Traffic Induced Vibrations at Road-Bridge - Experimental and Numerical Analysis
(2012) In TVSMCivil Engineering (M.Sc.Eng.)
Structural Mechanics
- Abstract
- In the north-east part of Lund, Sweden, the MAX IV facility is (in the event of writing this thesis) under construction. MAX IV is a synchrotron radiation facility which has a high requirement regarding low vibrations.
Within this thesis a nearby road-bridge for the highway E22 was studied using experimental and numerical methods. The aim was to determine the magnitude of the road-bridge influence to the ground vibrations during passages of vehicles and thereby possibly explain the high levels of vibrations which have been measured during occasional events.
A finite element model of the road-bridge and surrounding soil was created
using the software Abaqus. Material and soil-layering properties were defined according to a database... (More) - In the north-east part of Lund, Sweden, the MAX IV facility is (in the event of writing this thesis) under construction. MAX IV is a synchrotron radiation facility which has a high requirement regarding low vibrations.
Within this thesis a nearby road-bridge for the highway E22 was studied using experimental and numerical methods. The aim was to determine the magnitude of the road-bridge influence to the ground vibrations during passages of vehicles and thereby possibly explain the high levels of vibrations which have been measured during occasional events.
A finite element model of the road-bridge and surrounding soil was created
using the software Abaqus. Material and soil-layering properties were defined according to a database which have been created during previous geotechnical studies. Geometry of the road-bridge was defined according to construction drawings.
The model was studied in two types of analysis; a steady-state and a transient analysis. The transient analysis was based on a load-case which was created in CALFEM/MATLAB using a simple standard axle model which was connected to a continuous beam model. A comparison between measurement data and modelling result was made. The comparison showed that the measured and predicted displacements of the road-bridge during a passage of a vehicle were approximately in the same magnitude.
Calculation of 1 s RMS levels of the vibration for the transient load-case at a specific point in the ground, identical to a stationary seismometer location, was done. The 1 s RMS value were below 20 nm in all three directions. It was therefore concluded that the suggested transient load-case not could explain the high levels of vibrations(>200 nm 1s RMS > 5 Hz) which had been measured previously.
Although the transient load-case approximated the passage of a vehicle fairly well it was concluded that a more refined load-case and model were needed in order to continue the investigation. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/3567006
- author
- Baggens, Oskar
- supervisor
-
- Nils Rydén LU
- Brian Norsk Jensen LU
- organization
- year
- 2012
- type
- H3 - Professional qualifications (4 Years - )
- subject
- publication/series
- TVSM
- report number
- TVSM-5184
- ISSN
- 0281-6679
- language
- English
- id
- 3567006
- date added to LUP
- 2013-03-21 13:18:22
- date last changed
- 2013-09-06 11:56:18
@misc{3567006,
abstract = {{In the north-east part of Lund, Sweden, the MAX IV facility is (in the event of writing this thesis) under construction. MAX IV is a synchrotron radiation facility which has a high requirement regarding low vibrations.
Within this thesis a nearby road-bridge for the highway E22 was studied using experimental and numerical methods. The aim was to determine the magnitude of the road-bridge influence to the ground vibrations during passages of vehicles and thereby possibly explain the high levels of vibrations which have been measured during occasional events.
A finite element model of the road-bridge and surrounding soil was created
using the software Abaqus. Material and soil-layering properties were defined according to a database which have been created during previous geotechnical studies. Geometry of the road-bridge was defined according to construction drawings.
The model was studied in two types of analysis; a steady-state and a transient analysis. The transient analysis was based on a load-case which was created in CALFEM/MATLAB using a simple standard axle model which was connected to a continuous beam model. A comparison between measurement data and modelling result was made. The comparison showed that the measured and predicted displacements of the road-bridge during a passage of a vehicle were approximately in the same magnitude.
Calculation of 1 s RMS levels of the vibration for the transient load-case at a specific point in the ground, identical to a stationary seismometer location, was done. The 1 s RMS value were below 20 nm in all three directions. It was therefore concluded that the suggested transient load-case not could explain the high levels of vibrations(>200 nm 1s RMS > 5 Hz) which had been measured previously.
Although the transient load-case approximated the passage of a vehicle fairly well it was concluded that a more refined load-case and model were needed in order to continue the investigation.}},
author = {{Baggens, Oskar}},
issn = {{0281-6679}},
language = {{eng}},
note = {{Student Paper}},
series = {{TVSM}},
title = {{Traffic Induced Vibrations at Road-Bridge - Experimental and Numerical Analysis}},
year = {{2012}},
}