Experimental Study of the Aseismic Effect of a Locking Ball for a Continuous Bridge

Zhang, Wenxue; Fang, Rong; Chen, Shitong; Zhao, Huimin

doi:10.1061/(asce)be.1943-5592.0001099

Cited by 8 publications

(2 citation statements)

References 14 publications

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“…Due to the unpredictability of earthquakes, it is obviously one-sided and insufficient to only carry out the anti-seismic design of bridge structures in terms of materials and mechanical properties. In the seismic research of bridges, the use of shaking table tests to simulate real earthquakes is the most direct and effective method to study the seismic response and catastrophic mechanism of bridge structures currently [15], and it is also an important means to evaluate the seismic isolation effect of various components [16][17].…”

Section: Introductionmentioning

confidence: 99%

Research on seismic performance of new bridge pier seismic reduction isolation system based on shaking table test

Wu¹

2022

J. vibroeng.

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In view of the current poor seismic performance of bridges, this paper started with the vibration isolation and reduction mechanism of the bearing, and deduced the coordination relationship between the stress and the deformation of the bearing under the vibration isolation and vibration reduction working conditions. Combined with the shaking table test, the defect that the traditional rubber bearing has poor seismic isolation effect was analyzed. Based on this, a base-bearing double reduction system was proposed and its vibration reduction and isolation effect was compared with the traditional bearing. The shaking table test results showed that, compared with the traditional bearing, the proposed vibration reduction system had better energy dissipation effect and could weaken the apparent cracking damage of the pier under the action of earthquake. Under the 125 m/s2-750 m/s2 peak acceleration excitation of the EI-Centro wave, the proposed vibration reduction system could greatly reduce the displacement variation of the upper main beam by 20 %-47 %. Moreover, the results of dynamic amplification factor measured at the corresponding height of the two types of piers also verified that the proposed base-bearing double vibration reduction system had greater competitiveness when the peak acceleration of seismic waves was less than 500 m/s2.

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Section: Introductionmentioning

confidence: 99%

Research on seismic performance of new bridge pier seismic reduction isolation system based on shaking table test

Wu¹

2022

J. vibroeng.

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“…To achieve a better balance of internal forces and displacements between the superstructure and piers in continuous girder bridges, a more reasonable seismic design of continuous girder bridge is required. Therefore, the winding rope device activated by a fluid viscous damper (WRD-D) was proposed, based on research into the collaborative loading of sliding piers and fixed piers in continuous girder bridges (Zhang et al, 2017; Fang et al, 2019). In practical seismic design, the WRD-D should be installed on the top of sliding piers and connected to the superstructure by winding ropes.…”

Section: Introductionmentioning

confidence: 99%

Seismic performance of a continuous bridge with winding rope device activated by a fluid viscous damper

Zhang

et al. 2022

Advances in Structural Engineering

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The seismic requirements of piers with fixed bearings (the fixed pier) for continuous girder bridges are relatively high, while the potential seismic capabilities of piers with sliding bearings (the sliding piers) are not fully utilized. To solve this contradiction, a new type of winding rope shock absorption device activated by a fluid viscous damper (WRD-D) was proposed. The WRD-D was installed on the top of the sliding piers, and the both ends of a fluid viscous damper were connected to the superstructure by winding ropes. During an earthquake, the damping force rises with the increase of relative speed between the sliding piers and the superstructure, activating the WRD-D and producing large frictional resistance, subsequently causing the sliding piers and the fixed pier to bear the seismic load cooperatively. In this study, the working mechanism of the WRD-D was researched. The shaking table test of a scaled continuous girder bridge model employing the WRD-D was conducted. The test results reveal that the WRD-D can effectively reduce the seismic requirements of the fixed pier and the superstructure displacements.

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Seismic resistance of locking ball devices and optimal design for irregular continuous bridges with one fixed pier

Fang

Zhang

Chen

et al. 2020

Bull Earthquake Eng

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Experimental Study of the Aseismic Effect of a Locking Ball for a Continuous Bridge

Cited by 8 publications

References 14 publications

Research on seismic performance of new bridge pier seismic reduction isolation system based on shaking table test

Research on seismic performance of new bridge pier seismic reduction isolation system based on shaking table test

Seismic performance of a continuous bridge with winding rope device activated by a fluid viscous damper

Seismic resistance of locking ball devices and optimal design for irregular continuous bridges with one fixed pier

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