EARTHQUAKE RESPONSE ANALYSIS OF HIGH-ELEVATED MULTI-SPAN CONTINUOUS BRIDGE ON DYNAMIC SOIL-STRUCTURE INTERACTION

As an effective way of passive damping, isolation technology has been widely used in all types of building structures. Currently, for its theoretical analysis, it usually follows the rigid foundation assumption and ignores soil-structure interaction, which results in calculation results distortion in conducting seismic response analysis. In this paper, three-dimensional finite element method is used to establish finite element analysis model of large chassis single-tower base isolation structure which considers and do not consider soil-structure interaction. The calculation results show that: after considering soil-structure interaction, the dynamic characteristics of the isolation structure, and seismic response are subject to varying degrees of impact.

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Seismic Response Analysis of Liaocheng Guangyue Tower

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.744-746.911 ◽

2015 ◽

Vol 744-746 ◽

pp. 911-914

Author(s):

Zhao Bo Meng ◽

Guan Dong Qiao ◽

Jie Jin

Keyword(s):

Seismic Response ◽

Soil Structure ◽

Natural Frequencies ◽

Timber Structure ◽

Soil Structure Interaction ◽

Response Analysis ◽

Actual Situation ◽

Seismic Response Analysis ◽

Structure Interaction ◽

Rare Earthquake

This paper establishes three models using ANSYS, which were timber structure of Guangyue Tower, timber structure-tower base and timber structure-tower base-foundation. The first 3 natural frequencies of timber structure respectively were 0.8524Hz、1.1273 Hz and 1.7426 Hz through modal analysis, which were compared with calculations from code. Lanzhou Wave was chosen to analyze the seismic response of Guangyue Tower, and the amplitudes were adjusted to 55gal and 310gal respectively according to the frequent earthquake and rare earthquake, which were inputted to the above models. As can be seen from the calculations, the maximum displacements of the three models were in the top nodes, and tower base had a greater impact on vibration of timber structure, which could not be ignored in seismic response analysis; considering soil-structure interaction in seismic response analysis could better reflect the actual situation of Guangyue Tower.

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Research of Longitudinal Seismic Response of Self-Anchored Cable-Stayed Suspension Bridge under Pile-Soil-Structure Interaction

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.255-260.1167 ◽

2011 ◽

Vol 255-260 ◽

pp. 1167-1170

Author(s):

Feng Miao ◽

Wang Bo ◽

Guan Ping

Keyword(s):

Seismic Response ◽

Soil Structure ◽

Suspension Bridge ◽

Soil Structure Interaction ◽

Response Analysis ◽

Fe Model ◽

Longitudinal Displacement ◽

Finite Element Program ◽

Structure Interaction ◽

Element Program

Based on scheme of Dalian gulf cross-sea bridge, in this paper, a 3-dimensional FE model for Self-anchored cable-stayed suspension bridge is established with finite element program and pile-soil-structure interaction is simulated by use of the equivalent embed fixation model. Based on the FE model, model analysis is carried out and the effects of pile-soil-structure interaction on dynamic behavior of long-span self-anchored cable-stayed suspension bridge are specially studied. The seismic response analysis result considering that pile-soil-structure interaction was compared with that of without considering such interaction. The analysis result show that interaction extend the nature period of structure, has the greatest impact to the first vibration mode; meanwhile, enlarged longitudinal displacement and moment of stiffening beam in middle of main span, longitudinal displacement on top of tower and axial force at bottom, but reduced the moment of tower at bottom. The research results provide some theoretical foundation to composite structure system.

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