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Based on Response Spectrum Finite Element Analysis of Dynamic Characteristics and Seismic Response for Cable-stayed Bridge

Author: HuYueWei
Tutor: LiJin
School: Xi'an University of Architecture and Technology
Course: Bridge and Tunnel Engineering
Keywords: Long Span Bridge The establishment of cable-stayed bridge model Seismic performance Dynamic characteristics Response spectrum analysis Uniform excitation Earthquake response
CLC: U441.3
Type: Master's thesis
Year: 2011
Downloads: 54
Quote: 0
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Abstract


With the rapid development of China's economy, the amount of traffic construction has also been an unprecedented increase in order to meet the large span prestressed concrete cable-stayed bridge field one of the protagonists have been widely used; excellent across capacity and significant structural features make the bridge-type span is increasing and has become the leader in long-span bridges than election. China is an earthquake-prone country, highway line became a lifeline whenever earthquake, the bridge became constitutes the lifeline of the key points. The destruction of the bridge or not will have a direct determinant of the relief and reconstruction work can proceed smoothly carried out, whether the rapid economic recovery, and therefore is closely related with the life. Therefore, as the effective implementation of seismic measures to establish the scientific basis for reasonable seismic structural system to study master bridge seismic capacity, the seismic response is crucial. At home and abroad related outcomes based on the Sutong Bridge practical engineering background, dynamic properties and seismic response of the cable-stayed bridge study as follows: (1) first analyzed the structural characteristics of a large span cable-stayed bridge design parameters as well as the condition of its development, and its seismic design of the current situation, pointed out the need for seismic response analysis; span cable-stayed bridge seismic response analysis for discussion and analysis, obtained in this article to be analyzed the key issues; (2) followed by a systematic exposition, summarizes the seismic response analysis method - response spectrum method and its basic assumptions, problems to adapt to the scope of the analysis process steps as well as the method for a detailed deduction and correction; (3) the use of large finite element analysis software MIDAS, CIVIL, through the appropriate simplified cable-stayed bridge structure, the establishment of its space calculation model as the basis of the dynamic characteristics and seismic response analysis, without considering the pile foundation foundation soil on the case of a bridge, the calculation of the vibration characteristics of cable-stayed bridge; (4) above structure space model based on set damping energy dissipation device and the device is no cable-stayed bridge since vibration characteristics and vibration characteristics were analyzed, and draw analysis conclusions; analysis response spectrum analysis of the seismic response of large span cable-stayed bridge in the uniform excitation, respectively, to explore in the one-way of the earthquake input with a combination of input on the bridge structure response, the summary of the seismic input to calculate the impact of the results of large-span cable-stayed bridge in the direction of damping energy-consuming devices on the seismic performance of cable-stayed bridge; Finally, by comparison damping and damping model on the seismic response results obtained conclusion.

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CLC: > Transportation > Road transport > Bridges and Culverts > Structural principles, structural mechanics > Bridge vibration and damping device
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