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.

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.

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.

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.

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.

Elasto-Plastic Analysis of Seismic Response of Valve-Hall Structure with Suspension Valves of Large-Scale Converter Station

2011 ◽  
Vol 94-96 ◽  
pp. 1941-1945
Author(s):  
Yi Wu ◽  
Chun Yang ◽  
Jian Cai ◽  
Jian Ming Pan
Keyword(s):  
Seismic Response ◽  
Large Scale ◽  
Seismic Waves ◽  
Tensile Force ◽  
Response Analysis ◽  
Vertical Acceleration ◽  
Seismic Responses ◽  
Seismic Response Analysis ◽  
Finite Element Software ◽  
Plastic Analysis

Elasto-plastic analysis of seismic responses of valve hall structures were carried out by using finite element software, and the effect of seismic waves on the seismic responses of the valve hall structures and suspension equipments were studied. Results show that significant torsional responses of the structure can be found under longitudinal and 3D earthquake actions. Under 3D earthquake actions, the seismic responses of the suspension valves are much more significant than those under 1D earthquake actions, the maximum tensile force of the suspenders is about twice of that under 1D action. The seismic responses of the suspension valves under vertical earthquake actions are much stronger than those under horizontal earthquake actions, when suffering strong earthquake actions; the maximum vertical acceleration of the suspension valves is about 4 times of that under horizontal earthquake actions. It is recommended that the effects of 3D earthquake actions on the structure should be considered in seismic response analysis of the valve hall structure.

Numerical simulation for large-scale seismic response analysis of immersed tunnel

2006 ◽  
Vol 28 (10) ◽  
pp. 1367-1377 ◽  
Author(s):  
Jun-Hong Ding ◽  
Xian-Long Jin ◽  
Yi-Zhi Guo ◽  
Gen-Guo Li
Keyword(s):  
Numerical Simulation ◽  
Seismic Response ◽  
Large Scale ◽  
Response Analysis ◽  
Seismic Response Analysis ◽  
Immersed Tunnel

Seismic Response Analysis of LNG Storage Tank under the Vertical Earthquake Excitation

2013 ◽  
Vol 368-370 ◽  
pp. 1743-1746
Author(s):  
Li Jian Zhou ◽  
Yuan Gang Fan ◽  
Bin Gao ◽  
Xiang Ying Wang
Keyword(s):  
Finite Element ◽  
Seismic Response ◽  
Storage Tank ◽  
Axial Stress ◽  
Equivalent Stress ◽  
Response Analysis ◽  
Seismic Action ◽  
Seismic Response Analysis ◽  
Earthquake Excitation ◽  
Finite Element Software

Use Adina finite element software, established the finite element model of the the volume 10000m3LNG storage tank, against the concrete outer tank of full containment type LNG storage tank vertical seismic action seismic response analysis. Take acceleration seismic input method, select the four categories venue seismic waves, LNG storage tank stress analysis of vertical seismic action, come in different earthquake LNG storage tank outer tank equivalent stress, hoop stress and axial stress distribution.

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