Seismic response analysis of curved continuous rigid frame bridge under multi-support excitation

2011 ◽  
Author(s):  
Long Peiheng ◽  
Jiang Rong
Keyword(s):  
Seismic Response ◽  
Response Analysis ◽  
Seismic Response Analysis ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
Support Excitation ◽  
Rigid Frame Bridge

Influence of Tie Beams of Pier on the Seismic Performance of a Continuous Rigid Frame Bridge with Twin-Legged Piers

2011 ◽  
Vol 368-373 ◽  
pp. 1105-1110
Author(s):  
Yun Jing Nie ◽  
Xu Yan ◽  
Tie Ying Li
Keyword(s):  
Seismic Response ◽  
Seismic Performance ◽  
Seismic Design ◽  
Dynamic Characteristics ◽  
Natural Frequencies ◽  
Continuous Rigid Frame Bridge ◽  
Analytical Results ◽  
Rigid Frame ◽  
Rigid Frame Bridge

In this paper, the influence of tie beams for piers is investigated on the dynamic characteristics and the seismic performance of a continuous rigid frame bridge with twin-legged piers. Modal analyses and the linear seismic response analyses are performed on a practical continuous rigid frame bridge with twin-legged piers with no tie beam, one tie beam and three tie beams of pier, using software Midas/civil. The findings indicate that installing tie beams of pier can increase the natural frequencies of this kind of bridge. Setting tie beams of pier is disadvantageous to the seismic performance of the bridge beam, but advantageous to improving the seismic performance of the twin-legged piers. The influence of tie beams of pier on the seismic performance on the whole structure is relevant to the pier height. These analytical results provide a reference for the seismic design and analysis of similar structures.

Seismic Response Analysis of Railway Continuous Curved Rigid Frame Bridges

2013 ◽  
Vol 353-356 ◽  
pp. 1846-1849
Author(s):  
Wen Jia Suo ◽  
Bing Zhu ◽  
Ning Zhao ◽  
Fan Wang ◽  
Sheng Tan Dou
Keyword(s):  
Seismic Response ◽  
Seismic Waves ◽  
Time History ◽  
Small Radius ◽  
Response Analysis ◽  
Rigid Frame ◽  
Maximum Reaction ◽  
Rigid Frame Bridge ◽  
Critical Sections ◽  
Response Feature

To study the effects of seismic waves directions on bridges, the time history analytic method was used. Two bridge types, the railway continuous curved rigid frame bridge and the railway continuous straight rigid frame bridge, have been taken into account. Both the two same span bridges were used for comparative analysis about free vibration and seismic response feature, then some practical application conclusions were obtained. The longitudinal and transversal seismic waves produce the maximum reaction values. Besides, the pier bottom sections and the beam sections at the piers top are the critical sections in the bridges. In addition, this small radius curved bridge can be designed as the straight bridge in seismic design.

The Seismic Response Analysis of Continuous Rigid-Frame Bridge - Energy Method

2011 ◽  
Vol 378-379 ◽  
pp. 251-255
Author(s):  
Qi Cai Yu ◽  
Ai Rong Liu ◽  
Ren Xiong ◽  
Hui Jun Yu
Keyword(s):  
Finite Element ◽  
Energy Method ◽  
Reinforcement Ratio ◽  
Degree Of Freedom ◽  
Response Analysis ◽  
Energy Response ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
Rigid Frame Bridge ◽  
The Impact

A 3D Finite Element model of a continuous rigid-frame bridge is constructed by the Midas/Civil bridge finite element analysis program in this paper, where fiber elements and plastic hinges are used for bridge piers. The lump mass method is used to simplify the infinite-degree-of-freedom continuous rigid-frame bridge into a multi-degree of freedom model. The energy solution of continuous rigid-frame bridge is given, and the time-history analysis of the bridge is applied. In addition, the energy response of continuous rigid-frame bridge with different pier height and reinforcement ratio are given based on the energy method, revealing the impact of pier height and reinforcement ratio on the displacement and energy response of continuous rigid-frame bridge.

Analysis on Long-Span Bridge Seismic Response in Multi-Dimensional and Multi-Point Mode

2011 ◽  
Vol 117-119 ◽  
pp. 58-61
Author(s):  
Cang Hai Zhang ◽  
Jun Wu Dai
Keyword(s):  
Seismic Response ◽  
Single Track ◽  
Academic Field ◽  
Excitation Mode ◽  
Long Span ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
Long Span Bridge ◽  
Rigid Frame Bridge ◽  
Specific Project

The Seismic excitation mode has been the hot and difficult topic both in engineering and academic field. This paper mainly discussed the excitation direction and the combination of excitation direction of ground motion, comparatively analyzed seismic response in four excitation mode, which including the single-track one-point incentive, single-track multi-point incentive, much-track one-point incentive, and much-track multi-point incentive, with specific project examples of large-span continuous rigid frame bridge, and get the corresponding conclusions.

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