Experimental and numerical study on seismic sliding mechanism of laminated-rubber bearings

Xiang, Nailiang; Li, Jianzhong

doi:10.1016/j.engstruct.2017.03.032

Cited by 81 publications

(27 citation statements)

References 16 publications

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“…Table 1 shows the different methods to determine the shear modulus of elastomeric bearings from the experimental curves in various design codes, where all the codes use the secant line method to determine the elastic shear modulus of elastomeric bearings. Table 2 lists the calculated shear moduli from different code methods based on the experimental results of Xiang and Li (2017). It can bee seen from Table 2 that the effective shear modulus for the single-side bonded elastomeric bearings, G e was found lower than the values obtained from the methods in ASTM D4014 (2007) and AASH TO M251 (2008), while larger than the values specified in MTC (2019).…”

Section: Effective Shear Stiffnessmentioning

confidence: 94%

“…The cyclic behaviors of top-side bonded bridge elastomeric bearings under lateral loads were experimentally investigated by using quasi-static tests (Xiang and Li 2017), as shown in Fig. 8.…”

Section: Option Of Bonding Positionmentioning

confidence: 99%

“…However, for the single-side bonded elastomeric bearings, the shear stiffness of the bearings is usually lower than the normal values due to the participation of curling deformations. The experimental study conducted by Xiang and Li (2017) defined an effective shear stiffness for the single-side bonded elastomeric bearings, which is a secant stiffness reaching from the zero point to the point indicating the occurrence of obvious sliding. The obvious sliding is seen when the shear deformation of elastomeric bearings reaches its peak.…”

Section: Effective Shear Stiffnessmentioning

confidence: 99%

See 2 more Smart Citations

Effect of bonding or unbonding on seismic behavior of bridge elastomeric bearings: lessons learned from past earthquakes in China and Japan and inspirations for future design

Xiang

Goto

Alam

et al. 2021

ABEN

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Economical laminated elastomeric bearings are well-adopted options for load transmission components of bridges from superstructure to substructure. In most cases, the design of such elastomeric bearings primarily depends on the requirements from service-level conditions such as superstructure thermal movements, with little consideration of extreme loads like earthquakes. However, bridge elastomeric bearings are very likely to be subjected to earthquake hazards, particularly for bridges located in high seismic regions. This study presents an overview of the observed typical damages of bridge elastomeric bearings in the past major earthquakes mainly in China and Japan. Comparisons of different damage patterns are conducted based on the different installations of bridge elastomeric bearings (bonding or un-bonding). The effect of bearing installation methods on the overall seismic behavior of bridges is also discussed. A desirable installation method for bridge elastomeric bearings against strong earthquake loads is recommended, which is expected to overcome the critical limitations of current design practice.

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Section: Effective Shear Stiffnessmentioning

confidence: 94%

Section: Option Of Bonding Positionmentioning

confidence: 99%

Section: Effective Shear Stiffnessmentioning

confidence: 99%

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Effect of bonding or unbonding on seismic behavior of bridge elastomeric bearings: lessons learned from past earthquakes in China and Japan and inspirations for future design

Xiang

Goto

Alam

et al. 2021

ABEN

Self Cite

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“…Recent large earthquakes have demonstrated that highway bridges in the regions of high seismicity are susceptible to experience severe damages 1,2 . A large residual drift in bridge piers is one of the major causes of failures during earthquakes such as the Northridge 1994, Kobe 1995, Chi‐Chi 1999, Wen‐Chuan 2008, and other events 3 . Following the 1995 Kobe earthquake in Japan, more than 100 reinforced concrete (RC) bridge piers were demolished due to a high residual drift (over 1.75%) 4 .…”

Section: Introductionmentioning

confidence: 99%

Seismic performance assessment of a multispan continuous isolated highway bridge with superelastic shape memory alloy reinforced piers and restraining devices

Wang

Alam

2020

Earthq Engng Struct Dyn

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The objective of this study is to analytically determine the effectiveness of a novel bridge system with superelastic (SE) shape memory alloy (SMA) reinforced concrete piers. The bridge is also equipped with SE SMA cable restrainers to prevent the bridge spans from a large displacement that can potentially cause span unseating. In the concrete bridge piers, the conventional steel reinforcements in the plastic hinge regions are replaced with SE SMA rebar to avoid large plastic deformation and improve its self-centering capacity. A typical three-span continuous highway bridge is modeled with SMA-reinforced piers and SMA restrainers. Numerical simulations of the bridge are conducted under destructive near-fault ground motions. The seismic responses and fragility curves of the novel bridge (Bridge IV) are assessed and compared with the reference bridge (Bridge I), the bridge with only SMA-reinforced piers (Bridge II), and the bridge with only SMA restrainers (Bridge III). The results revealed that the SMA-reinforced pier can successfully reduce the residual deformation and damage probability of the bridge; however, the bridge with only SMAreinforced piers is less efficient in preventing a large displacement. The use of SMA restrainers can efficiently limit the displacement of the bridge spans but increase the damage probability of the bridge piers. The proposed novel bridge having SMA-reinforced piers equipped with SMA restrainers (Bridge IV) is more efficient than the bridge with only SMA-reinforced piers (Bridge II)) or the bridge with only SMA restrainers (Bridge III).

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“…us, the problem of how to limit the girder displacement effectively without obviously increasing the seismic force of the pier has become crucial in the seismic design of this kind of bridge. Xiang et al [2][3][4][5] studied the slippage mechanism of plate rubber bearings through experiments and discussed the seismic response characteristics of plate rubber bearings with different types of transverse limit devices. In addition, the seismic performance of an X-shaped steel damper was tested using shaking table tests.…”

Section: Introductionmentioning

confidence: 99%

Design Criterion and a Technical Approach for the Controlled Seismic Behavior of Continuous Girder Bridges

Gao

Song

Wang

et al. 2019

Shock and Vibration

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Seismic design involving “fuse components” between the superstructure and substructure can improve the seismic performance of continuous girder bridges during strong earthquakes by ensuring an elastic working state. The mechanical properties of the “fuse components” directly affect the seismic behavior of continuous girder bridges, and many theoretical and experimental studies of isolation devices to achieve the controlled seismic behavior of continuous girder bridges have been carried out, and some devices are in use in large-scale construction projects. However, there is a lack of evidence from structures that have been subject to earthquakes. Test results show that the shear behavior of isolation bearings is unpredictable and the friction behavior is uncontrollable. Further, limiting devices often suffer from an insufficient deformation capacity and have large space requirements. Therefore, we propose a new type of spherical steel bearing and two kinds of large-stroke steel damping devices with different space requirements. The full-scale test results reveal that the bearing has strong controllability with respect to shearing, stable friction behavior after fracture, and little unpredictability in the friction-based processes. Furthermore, the large-stroke steel damping device shows a full hysteresis curve and excellent energy dissipation characteristics. Finally, using a continuous girder bridge as an example and combined with the results of mechanical tests, the effectiveness of the controlled design criterion was verified using numerical simulations. The calculated results show that, compared with conventional fixed bearings, the shear and bending moments are decreased by 60% and 53%, respectively, and the ratio of both the shear and bending moment response of the pier bottom to its capacity is less than 0.5. However, the ratio of the maximum deformation of the damper to its capacity is only 0.28, and the residual displacement is 0.01 m. Therefore, an alternative scheme is provided for postearthquake maintenance and replacement.

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Experimental and numerical study on seismic sliding mechanism of laminated-rubber bearings

Cited by 81 publications

References 16 publications

Effect of bonding or unbonding on seismic behavior of bridge elastomeric bearings: lessons learned from past earthquakes in China and Japan and inspirations for future design

Effect of bonding or unbonding on seismic behavior of bridge elastomeric bearings: lessons learned from past earthquakes in China and Japan and inspirations for future design

Seismic performance assessment of a multispan continuous isolated highway bridge with superelastic shape memory alloy reinforced piers and restraining devices

Design Criterion and a Technical Approach for the Controlled Seismic Behavior of Continuous Girder Bridges

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