scholarly journals Influence of Traveling Wave Effect on Passive Seismic Control of Long-Span Bridge

2011 ◽  
Vol 14 ◽  
pp. 2307-2314
Author(s):  
L.I. Zhengying ◽  
M.U. Dejian ◽  
Dang Pengpeng
Keyword(s):  
Traveling Wave ◽  
Wave Effect ◽  
Traveling Wave Effect ◽  
Seismic Control ◽  
Long Span ◽  
Long Span Bridge ◽  
Passive Seismic

Research on Longitudinal Seismic Response of Continuous Welded Rail on Bridge with High-Pier and Long-Span

2013 ◽  
Vol 838-841 ◽  
pp. 1063-1068
Author(s):  
Jie Ling Xiao ◽  
Xian Kui Wei ◽  
Ping Wang ◽  
Meng Nan Zhang
Keyword(s):  
Traveling Wave ◽  
Seismic Waves ◽  
Longitudinal Force ◽  
Seismic Action ◽  
Apparent Velocity ◽  
Wave Effect ◽  
Traveling Wave Effect ◽  
Long Span ◽  
High Pier ◽  
Earthquake Zone

Longitudinal seismic responses of CWR on bridges with high-piers and long-spans under uniform excitation and traveling wave effect were studied. Results are shown as follows: Under seismic action, rail longitudinal forces near beam joints increase greatly than rail expansion forces (due to beam expansion); Designing CWR on bridges with high-piers and long-spans needs to consider influences of traveling wave effect and wave spreading derection; With the increase of the apparent velocity of seismic waves, rail longitudinal force tends to decrease; We suggest that designing of CWR on bridges crossing high-intensity earthquake zone should consider impact of seismic action, and establish a reasonable check method.

Seismic Response of Long Span Continuous Rigid-Framed Steel Arch Bridge

2018 ◽  
Vol 763 ◽  
pp. 1087-1094
Author(s):  
Ai Rong Liu ◽  
Yong Lin Pi
Keyword(s):  
Seismic Response ◽  
Shear Wave ◽  
Traveling Wave ◽  
Wave Speed ◽  
Wave Effect ◽  
Earthquake Excitation ◽  
Arch Bridge ◽  
Shear Wave Speed ◽  
Traveling Wave Effect ◽  
Long Span

This paper investigates seismic responses of Xinguang Bridge, a 3-span continuous rigid-frame and steel-truss arch bridge. Earthquake excitation input is a key issue for the seismic analysis. This paper uses a finite element method to study the traveling wave effect on Xinguang Bridge and its interaction with the dynamic properties of the bridge under the condition of two steps and two levels probability. The seismic response of the bridge under the coincident earthquake excitation is also analyzed. Comparisons show that the seismic response of the long-span bridge by considering the traveling wave effect is much different from that under consistent earthquake excitation. The influence of the shear wave speed on the seismic response of the long span continuous bridge is also explored and the shear wave speed is found to greatly affect the wave shape and magnitude of the time-history of the longitudinal displacement at the crown of the main arch of the bridge. It is concluded that traveling wave effect and shear wave speed of ground have significant influences on the seismic response of the long span continuous rigid-framed and steel-truss arch bridge.

Analysis of Traveling Wave Effect on Half-Through CFST Arch Bridge by Large Mass Method

2013 ◽  
Vol 540 ◽  
pp. 21-28 ◽  
Author(s):  
Jun Ma ◽  
Yan Li
Keyword(s):  
Seismic Response ◽  
Traveling Wave ◽  
Large Mass ◽  
Wave Effect ◽  
Arch Bridge ◽  
Traveling Wave Effect ◽  
Long Span ◽  
Cfst Arch Bridge ◽  
Internal Forces ◽  
Large Mass Method

For long span arch bridges, the traveling wave effect is an important aspect on seismic response of structure which cannot ignore. The Big Mass Method was used to analyze the seismic response of a half-through CFST arch bridge under both uniform and non-uniform excitations. The results showed that the traveling wave effect caused by non-uniform excitation led to more obvious seismic response in both internal forces and displacements. The skewback section was most dangerous. The waveform of internal forces caused by non-uniform excitation was quite similar to that caused by uniform excitation, but the amplitude of the latter is bigger than the former. It can conclude that the traveling wave effect would cause the unsynchronized vibration to the structure elements which led to the lager responses.

scholarly journals Seismic Analysis of Hybrid System Bridge of Multi-Span Continuous Girder and Arches

2020 ◽  
Vol 165 ◽  
pp. 04032
Author(s):  
Kuihua Mei ◽  
Wangwang Fu ◽  
Jufeng Su
Keyword(s):  
Finite Element ◽  
Seismic Response ◽  
Wave Velocity ◽  
Traveling Wave ◽  
Seismic Isolation ◽  
Bending Moment ◽  
Internal Force ◽  
Wave Effect ◽  
Traveling Wave Effect ◽  
Large Mass Method

The Chengdong Hanjiang Bridge in Ankang City is a multi-span continuous beam-arch combination system bridge of (75+2×125+160+2×125+75) m, and its site is located in the earthquake zone. Calculation model based on Midas / Civil finite element software process analysis method is applied to seismic response analysis using power. At the same time, in order to influence the travelling wave effect and the seismic isolation system on the internal force of the bridge structure, corresponding finite element models were established and calculated with time history analysis. The finite element model under non-uniform excitation uses the “Large Mass Method” (LMM) for analysis and calculation under different wave velocity multi-point excitations. The results show that after considering the traveling wave effect, the displacement and bending moment of the control section of each hole increase, and the internal force of the fixed pier increases. When the wave velocity is 600m/s, the traveling wave effect strengthens the seismic response of the structure the most. With the increase of the wave velocity, the seismic response of the structure gradually approaches the seismic response under uniform excitation. After the friction pendulum seismic isolation support is used, it is fixed. The bending moment of Pier No.32 has been reduced by 80%, the stiffness of the whole bridge is more balanced, the forces of each pier are relatively close, and the isolation effect is good.

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.

The Seismic Performance Analysis of the Overpass by the Traveling-Wave Effect

2012 ◽  
Vol 157-158 ◽  
pp. 632-635
Author(s):  
Qing Guan Lei ◽  
Hui Fang ◽  
Jian Guo Wang
Keyword(s):  
Seismic Performance ◽  
Seismic Design ◽  
Traveling Wave ◽  
Rapid Development ◽  
Bending Moment ◽  
Wave Effect ◽  
Traveling Wave Effect ◽  
Design Requirements ◽  
Performance Research ◽  
Space Effects

With the rapid development of the cities, the construction of the overpasses is increasingly common, while the safety performance of the overpasses are drawing more and more people's attention. China is a country prone to earthquakes, the seismic performance research of the overpasses would have to consider the space impact of earthquakes motion. China's current code of seismic design can not meet the seismic design requirements of the overpasses, there is not full consideration the space effects of earthquakes besides the time effects. This paper analyzes the structure bending moment of the overpasses under the traveling wave effect from the variation of the earthquakes.

Traveling Wave Effect Analysis on Fabricated Box Girder Bridge Based on ANSYS

2014 ◽  
Vol 587-589 ◽  
pp. 1512-1517
Author(s):  
Qian Hui Liu ◽  
Zheng Xin Zhang
Keyword(s):  
Traveling Wave ◽  
Relative Displacement ◽  
Internal Force ◽  
Expansion Joint ◽  
Wave Effect ◽  
Box Girder ◽  
Effect Analysis ◽  
Traveling Wave Effect ◽  
Box Girder Bridge ◽  
Girder Bridge

This paper analyzed the seismic response of fabricated box girder bridge considering the traveling wave effect based on ANSYS. Take a multi-connected continuous girder bridge over sea island as the research object, consider the effect of pile-soil interaction, the internal force and deformation characteristics of substructure, coping and expansion joint of the bridge are analyzed under the traveling wave effect. Traveling wave effect have some influence on the internal force and deformation of substructure and coping, but the influence is not so strong. Meanwhile the relative displacement of expansion joint and collision force of beam end are influenced significantly, and the risk of girder falling is increased.

scholarly journals Experiment and Application of Market-Based Control for Engineering Structures

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
Gang Li ◽  
Wen Wang ◽  
Hong-Nan Li
Keyword(s):  
Structural Model ◽  
Travelling Wave ◽  
Space Structure ◽  
Wave Effect ◽  
Engineering Structures ◽  
Large Space ◽  
Long Span ◽  
Long Span Bridge ◽  
Large Space Structure ◽  
Travelling Wave Effect

An experimental study on the vibration control of a single-degree-of-freedom model is carried out to verify market-based control (MBC) strategy effect. Results show that the MBC strategy can reduce both displacement and acceleration responses. Additionally, the MBC strategy is applied to a long-span bridge considering the travelling wave effect. Numerical simulations indicate that the displacement and acceleration responses of the long-span bridge with the travelling wave effect are smaller than those without, and the larger the velocity of travelling wave is, the better the control effect of MBC is. Based on the MBC theory and multimarket-based control (MMBC) presented here it is further applied to a large-space structure considering multiple dimensional features of structural model and ground motions. It is concluded that the MMBC strategy reduces the displacement response of the large-space structure, especially on vertical displacements, but has limited control effects on accelerations.

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