Innovative Seismic Isolation System of Equal Section Multi-span Continuous Beam Bridge with LRB and FVD: Numerical Simulation and Engineering Implementation

DOI

10.2991/gcmce-17.2017.39How to use a DOI?

Keywords

Equal section multi-span continuous beam bridge; Seismic isolation; Lead-rubber bearings (LRB); Fluid viscous damper (FVD); Nonlinear dynamic time-history analysis

Abstract

Lead-rubber bearing (LRB) has small horizontal resistance under creep loads, and its post-yield stiffness reduces quickly under seismic excitations, while the hysteretic behavior of lead core dissipates the seismic energy; Fluid viscous damper (FVD), which is a speed-related energy dissipation device, could provide strong resilience and excellent position-limiting capability. Both devices above are widely used in seismic mitigation and isolation at present. In this paper, three analytical models based on a highway multi-span continuous beam bridge under E2 earthquake were established, two of which adopt LRB and FVD respectively and the other one use both devices. Longitudinal and transverse seismic response were obtained by use of time-history dynamic analysis. The result indicates that LRB can improve performance of bridge transverse dynamic response under earthquake motion but fail to reduce longitudinal seismic response and FVD has capability of diminishing longitudinal seismic response. According to the comparison of behavior of three analytical models under E2 earthquake, the combined use of LRB and FVD is an effective way of seismic design of equal section multi-span continuous bridge.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Feng Tang
AU  - Dejian Li
AU  - Yao Lu
AU  - Heng Mang
AU  - Fei Lv
AU  - Cheng Li
PY  - 2017/06
DA  - 2017/06
TI  - Innovative Seismic Isolation System of Equal Section Multi-span Continuous Beam Bridge with LRB and FVD: Numerical Simulation and Engineering Implementation
BT  - Proceedings of the 2017 Global Conference on Mechanics and Civil Engineering (GCMCE 2017)
PB  - Atlantis Press
SP  - 206
EP  - 218
SN  - 2352-5401
UR  - https://doi.org/10.2991/gcmce-17.2017.39
DO  - 10.2991/gcmce-17.2017.39
ID  - Tang2017/06
ER  -