Dynamic analysis of a pedestrian timber truss bridge at three construction stages

Bergenudd, Jens; Battini, Jean-Marc; Crocetti, Roberto

doi:10.1016/j.istruc.2023.105763

Structures

2024

DOI: 10.1016/j.istruc.2023.105763

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Dynamic analysis of a pedestrian timber truss bridge at three construction stages

Jens Bergenudd,

Jean-Marc Battini,

Roberto Crocetti

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2024

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Cited by 3 publications

References 21 publications

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Seismic resistance analysis and optimization of gymnasium truss structure

Wang,

Li,

Zhao

2024

Vib. proced.

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The gymnasium is mainly composed of truss structure, with a large span, and requires high seismic performance. To ensure greater stability of the truss structure, modal analysis was conducted on the mechanical model, yielding the natural frequencies and modal shapes. In order to improve the seismic performance, BRB rods were added to the support points, and the frame structure was reinforced with diagonal braces. Through modal verification, it can be seen that the stiffness of the truss structure was significantly improved. The internal forces of the truss were simulated under the El Centro and Taft seismic wave conditions. The results show that the optimized structure can significantly reduce the internal forces and improve the overall seismic performance. The fundamental natural period of the reinforced structure is less than that of the unreinforced structure, and the stiffness of the reinforced steel structure increases, making it more sensitive to vertical seismic motion.

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Seismic resistance analysis and optimization of gymnasium truss structure

Wang,

Li,

Zhao

2024

Vib. proced.

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Modal analysis and seismic optimization of multi-storey gymnasium frame

Zhao,

Wang,

2024

Vib. proced.

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In order to improve the seismic resistance capacity of the multi-storey gymnasium frame, based on the finite element analysis method, the dynamic response characteristics were analyzed, and the natural frequencies and vibration modes were obtained. Based on the results of the modal analysis, different reinforcement methods were proposed for verification. Under the excitation conditions of Borego waves, the vibration responses of different nodes in initial model were obtained. Modal verification was carried out by using two methods of shear strengthening and support rod strengthening respectively. The analysis results show that the bearing capacity of the single-span frame is insufficient, the lateral stiffness is small, and it is prone to cause severe torsional vibration damage. It can also be known that the seismic resistance capacity of the support rods reinforcement is more balanced in different directions. It can not only effectively improve the lateral stiffness and bearing capacity of the structure, but also improve the seismic performance of the main structure through the energy dissipation of component yield, which is more suitable for multi-story buildings.

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Analytical Investigation of the Effects of Additional Load Mass on the Fundamental Frequency of Pedestrian Beam Bridges

Spasojević Šurdilović,

Zorić,

Živković

et al. 2024

Applied Sciences

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The aspect of resonant vibrations due to pedestrian movement is of great significance in engineering practice. Therefore, understanding the variations in the natural frequency of bridge structures under varying positions of additional mass is of particular interest. This paper presents a procedure for the straightforward determination of the natural frequencies of a beam pedestrian bridge for various positions of pedestrians or a service vehicle based on derived analytical solutions. The calculation takes into account the inertial effects of the additional load mass, modeled as either uniformly distributed or concentrated. The importance of additional load mass effects on the fundamental frequency of a beam pedestrian bridge and its dynamic response to a moving pedestrian load is demonstrated on a bridge example. The proposed solutions are also applicable to other girder system structures with uniform mass and stiffness along their span.

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Dynamic analysis of a pedestrian timber truss bridge at three construction stages

Cited by 3 publications

References 21 publications

Seismic resistance analysis and optimization of gymnasium truss structure

Seismic resistance analysis and optimization of gymnasium truss structure

Modal analysis and seismic optimization of multi-storey gymnasium frame

Analytical Investigation of the Effects of Additional Load Mass on the Fundamental Frequency of Pedestrian Beam Bridges

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