|Table of Contents|

Numerical Analysis and Field Measurement Validation of Dynamic Characteristics of Simply-supported Beam Railway Bridge(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2019年04期
Page:
87-93
Research Field:
Publishing date:

Info

Title:
Numerical Analysis and Field Measurement Validation of Dynamic Characteristics of Simply-supported Beam Railway Bridge
Author(s):
ZHANG Yi-ming1;  WANG Fei-qiu2;  JIN Shun-li2;  XIE Yi-shun1; 2;  WANG Hao1
(1. School of Civil Engineering, Southeast University, Nanjing 210096, Jiangsu, China; 2. China Railway 24th Bureau Group Co., Ltd., Shanghai 200071, China)
Keywords:
railway bridge;  simply-supported beam bridge;  dynamic characteristics;  field measurement;  numerical calculation
PACS:
U24
DOI:
-
Abstract:
A simply-supported beam railway bridge was employed as an example, the vibration responses of natural vibration frequency and dynamic characteristics were calculated based on ANSYS. The reliability of the calculated results was validated by the field measured acceleration response. On the basis, some key factors which influence the dynamic characteristics of bridges, including bridge span, velocity and train weight were analyzed based on the finite element model. The dynamic response of the simply supported beam bridge was analyzed based on moving load model. The results show that the measured natural frequency and acceleration can match well with the calculated results in general. However, some of the calculated results deviate from the measured ones due to the interference of external factors. The average acceleration calculated value by finite element method is larger than measured value, but the difference in amplitude is small and periodic. Bridge span, velocity and train weight have an influence on dynamic characteristics, and the bridge deflection increases remarkably with the increasing of these factors. With the increase of train speed, the vibration response of simply supported beam bridge is obvious. The bridge vibration increases significantly with the increase of train speed, when the train leaves the bridge. The bridge span and train weight have significant influence on the deflection of bridge midspan, which should be paid more attention to in the design process. The results can provide references for the vibration performance evaluation of railway bridges.

References:

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Last Update: 2019-07-26