Field Investigation and Numerical Analysis of Damage to a High-pier Long-span Continuous Rigid Frame Bridge in the 2008 Wenchuan Earthquake

Zeng, Xianzhi; Deng, Kailai; Wang, Yuechen; Yan, Guihao; Zhao, Canhui

doi:10.1080/13632469.2020.1868361

Cited by 20 publications

(2 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Kelly [8] initially proposed the concept of sliding isolator with variable friction (SIVF), which was further explored by Panchal and Jangid [9] as a means to regulate isolator displacement during severe events. In such isolators, the friction coefficient on the sliding surface is assumed to change gradually with increasing displacement.…”

Section: Sliding Isolator With Variable Friction (Sivf)mentioning

confidence: 99%

Engineering Adaptability: Evolution of Seismic Isolation Systems for Enhanced Resilience.

Libanesh S,

2024

Int. J. Res. Publ. Rev.

View full text Add to dashboard Cite

Section: Sliding Isolator With Variable Friction (Sivf)mentioning

confidence: 99%

Engineering Adaptability: Evolution of Seismic Isolation Systems for Enhanced Resilience.

Libanesh S,

2024

Int. J. Res. Publ. Rev.

View full text Add to dashboard Cite

“…Previous seismic observations have indicated that a large number of canyon bridges were damaged in strong earthquakes. [1][2][3] It is evident that there are many factors affecting the seismic response of bridges, 4 such as dynamic soilstructure interaction, [5][6][7] spatial variability of ground motion [8][9][10] and site effect. [11][12][13] However, among the many influencing factors, the canyon topography has usually been ignored.…”

Section: Introductionmentioning

confidence: 99%

Effect of a V‐shaped canyon on the seismic response of a bridge under oblique incident SH waves

Zhang,

Wang,

Zhang

et al. 2023

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

To elucidate the effect of canyon topography on dynamic response of a bridge, an analytical model for a simply supported bridge crossing a symmetric or non‐symmetric V‐shaped canyon in an elastic half‐space under SH waves is proposed. An exact solution to the dynamic canyon‐bridge interaction problem is derived using wave function expansion and verified by its comparison with past exact solution for a sole bridge model without a canyon. The wave propagation in the half‐space, wave scattering by the canyon and wave radiation from the bridge are all taken into account rigorously. Through a systematical parametrical study, it is found that the seismic response of the bridge beam and the wave‐facing side foundation will be significantly amplified. The degree of the topographic amplification is closely related to the geometry of the canyon, the mass and the stiffness of the bridge beam, and the frequency content and angle of the incident wave. The potential adverse effects of a V‐shaped canyon on a bridge should be considered in its seismic design.

show abstract

Seismic response characteristics and whiplash effect mechanism of continuous rigid-frame bridges subjected to near-fault ground motions

2023

Bull Earthquake Eng

View full text Add to dashboard Cite

Continuous rigid-frame bridge (CRFB) is widely constructed in western China with high seismicity areas. To investigate the seismic response characteristics and whiplash effect mechanism of CRFBs under near-fault ground motions, this study selects a long-span CRFB with high piers as the prototype bridge and develops the nonlinear finite element model based on OpenSees. In this work, three groups of near-fault ground motions having forward directivity pulse, fling-step pulse and non-pulse are selected as seismic inputs. These records are intercepted using significant duration index and scaled to 0.2 g, 0.4 g, and 0.64 g, representing basic ground motions, frequent ground motions and rare ground motions, respectively. The study analyzes the seismic response characteristics of CRFBs and discusses the effects of bearing constraints, ground motion components and vertical excitations on the seismic responses. The numerical results show that the longitudinal vibration, transverse whiplash effect and vertical uplift behavior of main girder are main deformation characteristics of CRFBs. Compared with non-pulse earthquakes, the structural displacements, lateral drift angles, bearing deformations, internal forces and pounding effects all significantly increase under pulse-like earthquakes. There are spatial torsional effects in mid-span girder and main piers and pounding effects between girder ends and transition pier top. The perfectly-free and fixed bearings in transverse direction are not recommended for the seismic design of CRFBs. An optimal stiffness ratio in friction pendulum systems may exist that can minimize bending degree of the main girder. Furthermore, the side-span girder under pure longitudinal excitations can uplift that is closely  Long-He Xu

show abstract

Field Investigation and Numerical Analysis of Damage to a High-pier Long-span Continuous Rigid Frame Bridge in the 2008 Wenchuan Earthquake

Cited by 20 publications

References 24 publications

Engineering Adaptability: Evolution of Seismic Isolation Systems for Enhanced Resilience.

Engineering Adaptability: Evolution of Seismic Isolation Systems for Enhanced Resilience.

Effect of a V‐shaped canyon on the seismic response of a bridge under oblique incident SH waves

Seismic response characteristics and whiplash effect mechanism of continuous rigid-frame bridges subjected to near-fault ground motions

Contact Info

Product

Resources

About