|Table of Contents|

Influence of bridge surface roughness on vehicle-bridge coupled vibration of long-span suspension bridge(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2009年04期
Page:
53-58
Research Field:
Publishing date:
2009-08-20

Info

Title:
Influence of bridge surface roughness on vehicle-bridge coupled vibration of long-span suspension bridge
Author(s):
WANG Da1; HAN Wan-shui2; HUANG Ping-ming2; LIU Jian2
1.School of Civil Engineering and Architecture,Changsha University of Science and Technology,Changsha 410064,Hunan,China;2.School of Highway,Chang’an University,Xi’an 710064,Shaanxi,China
Keywords:
bridge engineering;  bridge surface roughness;  vehiclebridge coupled vibration;  impact factor;  power spectral density function;  displacement time history
PACS:
U441.3
DOI:
-
Abstract:
Bridge surface roughness is one of the key aspects to affect the vehiclebridge coupled vibration. Based on the separated iterative method, taking the wheel and the bridge surface contact as the connection point, this paper divides the vehiclebridge coupled vibration system into the vehicles, bridge surface roughness and the bridge structure. Supposing the bridge surface roughness is the average value for the zero steady Gauss stochastic process, this paper uses the DRPSD function to establish very smooth, general smooth and the rough three kind of bridge surface roughness model. Unifying the vehiclebridge coupled vibration analysis program, taking longspan suspension bridge as the object, this paper studies the each power response characteristic under three kinds of different bridge surface roughness condition. The research conclusion indicates that: as the composition of the longspan suspension bridge each main tower, the stiffen girder, the main cable and the suspension cable respective correspondence impact factor has the obvious differences, and under the same condition the same spot inner force and the displacement attacks the coefficient also have the big differences. The research also finds that in the vehiclebridge coupled vibration process the bridge surface appears the big lateral displacement, which will pose the threat to the bridge surface driving security, the main cable and the suspension cable inner force assumes the highfrequency change, these essential structure spot easy to appear wearily, so this problem should be given a high attention. 13 figs, 15 refs.

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Last Update: 2009-08-20