A study on preventing the fall of skew and curved bridge decks by using rubber bearings

Ijima, Katsushi; Obiya, Hiroyuki; Aramaki, Gunji; Kawasaki, Noriaki

doi:10.12989/sem.2001.12.4.347

Cited by 8 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A variety of seismicmitigationtechnologieshave been proposed for bridges, including seismic isolation bearing, passive energy dissipation devices, tuned damper, and semiactive damping devices. Seismic isolation devices, such as rubber or lead rubber bearings, have been used to reduce seismic forces [13][14][15][16]. However, the use of lead rubber bearings can lead to large displacements, which consequently increase the possibility of pounding between adjacent segments or even unseating damage.…”

Section: Introductionmentioning

confidence: 99%

Seismic Mitigation of Curved Continuous Girder Bridge Considering Collision Effect

Kang

Chen

2022

Symmetry

View full text Add to dashboard Cite

Due to structural irregularity, curved bridgesaremore likely to cause non-uniform collisions and unseating between adjacent components when subjected to earthquakes. Based on the analysis of the collision response of curved bridges duringearthquakes, and according to the seismic characteristics of curved bridges, research was carried out on pounding mitigation and unseating prevention measures. A curved bridge with double column piers was taken as an engineering example, and a finite element model of curved bridges thatcould consider the non-uniform contact collision between adjacent components was built with ABAQUS software. Viscoelastic dampers, viscous dampers, and a lead rubber bearing were selected as the damping devices, and a steel wire rope-rubber mat was used as the pounding mitigation device to form the combinatorial seismic mitigation system. Based on the principle of energy dissipation combined with constraints, three kinds of combined seismic mitigation case were determined; a seismic response analysis was then performed. The results indicated that the three kinds of combined seismic case were effective atreducing the response topounding force, stress, damage, girder torsion and displacement, and achieved the goals of seismic mitigation and unseating prevention.

show abstract

Section: Introductionmentioning

confidence: 99%

Seismic Mitigation of Curved Continuous Girder Bridge Considering Collision Effect

Kang

Chen

2022

Symmetry

View full text Add to dashboard Cite

show abstract

“…Kou et al [3] studied the effects of warping, non-coincidence of the shear center and the centroid of the section, flexibility of piers, and radius of curvature on free vibration of curved thin-walled girder bridges. They found that, natural frequencies of curved bridges are affected significantly by the flexibility of piers and the radius (or curvature); Studies of Ijima et al [4] showed that high stiffness of rubber bearings and a small distance between stiffness and mass centers were effective in reducing the displacement of the deck due to seismic pounding. Zhao [5] studied the response of curved bridges to the longitudinal and transversal GMs and found that though maximum displacements and internal forces of the curved bridges still occurred in parallel with the GM directions, different degrees of coupling were also generated, and peak responses did not necessarily coincide with the GM peak with some phase lags.…”

Section: Introductionmentioning

confidence: 99%

“…Examples include Tseng and Penzien [9,10], who have used mathematical models to investigate nonlinear seismic behavior of long curved multi-span reinforced concrete bridges that collapsed during the 1971 San Fernando earthquake. Ijima et al [4] developed analytical models to investigate the prevention of collapse of the decks of skew and curved bridges due to seismic pounding. With the rigid-deck assumption, the analytical model would be easier to establish.…”

Section: Introductionmentioning

confidence: 99%

Eccentricity-Induced Seismic Behavior of Curved Bridges Based on Controllability

Wang

2020

Symmetry

View full text Add to dashboard Cite

The difficulty in curved bridge design lies in the eccentricity. Eccentricities break the regularity and make it difficult to resist horizontal loads. However, relatively stable and robust performance can still be achieved through properly aligned eccentricity. This paper used the controllability-related concepts, the controllability Grammians and Hankel singular values (HSVs), to study the impact of eccentricities on the seismic performance of curved bridges. An analytical model was expressed by second order differential equations with rigid deck assumption. Six eccentricity cases: three different radii (resulting in different center of mass (CM)), three different bearing arrangements (resulting in different center of stiffness (CS)), and variable earthquake directions (resulting in different moment arms) were strategized for research. Analyses showed that effects of eccentricities (offsets of CS from CM) can be extensively interpreted by controllability indices. Proper eccentricity may “reach” and thus “control” the responses better and decrease the coupling effects, counteract the unfavorable excitation effects, and make the bridge less sensitive to excitation changes. In this sense, regularity or stability could be somewhat re-established through design. Time history analyses confirmed the results.

show abstract

Shake table experimental study of curved bridges with consideration of girder-to-girder collision

Jiao

Liu

et al. 2021

Engineering Structures

View full text Add to dashboard Cite

A study on preventing the fall of skew and curved bridge decks by using rubber bearings

Cited by 8 publications

References 0 publications

Seismic Mitigation of Curved Continuous Girder Bridge Considering Collision Effect

Seismic Mitigation of Curved Continuous Girder Bridge Considering Collision Effect

Eccentricity-Induced Seismic Behavior of Curved Bridges Based on Controllability

Shake table experimental study of curved bridges with consideration of girder-to-girder collision

Contact Info

Product

Resources

About