experience of eliminating the consequences of emergency that arose during erection of unique bridge. Thus, the importance of adapting the computational model to the actual nature of the engineering design is confirmed.

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Features of Monitoring the Stress-Strain State of Structures During the Construction of Bridge Crossings

Zasukhin

Ivanov

Kuzmenkov

et al. 2022

Lecture Notes in Networks and Systems

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Accidents of the Bridge Structures and Their Reasons

Abstract: Examples of the destruction of bridge structures caused by overloading of the supporting structure, the appearance of aging material and the adverse effects of the operational environment are considered.

Cited by 7 publications

References 1 publication

On the Nature of the Kharamatolou Structure and the Ratio of the Amount of Ultramafic Rocks of the Voykar-Synya Massif to That of the Ray-Iz Massif, Polar Urals

On the Nature of the Kharamatolou Structure and the Ratio of the Amount of Ultramafic Rocks of the Voykar-Synya Massif to That of the Ray-Iz Massif, Polar Urals

Features of bridge superstructures modeling during the stress-strain state monitoring

Features of Monitoring the Stress-Strain State of Structures During the Construction of Bridge Crossings

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