Influence of Soil-Pile Interaction on Seismic Mitigation Effectiveness with FPB for Curved Girder Bridge

2011 ◽  
Vol 368-373 ◽  
pp. 971-974
Author(s):  
Xing Jun Qi ◽  
Shu Gang Chen
Keyword(s):  
Seismic Response ◽  
Three Dimensional ◽  
Internal Force ◽  
Calculation Model ◽  
Continuous Girder Bridge ◽  
Pile Interaction ◽  
Plane Shape ◽  
Girder Bridge ◽  
Friction Pendulum ◽  
Main Girder

The seismic response of curved girder bridge is more complex because of its irregular plane shape. Friction pendulum bearing (FPB) has a positive effect on structural seismic response. The seismic response mitigation effectiveness of FPB to curved girder bridge with soil-pile interaction considered is needed to research. The three-dimensional calculation model of a curved continuous girder bridge is established, and FPB are added at the positions of sliding bearings with soil-pile interaction. The influence of soil-pile interaction on seismic response mitigation effectiveness of FPB is computed and analyzed under three-dimensional ground motion action. The results show that the seismic response mitigation effectiveness of FPB is quite obvious with or without soil-pile interaction considered. Furthermore, seismic response mitigation effectiveness of FPB increases for the internal force of piers after soil-pile interaction considered. FPB has great and positive mitigation effectiveness on the seismic longitudinal displacement of the main girder of curved girder bridge, but with soil-pile interaction considered the mitigation effectiveness decreases a bit.

Seismic Mitigation Analysis of Viscous Dampers for Curved Continuous Girder Bridge

2011 ◽  
Vol 90-93 ◽  
pp. 1230-1233 ◽  
Author(s):  
Yi Liu ◽  
Xing Jun Qi ◽  
Yi Jian Wang ◽  
Shu Gang Chen
Keyword(s):  
Seismic Response ◽  
Coupling Effect ◽  
Three Dimensional ◽  
Internal Force ◽  
Viscous Dampers ◽  
Absorption Effect ◽  
Curved Bridge ◽  
Continuous Girder Bridge ◽  
Girder Bridge ◽  
Seismic Mitigation

The seismic response of curved girder bridge is more complex because of its irregular plane shape, therefore, the systematic study of an effective seismic mitigation method is required. In this article, the three-dimensional computational model of a double-pier curved continuous girder bridge is established and viscous dampers are added at the positions of sliding bearings. The full-bridge seismic response absorption effect is analyzed with the viscous dampers damping method under three ground motions of different frequency spectrum characteristic, and each ground motion contains three-direction. The results show that viscous dampers can reduce the difference of internal force between inner pier and outer pier in double-pier curved bridge, and it can also effectively reduce the bending and twisting coupling effect of curved bridge. But viscous dampers are sensitive to seismic spectrum to some degree, therefore seismic response absorption effect and sensitivity should be considered comprehensively when viscous dampers are selected.

Application of Seismic Energy Dissipation Approach to Curved Continuous Girder Bridge

2011 ◽  
Vol 99-100 ◽  
pp. 224-228
Author(s):  
Xing Jun Qi ◽  
Yi Liu ◽  
Chun Hui Zhang
Keyword(s):  
Energy Dissipation ◽  
Coupling Effect ◽  
Three Dimensional ◽  
Seismic Energy ◽  
Element Model ◽  
Internal Force ◽  
Response Characteristics ◽  
Continuous Girder Bridge ◽  
Girder Bridge ◽  
Seismic Mitigation

Under earthquake action there are irregular rotating displacements in the curved girder bridge, and the effective seismic mitigation method for curved bridge need to be systematically studied. The spatial finite element model is established for a curved continuous girder bridge with double-column piers. Energy dissipation dampers including E-steel dampers, viscous dampers, friction pendulum bearings and lead rubber bearings are set in radial and tangent directions of the curve at the positions of active bearings. The seismic mitigation effectiveness and seismic response characteristics of the curved girder bridge are calculated and analyzed with the four energy dissipation approaches under three dimensional ground motion action. The results indicate that the four energy dissipation approaches can all effectively reduce the bending moments and torsional moments at the bottom of piers, and the bending torsion coupling effect of the curved girder bridge is decreased a bit. The difference of internal force for inside and outside piers is reduced after the dampers set for the curved girder bridge with double-column piers. Relatively, the viscous damper approach can further reduce the whole seismic responses of curved continuous girder bridge, and is an excellent seismic mitigation method suitable for curved girder bridge.

Design of a Super Multispan Continuous Girder Bridge Using Enhanced Seismic Response Modification Technologies

2013 ◽  
Vol 23 (2) ◽  
pp. 198-203 ◽  
Author(s):  
Akira Igarashi ◽  
Hiroyuki Ouchi ◽  
Tetsuo Matsuda ◽  
Hiroshige Uno ◽  
Hiroshi Matsuda ◽  
...  
Keyword(s):  
Seismic Response ◽  
Continuous Girder Bridge ◽  
Girder Bridge

Effect of Radius of Curvature on Seismic Response of Curved Bridge

2011 ◽  
Vol 255-260 ◽  
pp. 1261-1265 ◽  
Author(s):  
Bo Wang ◽  
Yu Xiang Liu
Keyword(s):  
Seismic Response ◽  
Numerical Models ◽  
Response Spectrum ◽  
Radius Of Curvature ◽  
Element Analysis ◽  
Curved Bridge ◽  
The Finite Element Analysis ◽  
Calculation Results ◽  
Girder Bridge ◽  
Main Girder

A four span curved HcontinuousH HboxH-girder bridge is used as an engineering example to investigate the effect of radius of curvature on the seismic response of curved bridge. Numerical models with different radii of curvature are created using the finite element analysis program Midas/Civil. The calculation results obtained from response spectrum method show that radius of curvature is an important parameter to curved bridge. When the radius of curvature is large enough, the relationship between seismic response of main girder and radius is approximately linearity, while nonlinear variation is obtained when theradius is not too large. Finally, conclusions are made that seismic design of Hstraight bridgeH unHfoldHed from curved bridge which radius of curvature is specified could Hsatisfy the engineering Hrequirement.

scholarly journals Effect of Shear Creep on Long-Term Deformation Analysis of Long-Span Concrete Girder Bridge

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Yanwei Niu ◽  
Yingying Tang
Keyword(s):  
Superposition Principle ◽  
Three Dimensional ◽  
Deformation Analysis ◽  
Computation Method ◽  
Shear Creep ◽  
Long Span ◽  
Continuous Girder Bridge ◽  
Girder Bridge ◽  
Concrete Girder

The purpose of this paper is to report on the development of a three-dimensional (3D) creep calculation method suited for use in analyzing long-term deformation of long-span concrete girder bridges. Based on linear creep and the superposition principle, the proposed method can consider both shear creep and segmental multiage concrete effect, and a related program is developed. The effects of shear creep are introduced by applying this method to a continuous girder bridge with a main span of 100 m. Comparisons obtained with the nonshear case show that shear creep causes long-term deformation to increase by 12.5%. Furthermore, the effect of shear creep is proportional to the shear creep coefficient; for a bridge with different degrees of prestress, the influence of shear creep is close. Combined with the analysis of a continuous rigid bridge with a main span of 270 m, the results based on the general frame program suggest that shear creep amplification is multiplied by a factor of 1.13–1.15 in terms of long-term deformation. Moreover, the vertical prestress has little effect on shear creep and long-term deformation. The 3D creep analysis shows a larger long-term prestress loss for vertical prestress at a region near the pier cross section. The relevant computation method and result can be referenced for the design and long-term deformation analysis of similar bridges.

The Analysis of Large Space Shear Wall Structure under Wind Load Force

2012 ◽  
Vol 549 ◽  
pp. 830-833
Author(s):  
Li Jian Zhou ◽  
Ming Kang Shan ◽  
Jin Zhou He ◽  
Yuan Gang Fan
Keyword(s):  
Three Dimensional ◽  
Shear Wall ◽  
Internal Force ◽  
Calculation Model ◽  
Wind Loads ◽  
Load Force ◽  
Wall Structure ◽  
Large Space ◽  
Finite Element Software ◽  
Different Thickness

This paper established three-dimensional calculation model of three large space shear wall structures of different thickness,using finite element software ANSYS to analyze the wind loads and vertical loads of the internal force. And analyze the displacement, internal force distribution pattern. Under the wind loads and vertical loads of three different thickness wall of the large space wall structure.

Research on the Traveling Wave Effect of a Rigid-Continuous Girder Bridge with High Piers Based on Multi-Support Excitation

2013 ◽  
Vol 639-640 ◽  
pp. 548-553
Author(s):  
Hu Jun Lei ◽  
Xiao Zhen Li ◽  
Yan Zhu
Keyword(s):  
Traveling Wave ◽  
Large Mass ◽  
Internal Force ◽  
Wave Effect ◽  
Traveling Wave Effect ◽  
Extreme Response ◽  
Continuous Girder Bridge ◽  
Girder Bridge ◽  
Large Mass Method ◽  
Phase Differences

This paper, aiming at rigid-continuous girder bridge with high piers, uses the large mass method (LMM) to analyze the seismic response of such special structure under a series of different phase differences by considering both rigid foundation and elastic foundation models. In addition, this paper discusses the influence rules for extreme response of different parts of structure due to traveling wave effect. The result shows that traveling wave effect greatly affects the rigid-continuous girder bridge with high piers. When considering the traveling wave effect, the internal force of bridge piers presents increasing trend, and the displacement of pier top reduces with increasing phase differences. The internal force and extreme displacement response of bridge structure present cyclical variations with phase differences, and that cycle is consistent with the characteristic period of bridge.

Dynamic Response of Bridge Girder and Shear Keys Subjected to Pounding during Earthquakes

2013 ◽  
Vol 339 ◽  
pp. 515-519
Author(s):  
Lu He ◽  
Lu Zhang ◽  
Jia Yong Chen ◽  
Chu Dong Pan ◽  
Yu Xiang Liu
Keyword(s):  
Dynamic Response ◽  
Three Dimensional ◽  
The Finite Element Method ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Movement Characteristics ◽  
Shear Keys ◽  
Continuous Girder Bridge ◽  
Bridge Girder ◽  
Girder Bridge

Shear keys have been widely used to control the damage in abutments and piles during earthquakes. To investigate the dynamic response of bridge girder and traverse shear keys subjected to pounding, a three dimensional model of continuous girder bridge is developed in this study. With the assistance of the finite element method program ANSYS and the package LS-DYNA, the pounding between bridge girder and shear keys is simulated. Subsequently, the stress and displacement responses of the model are analyzed, and the movement characteristics are presented.

Parametric Analysis on Incrementally Launched Construction for Concrete Box Girder

2013 ◽  
Vol 838-841 ◽  
pp. 231-236 ◽  
Author(s):  
Ya Jun Wang ◽  
Jie Dai ◽  
Feng Jiang Qin
Keyword(s):  
Parametric Analysis ◽  
Bending Moment ◽  
Internal Force ◽  
Structural Behavior ◽  
Stiffness Ratio ◽  
Dead Load ◽  
Box Girder ◽  
Negative Bending ◽  
Girder Bridge ◽  
Main Girder

The structural behavior of incrementally launched bridges in the construction stages depends on different parameters. Internal force of main girder is influenced by the dead load and stiffness of main girder, the length and stiffness of launching nose. Parametric analysis on the effect of internal force of an 8×60m-span concrete continuous box girder bridge was carried out. The results show that bending moment increases following the increase of weight and stiffness of corresponding segment of main girder. The phenomenon is even more obvious in the negative bending moment region of main girder segment nearby the launching nose. The bending moment of main girder reduces significantly when the stiffness ratio among launching nose and main girder is less than 0.15. While, the negative bending moment of main girder reduces significantly when the length ratio among launching nose and main span is more than 0.58.

Space Seismic Response Analysis of City Elevated Curved Box Girders Bridge

2011 ◽  
Vol 255-260 ◽  
pp. 1096-1101
Author(s):  
Qing Zhao
Keyword(s):  
Seismic Response ◽  
Three Dimensional ◽  
Time History ◽  
Internal Force ◽  
Response Analysis ◽  
Box Girders ◽  
Element Analysis ◽  
History Analysis ◽  
The Finite Element Analysis ◽  
Time History Response

Taking an engineering design case about a city elevated curved box girders bridge, the dynamic calculating model of the curved box girders bridge is created by the finite element analysis program ANSYS. The analysis of curved box girders bridge with space seismic response are discussed, and a time history analysis is conducted for the curved box girders bridge subjected to the E1 Centro earthquake waves in two conditions.The internal force and the displacement time history response curve of the curved box girders bridge are obtained. The results indicate that the seismic response of curved box girders bridge with three-dimensional earthquake are bigger than two-dimensional, and consider the vertical seismic have considerable influence on the axial force of bridge piers, the internal force and displacement of box girders.

Sign in / Sign up

Export Citation Format

Share Document