Large-Span Cable-Stayed Bridge Seismic Response Analysis Considering Traveling Wave Effect

2013 ◽  
Vol 477-478 ◽  
pp. 1034-1037
Author(s):  
Juan Juan Zhao
Keyword(s):  
Traveling Wave ◽  
Response Analysis ◽  
Control Force ◽  
Characteristic Analysis ◽  
Wave Effect ◽  
Large Span ◽  
Traveling Wave Effect ◽  
Finite Element Software ◽  
Cable Stayed Bridge ◽  
Elastic Response Spectra

In this paper, three-tower cable-stayed bridge Jinan Jianbang as the researched object, is to built to two models of the bridge with piles and without piles using the finite element software , and is made dynamic characteristic analysis. Meanwhile it is compared the control force of and the elastic response spectra and time history analysis under different conditions.At the same time ,bridge model without pile is excitated by multi-point for traveling wave effect analysis. The results show that pile-soil effects make more greater impact on forces of large span structures, and traveling wave effect on the adverse effects of large-span cable-stayed bridge shoule be considered in the seismic design.

Seismic Response Analysis for Tunnel Conveying Water under Traveling Waves Excitation

2012 ◽  
Vol 166-169 ◽  
pp. 2050-2053
Author(s):  
Jin Yun Liu ◽  
Cai Chu Xia ◽  
Sheng Nan Sun
Keyword(s):  
Seismic Response ◽  
Traveling Wave ◽  
Large Scale ◽  
Water System ◽  
Response Analysis ◽  
Wave Effect ◽  
Earthquake Excitation ◽  
Traveling Wave Effect ◽  
Variation Characteristics ◽  
Rock Tunnel

For large-scale water-conveying tunnel, the spatial variation characteristics of earthquake excitation, namely, multi-point input has great effects on seismic response of the water-conveying tunnel. Aim at this problem, the paper considers interaction of surrounding rock-tunnel lining-water system and considers traveling wave effect. The result indicates: compare with the coincident earthquake excitation, traveling wave effect brings disadvantageous influence on seismic response of the water-conveying tunnel.

Nonlinear Seismic Response Analysis of Cable-Stayed Bridge under Uniform and Traveling-Wave Excitations

2015 ◽  
Vol 744-746 ◽  
pp. 793-798
Author(s):  
Kai Yan Xu
Keyword(s):  
Traveling Wave ◽  
Response Analysis ◽  
Wave Excitation ◽  
The Finite Element Method ◽  
Seismic Response Analysis ◽  
Nonlinear Seismic Response ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Flexible Component ◽  
Method Model

The finite element method model of a 670.56m span cable-stayed bridge was established and the dynamic characteristic and nonlinear earthquake-responses of it under uniform and traveling-wave excitations were systematic studied. Results show that: 1) its former 10 rank frequency are located very dense which shows that more modes shape should be considered when dealing with the dynamic analysis. 2) The traveling-wave excitation has greater effect on long-span cable-stayed bridge, especially on the more flexible component and great attention should be paid to the design of such kind of bridge.

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.

Seismic Response Analysis of a Large Span Bridge with Inconsistent Inputs

2013 ◽  
Vol 275-277 ◽  
pp. 1389-1392
Author(s):  
Liang Wang ◽  
Xia Xin Tao ◽  
Hai Ming Liu ◽  
Wen Jun Gao
Keyword(s):  
Free Vibration ◽  
Seismic Response ◽  
Response Analysis ◽  
Seismic Response Analysis ◽  
Large Span ◽  
Finite Element Software ◽  
Bridge Model ◽  
Vertical Displacements ◽  
Internal Forces ◽  
Main Girder

Seismic response of a large span cable based bridge with inconsistent inputs is analyzed in this paper. The bridge model is built by the function of finite element software ANSYS. The free vibration characteristics of the bridge are analyzed by Lanczos Vector Iterative method. The first and the twentieth free vibration frequencies are 0.06808 Hz and 0.54392 Hz respectively. A set of motions of consistent, traveling wave and synthesized (inconsistent) are adopted as inputs at the two supports. The lengthwise, lateral and vertical displacements at the span center and quarter span of the main girder, at the tops of the supporting towers, and the internal forces in the girder and at the base of the towers are calculated. The result shows obviously the necessity to take into account inconsistent input in seismic response analysis of large span bridge.

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