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    Wyświetlanie 1-3 z 3
    Tytuł:
    An Analysis Of Stress Intensity Factor Due To Normal Stress For A Cracked Plate Reinforced With A Sheet By Seam Welding
    Analiza współczynnika intensywności naprężeń wynikających z prostopadłego naprężenia dla pękniętej płyty wzmocnionej płytą przyspawaną szwem
    Autorzy:
    Kim, O.-H.
    Kim, Y. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/352434.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    stress intensity factor
    seam welding
    singular integral equation
    reinforcement effect
    współczynnik intensywności naprężeń
    spawanie
    efekt wzmacniający
    Opis:
    It is essential in damage tolerance design to determine the stress intensity factor theoretically. The stress intensity factor for a cracked plate that is reinforced with a sheet by seam welding is determined theoretically and plotted as function of the seam welding location and stiffness ratio. The singular integral equation is derived based on the compatibility condition between the cracked plate and the reinforcement plate, and it is solved by means of Erdogan and Gupta‘s method. The theory is verified by comparing the results of the present analysis with those of a numerical analysis. The results from the present analysis show that the reinforcement effect improves as the welding line is situated closer to the crack and as the stiffness ratio of the cracked plate and the reinforcement plate increases.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2B; 1441-1444
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on reinforcement technology of existing double-way curved arch bridge
    Autorzy:
    Zhang, Kexin
    Qi, Tianyu
    Xue, Xingwei
    Li, Yanfeng
    Zhu, Zhimin
    Powiązania:
    https://bibliotekanauki.pl/articles/1852535.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    wzmocnienie
    most dwukierunkowy
    most łukowy
    most zakrzywiony
    zwiększenie przekroju
    efekt wzmocnienia
    croscross-section increasing
    reinforcement
    two-way bridge
    curved bridge
    arch bridge
    reinforcement effect
    Opis:
    Two-way curved arch bridges inherit the fine tradition of masonry structures, making full use of the advantages of prefabricated assembly, it adapts to the situation of no support construction and no large lifting machine and tools, and has the characteristics of convenient construction method and saving material consumption. In appearance, the two-way curved arch bridge has strong national cultural characteristics. The prefabricated components of the two-way curved arch bridge are fragmentary, complicated in bearing and poor in integrity. Most of the two-way curved arch bridges in service have been built for a long time and lack of maintenance and management. Increasing the cross-section reinforcement method is one of the two-way curved arch reinforcement methods. It has a significant effect, convenient construction, good rigidity and stability characteristics after the reinforcement. Through theoretical analysis, combined with a static load test results of the assessment of the bridge reinforcement effect. Through load test, it is found that the deflection of the arch rib after reinforcement is reduced by 9%~19% and the strain of the arch rib is reduced by 12%~22%. Through finite element calculation, the crack width of the reinforced arch rib decreases by 8.3%~14.2%. The results show that the stress and deflection are greatly improved by the method of increasing section.
    Źródło:
    Archives of Civil Engineering; 2021, 67, 2; 581-595
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application research of high pressure jet grouting pile in an underground engineering in Vietnam
    Autorzy:
    Nguyen, Xuan Loi
    Wu, Li
    Nguyen, Khanh Tung
    Bui, Quang Anh
    Powiązania:
    https://bibliotekanauki.pl/articles/231234.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ciśnienie wysokie
    pal jet grouting
    podstawa pala
    odkształcenie
    fundament
    kontrola przesączania
    efekt wzmocnienia
    high pressure
    jet grouting pile
    pile principle
    deformation
    foundation
    seepage control
    reinforcement effect
    Opis:
    High-pressure jet grouting pile is a kind of stratum reinforcement technology developed in recent years. Due to its characteristics of high solid strength, fast construction, low noise, safety and reliability, low cost, controllable reinforcement diameter, strong adaptability to stratum, and good reinforcement effect for soft soil, loose soil and water-rich stratum, high-pressure jet grouting pile technology has been more and more widely used in foundation treatment, water stop, and seepage prevention, tunnel lining and other fields in recent years. As a country with a relatively late development of underground construction engineering, Vietnam has little research on special geotechnical reinforcement technology, especially on special geotechnical reinforcement technology around urban underground construction engineering, especially on its theoretical analysis and practical application. Therefore, this thesis combines the Vietnam Trung Hoa tunnel project as an example, using the theoretical calculation formula and field monitoring measurement comparing the two methods, the high pressure jet grouting pile system research in Vietnam in the underground engineering reinforcement principle and application effect, get to the actual engineering design and construction has a guiding significance to the research, provides the reference for future similar projects. Finally, the application effect of high-pressure jet grouting pile in underground building reinforcement project is evaluated, which proves that high-pressure jet grouting pile has good applicability and economic benefit in underground building reinforcement project in Vietnam.
    Źródło:
    Archives of Civil Engineering; 2020, 66, 3; 575-593
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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