Ambient vibration tests and analysis of a multiple-span elevated bridge

2012 ◽  
pp. 393-398 ◽  
Author(s):  
X Chen ◽  
P Omenzetter ◽  
S Beskhyroun
Keyword(s):  
Ambient Vibration ◽  
Ambient Vibration Tests ◽  
Elevated Bridge ◽  
Vibration Tests

scholarly journals Ambient Vibration Tests of an Arch Dam with Different Reservoir Water Levels: Experimental Results and Comparison with Finite Element Modelling

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Sergio Vincenzo Calcina ◽  
Laura Eltrudis ◽  
Luca Piroddi ◽  
Gaetano Ranieri
Keyword(s):  
Finite Element ◽  
Natural Frequencies ◽  
Water Levels ◽  
Arch Dam ◽  
Experimental Results ◽  
Ambient Vibration ◽  
Reservoir Water ◽  
Ambient Vibration Tests ◽  
Vibration Properties ◽  
Vibration Tests

This paper deals with the ambient vibration tests performed in an arch dam in two different working conditions in order to assess the effect produced by two different reservoir water levels on the structural vibration properties. The study consists of an experimental part and a numerical part. The experimental tests were carried out in two different periods of the year, at the beginning of autumn (October 2012) and at the end of winter (March 2013), respectively. The measurements were performed using a fast technique based on asynchronous records of microtremor time-series. In-contact single-station measurements were done by means of one single high resolution triaxial tromometer and two low-frequency seismometers, placed in different points of the structure. The Standard Spectral Ratio method has been used to evaluate the natural frequencies of vibration of the structure. A 3D finite element model of the arch dam-reservoir-foundation system has been developed to verify analytically determined vibration properties, such as natural frequencies and mode shapes, and their changes linked to water level with the experimental results.

Ambient Vibration Tests of Suspension Bridge

1978 ◽  
Vol 104 (5) ◽  
pp. 983-999
Author(s):  
Ahmed M. Abdel-Ghaffar ◽  
George W. Housner
Keyword(s):  
Suspension Bridge ◽  
Ambient Vibration ◽  
Ambient Vibration Tests ◽  
Vibration Tests

scholarly journals Structural Behavior of the General Archive of the Nation (AGN) Building, Mexico

2018 ◽  
Vol 3 (3) ◽  
pp. 39
Author(s):  
Marcos Chávez ◽  
Fernando Peña ◽  
Claudia Cruz ◽  
Gustavo Monroy
Keyword(s):  
Dynamic Properties ◽  
Ambient Vibration ◽  
Structural Behavior ◽  
High Plasticity ◽  
Fundamental Vibration ◽  
Vibration Period ◽  
Ambient Vibration Tests ◽  
Smeared Crack ◽  
The Government ◽  
Vibration Tests

This article presents a study on the structural behavior of the Government Building that is part of the old Lecumberri Palace and which currently houses the Mexican General Archive of the Nation. This building was inaugurated in 1900 and closed in 1976, after serving as a prison for 76 years. It was reopened in 1982 after it had undergone several remodeling works. The construction is made of brick masonry with lime mortar. It is supported by a deposit of overly compressible high-plasticity clays. The main problems of this building are the appearance of cracks in both interior and exterior walls, and moisture in the ground floor, caused by differential settlements. The study entailed a geometric and a damage survey as well as ambient vibration tests in order to determine the dynamic properties of the construction. The data obtained was used for the making of a model that, using the finite element method, was analyzed under different load conditions. This study has focused on the overall response with the assumption of smeared crack damage. According to the results, the building’s safety was deemed as acceptable. It has the capability to withstand seismic actions as established by the Mexican Building Code due to the high density of its walls and the resulting stiffness, which infer that the fundamental vibration period of the building would be distant from the predominant vibration period of the soil. This highlights the idea that the building’s critical condition is constituted by the differential settlements, which cause damage in the construction.

scholarly journals Damping estimation using free decays and ambient vibration tests

2010 ◽  
Vol 24 (5) ◽  
pp. 1274-1290 ◽  
Author(s):  
Filipe Magalhães ◽  
Álvaro Cunha ◽  
Elsa Caetano ◽  
Rune Brincker
Keyword(s):  
Ambient Vibration ◽  
Ambient Vibration Tests ◽  
Vibration Tests ◽  
Damping Estimation

scholarly journals Identification of Modal Parameters of Bridges Using Ambient Vibration Measurements

2015 ◽  
Vol 2015 ◽  
pp. 1-21 ◽  
Author(s):  
Damir Zenunovic ◽  
Mirsad Topalovic ◽  
Radomir Folic
Keyword(s):  
Mathematical Models ◽  
Ambient Vibration ◽  
Mode Shapes ◽  
Modal Parameters ◽  
Vibration Measurements ◽  
Ambient Vibration Tests ◽  
Real Nature ◽  
Vibration Tests ◽  
Ambient Vibration Measurements ◽  
Existing Bridges

The paper provides an overview of ambient vibration tests and numerical analysis performed in the framework of Project NATO SfP 983828. The aim of the research is the definition of the dynamic characteristics of bridges on the examples. The paper considers three case studies: two older existing bridges and one newly constructed bridge. A comparative analysis of natural frequencies and mode shapes, obtained by ambient vibration measurements (AVM) and mathematical models (AMs), was carried with the aim to demonstrate the usefulness of ambient vibration tests for identification of the modal parameters of the tested bridge structure. Agreement between AVM and AMs results is very good. The mode shapes are very similar. Some differences between computed and measured frequencies were obtained, which can be attributed to the real nature of the boundary conditions, the uncertainty in the material properties of structure elements, and the mathematical models assumptions.

Sign in / Sign up

Export Citation Format

Share Document