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Static response of curved steel thin-walled box-girder bridge subjected to Indian railway loading

Verma V., Nallasivam K.

Journal of Achievements in Materials and Manufacturing Engineering

2021

Vol. 108, nr 2

63--74

Purpose: The primary objective of the current study is to numerically model the steel thin-walled curved box-girder bridge and to examine its various response parameters subjected to Indian Railway loading. Design/methodology/approach: The analysis is conducted by adopting a one dimensional curved thin-walled box-beam finite beam element based on finite element methodology. The scope of the work includes a computationally efficient, three-noded, one-dimensional representation of a thin-walled box-girder bridge, which is especially desirable for its preliminary analysis and design phase, as well as a study of the static characteristics of a steel curved bridge, which is critical for interpreting its dynamic response. Findings: The analytical results computed using finite element based MATLAB coding are presented in the form of various stress resultants under the effect of various combinations of Indian Railway loads. Additionally, the variation in different response parameters due to changes in radius and span length has also been investigated. Research limitations/implications: The research is restricted to the initial design and analysis phase of box-girder bridge, where the wall thickness is small as compared to the cross-section dimensions. The current approach can be extended to future research using a different method, such as Extended finite element technique on curved bridges by varying boundary conditions and number of elements. Originality/value: The validation of the adopted finite element approach is done by solving a numerical problem, which is in excellent agreement with the previous research findings. Also, previous studies had aimed at thin-walled box girders that had been exposed to point loading, uniformly distributed loading, or highway truck loading, but no research had been done on railway loading. Moreover, no previous research had performed the static analysis on thin-walled box-girders with six different response parameters, as the current study has. Engineers will benefit greatly from the research as it will help them predict the static behaviour of the curved thin-walled girder bridge, as well as assess their free vibration and dynamic response analysis.

Numeryczna analiza pracy skrzynkowego dźwigara stalowego ze środkami wzmocnionymi techniką klejenia

Kubieniec G.

Zeszyty Naukowe. Budownictwo / Politechnika Śląska

2007

z. 112

121-128

Celem niniejszej pracy jest rozpoznanie rezerwy nośności blachownie o średnikach płaskich, wynikającej z zastosowania w tych ostatnich w stanie nadkrytycznym wzmacniających elementów doklejanych. Dotychczasowe badania przeprowadzone na BTU Cottbus wskazują, że wzmacnianie blachownie o smukłych środnikach przez doklejenie elementów płytowych do środników jest efektywne i podnosi nośność blachownie więcej niż tradycyjne metody polegające na wprowadzeniu dodatkowego użebrowania. Ponadto, klejenie jest technologicznie konkurencyjne w użyciu i nie wprowadza miejscowych pól naprężeń termicznych, jak to ma miejsce w przypadku spawania. Opracowanie modelu numerycznego pozwala na dogodną symulację ustroju złożonego z faz metal-klej

The purpose of this work is to describe the reserve of strength of girders with plane webs resulting from the application of strengthening elements tied with an adhesive glue. The present experimental investigations conducted at BTU Cottbus clearly proved that strengthening plate girders with slender webs with use of plate elements glued to the webs is effective and increases carrying capacity more than traditional methods of strengthening based on application of additional welded stiffeners. Moreover the application of adhesives is technological competitive in use and does not introduce thermal stress fields that is characteristic for welding. The study of a numerical model allows to make a convenient simulation of a system consisted of phases steel - adhesive.