Only studies in structural health monitoring, vibration-based condition assessment, and vibration-based damage detection approaches were reviewed to better highlight vibration …
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Moreover, results of recent scientific research are presented which are of interest for researchers active in studying bridge vibration and control. Envelopes of impact coefficient; ' 0 dyn from ...
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In the same year, wide range of experimental studies were also conducted which included bridge vibration analysis using FE model [13], [18]. As addition, field vibration testing is another method that has been preferred lately in vibration-based methods to complement numerical computation results from FE bridge model. The recent preferences on ...
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Traditionally, vibration-based damage detection techniques in bridges have focused on monitoring changes to modal parameters. These techniques can often suffer to their …
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When a bridge structure is damaged, the natural periods, vibration modes, damping and other vibration characteristics will change. However, more research is still …
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It contains many case studies concerning various types of real bridges such as long-span suspension bridges, cable-stayed bridges, truss bridges, multi-span simply supported bridges and...
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The magnitude of the bridge vibrations was large in the direction of the bridge axis and in the vertical direction, while the value in the direction perpendicular to the bridge axis was small. The low-frequency-sound pressure level showed the same tendency as the main girder vibration, and the response amplitude of the low-frequency-sound ...
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This paper reviews important studies and developments on long-span bridge vibration mechanism and control under wind, seismic, traffic and human-motion excitations.
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Bridge Vibrations. To study the resonant modes of a tied arch bridge, the bridge is first hit with a hammer or your hand. An FFT of the resulting vibrations are examined to find resonant modes. Then the bridge is driven with a sinusoidal force having each of the resonant frequencies.
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Bridge vibration parameters were determined by combining the bridge vibration test results and the results of previous studies. Concrete hardening is a complex and gradually changing process. To study the impact of vibration on the performance of bridge deck pavement repairing HPC, this complex process should be divided into different phases ...
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compromised. For a reliable assessment of acceptability of vibrations to bridge users, it is necessary to define subjective vibration limits for pedestrians – human vibration receivers who are moving across a vibrating surface, rather than being stationary. This paper aims to develop a methodology for defining vibration limits for walking humans.
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This is a three-span bridge. The vibrations of its midspan in the second span were monitored. Three ways of camera placements, including remote, structure-mounted, and drone-mounted cameras as shown in Figs. 4, 5 and 6, are used to measure the vibrations of this bridge. In data processing steps, both Mask R-CNN + SIFT and LK tracker are used.
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The recently built Lathpandura 4/5 bridge located in the Molkawa- Lathpandura road is a 35m long single span steel truss bridge of two lanes. With the road network upgraded in the area, heavier and fast moving vehicles crossing the bridge spawn higher vibrations.
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The purpose of this chapter on vibration control is to examine the effects of wind, heavy traffic, and seismic vibrations on steel and RC highway bridges by providing an overview of bridge performance and failure under different types of induced vibration loading.
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Vibrations Design Guide 11 Fig. 2.1 Recommended peak acceleration for human comfort for vibrations due to human activities Pedestrian Bridge Response • Vertical Vibration • Lateral Vibration Pedestrian Bridge Response • Vertical Vibration (also apply to …
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If unchecked, the vibration can increase drastically, sending destructive, resonant vibrations traveling through a bridge in the form of torsional waves. The most noteworthy example of resonance occurred in 1940, when resonant vibrations destroyed the Tacoma Narrows Bridge in Washington. The incident was especially shocking at the time as the ...
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Bridge vortex-induced vibration (VIV) refers to the vertical resonance phenomenon that occurs in a bridge when pulsating wind passes over it and causes vortices to detach. In recent years, VIV events have been …
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Based on forced vibration tests for high-performance concrete (HPC), the influence of bridge vibration induced by traveling vehicle on compressive strength and …
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The tower wake usually induces large-amplitude vibrations in adjacent suspenders of a long-span suspension bridge. In order to interpret the underlying mechanism of the significant wake-induced vibrations of ultra-long suspenders, the wake-induced vibration characteristics of tandem suspenders beside the bridge tower are investigated using computational fluid …
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Vibration energy has the advantage of abundant availability in the environment of the bridge structure due to consistent traffic flow and high-speed wind blowing.
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Round-end hollow reinforced concrete (RC) tall piers have been widespreadly utilized for railway bridges in river valleys and mountainous regions. The post-earthquake …
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frequency of the bridge vibration varies from Hz to Hz. e Golden Gate Bridge located at San Francisco, USA, has the lowest frequency (.Hz); however, the New Carquinez. Shock and Vibration T : Piezoelectric materials and their properties. Materials Density (g/cm 3) Young s modulus (GPa) Curie temperature ( C)
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When the bridge structure does not have loads passing on it, the vibrations that occur come from earth/microseismic vibrations, vibrations due to wind and surroundings. The maximum acceleration of vibration when there is no train passing is very small, namely 0.003751 g in the x direction (east–west), 0.001450 g in the y direction (north ...
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In engineering practice, a commonly employed strategy to mitigate bridge vibrations without altering the aerodynamic profile of the bridge deck is to augment the structural damping ratio, a method discussed in previous studies [11], [13], [44], [46]. Given the accuracy of the UWIF-SEF predictions, the UWIF-SEF model is employed to evaluate the ...
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